diff --git a/index.html b/index.html
index 5faca62..870cc8c 100644
--- a/index.html
+++ b/index.html
@@ -29,6 +29,7 @@
     <!-- still experimenting, see webdav.html -->
     <script src='dependencies/webdav.js'></script> 
 
+    <script src='jxr.js'></script> 
     <!-- replacing with local copies as CDNs are like unpkg tend to be slow
     <script type="module" src="https://unpkg.com/immers-client/dist/destination.bundle.js"></script>
     <script src="https://aframe.io/releases/1.3.0/aframe.min.js"></script>
@@ -62,3419 +63,6 @@
 	<div id="observablehq-result_as_html-ab4c1560"></div>
 </div>
 
-<script type="module">
-/*
-// just text
-import {Runtime, Inspector} from "https://cdn.jsdelivr.net/npm/@observablehq/runtime@4/dist/runtime.js";
-import define from "https://api.observablehq.com/@utopiah/from-pim-to-2d-to-3d-to-xr-explorations@2010.js?v=3";
-import define2 from "https://api.observablehq.com/d/f219f0c440c6d5a2.js?v=3";
-new Runtime().module(define, name => {
-  if (name === "numberOfPages") return new Inspector(document.querySelector("#observablehq-numberOfPages-835aa7e9"));
-  document.querySelector(".a-enter-vr").style.position = "fixed"
-});
-
-// HTML with interactable input
-new Runtime().module(define2, name => {
-  if (name === "viewof offsetExample") return new Inspector(document.querySelector("#observablehq-viewof-offsetExample-ab4c1560"));
-  if (name === "result_as_html") return new Inspector(document.querySelector("#observablehq-result_as_html-ab4c1560"));
-  return ["result_no_name","result"].includes(name);
-});
-// setTimeout( _ => document.querySelector("#gui3d").setAttribute("html", "html:#observablehq-key;cursor:#cursor;" ) , 2000)
-  // <a-entity id="gui3d" class="observableui" position="0 1.5 -.4"></a-entity>
-*/
-</script>
-
-<script>
-/*
-
-motion to data
-	- integer, e.g distance from beginning to end
-	- curve, sampling N points between beginning and end
-
-being able to use that in jxr commands, with example related to positioning entities
-	see https://git.benetou.fr/utopiah/text-code-xr-engine/issues/52#issuecomment-229
-	
-warning that selectedElement will get overwritten once executing a command by pinching
-	consequently in addition to have a history of executed commands
-		there should be a history of selected elements
-			and maybe their changed position states
-*/
-
-// motivated by https://git.benetou.fr/utopiah/text-code-xr-engine/issues/63
-var reservedKeywords = ["selectedElement", "lastPointSketch ", "commandhistory", "groupSelection", "targets", "observe", "sa", "qs"]
-// see generated file reserved-keywords for more yet not sufficient, see instead parseJXR()
-// should also include some documentation
-
-const prefix = /^jxr /
-const codeFontColor = "lightgrey"
-const fontColor= "white"
-const wikiAsImages = "https://vatelier.benetou.fr/MyDemo/newtooling/wiki_graph.json"
-const maxItems = 10
-const now = Math.round( +new Date()/1000 ) //ms in JS, seconds in UNIX epoch
-const baseCachedURL = "https://vatelier.benetou.fr/MyDemo/newtooling/textures/fabien.benetou.fr_" 
-const baseLiveURL = "https://vatelier.benetou.fr/MyDemo/newtooling/web/renders/fabien.benetou.fr_"
-const queryFormatBaseURL = "https://fabien.benetou.fr/"
-const imageExtension = ".png"
-const renderSuffix = "?action=serverrender"
-var selectedElement = null;
-var targets = []
-const zeroVector3 = new THREE.Vector3()
-var bbox = new THREE.Box3()
-bbox.min.copy( zeroVector3 )
-bbox.max.copy( zeroVector3 )
-var selectionBox = new THREE.BoxHelper( bbox.object3D, 0x0000ff);
-var groupHelpers = []
-var primaryPinchStarted = false
-var visible = true
-var setupMode = false
-var setupBBox = {}
-var wristShortcut = "jxr switchToWireframe()"
-var selectionPinchMode = false
-var groupingMode = false
-var sketchEl
-var lastPointSketch
-var hudTextEl // should instead rely on the #typinghud selector in most cases
-const startingText = "[]"
-var drawingMode = false
-var added = []
-const maxItemsFromSources = 20
-let alphabet = ['abcdefghijklmnopqrstuvwxyz', '0123456789', '<>'];
-var commandhistory = []
-const savedProperties = [ "src", "position", "rotation", "scale", "value", ] // add newer properties e.g visibility and generator as class
-var groupSelection = []
-var cabin //storage for load/save. Should use a better name as this is a reminder of a past version rather than something semantically useful.
-const url = "https://fabien.benetou.fr/PIMVRdata/CabinData?action="
-var primarySide = 0
-const sides = ["right", "left"]
-var generators = "line-link-entities link screenstack dynamic-view selectionboxonpinches keyboard "
-	+ "commands-from-external-json glossary timeline issues web-url background-via-url observableui hidableenvironmentfot fot"
-// could be an array proper completed on each relevant component registration
-var heightAdjustableClasses = ["commands-from-external-json"]
-var pinches = [] // position, timestamp, primary vs secondary
-var dl2p = null // from distanceLastTwoPinches
-var selectedElements = [];
-
-let editors = []
-var editorBaseWidth = 50
-
-// could add a dedicated MakeyMakey mode with a fixed camera, e.g bird eye view, and an action based on some physical input that others, thanks to NAF, could see or even use.
-	// ?inputmode=makeymakey
-
-AFRAME.registerComponent('enable-components-via-url', { 
-  init: function () {
-	var src = AFRAME.utils.getUrlParameter('enable-components-via-url')
-	if (src && src != "") {
-		src.split(",").map( c => {
-			this.el.setAttribute(c, "")
-		})
-	}
-  }
-})
-
-AFRAME.registerComponent('disable-components-via-url', { 
-  init: function () {
-	var src = AFRAME.utils.getUrlParameter('disable-components-via-url')
-	if (src && src != "") {
-		src.split(",").map( c => {
-			Array.from( document.querySelectorAll("["+c+"]") ).map( e => { e.removeAttribute(c) })
-		})
-	}
-  }
-})
-
-// e.g background https://fabien.benetou.fr/pub/home/metaverse.png might have to allow options like scale to allow for modifying both size and ratio
-AFRAME.registerComponent('background-via-url', { // non interactive mode
-  init: function () {
-	let generatorName = this.attrName
-	var src = AFRAME.utils.getUrlParameter('background')
-	if (src && src != "") {
-		this.el.setAttribute( "visible", "true")
-		this.el.setAttribute( "src", src )
-		this.el.className += generatorName
-		Array.from( document.querySelectorAll(".mural-instructions") ).map( i => {
-			i.setAttribute("visible", "true") 
-			i.className += generatorName
-		})
-	}
-  }
-})
-
-AFRAME.registerComponent('web-url', {
-// e.g <a-entity id=inbrowser web-url position="0 1.5 -2.4"></a-entity>
-// motivated by https://glitch.com/edit/#!/aframe-lil-gui?path=observablewidget.html
-  init: function () {
-	const url = "https://fabien.benetou.fr/Fabien/Principle?action=webvr"
-	var target = url
-	var src = AFRAME.utils.getUrlParameter('url')
-	// could also be a component parameter
-	var el = this.el
-	let generatorName = this.attrName
-	if (src && src != "") target = src
-	fetch(target).then( res => res.text() ).then( r => {
-	  pageEl = document.createElement("div")
-	  pageEl.id = "page"
-	  pageEl.innerHTML = r
-	  pageEl.style = "visibility:hidden;"
-	  document.body.appendChild(pageEl)
-	  el.setAttribute("html", "html:#page;cursor:#cursor;" )
-	  el.className += generatorName
-	  //backdrop
-	  const geometry = new THREE.PlaneGeometry( el.object3D.children[0].geometry.parameters.width*1.1,
-		el.object3D.children[0].geometry.parameters.height*1.1 );
-	  const material = new THREE.MeshBasicMaterial( {color: 0xffffff, side: THREE.DoubleSide} );
-	  const plane = new THREE.Mesh( geometry, material );
-	  plane.position.z = -.1
-	  el.object3D.add( plane );
-	})
-  }
-})
-
-function sendGlbFromEl(el){
-	const gltfExporter = new THREE.GLTFExporter();
-	const mesh = el.object3D
-
-	const options = {
-	    trs: true,
-	    onlyVisible: true,
-	    truncateDrawRange: false,
-	    binary: true,
-	    maxTextureSize: Infinity
-	};
-
-	gltfExporter.parse(
-	    mesh,
-	    function (result) {
-		if (immersClient) immersClient.sendModel("testing", new Blob([result]), "public")
-		console.log("sent blob")
-		// worked as https://immers.benetou.fr/s/639cb4171757b8382c120da1 of type model
-			// with glb as URL https://immers.benetou.fr/media/edf5641922e6371abb3118f56cd20b9b
-	    },
-	    function (error) {
-		console.log('An error happened during parsing', error);
-	    },
-	    options
-	);
-}
-
-var immersClient
-// See dedicated issue https://git.benetou.fr/utopiah/text-code-xr-engine/issues/47 
-if (false) // disabled for offline tests
-document.querySelector("#immersbundle").addEventListener('load',(event) => { 
-	immersClient = document.querySelector("immers-hud").immersClient
-	document.querySelector('immers-hud').immersClient.sendModel = async function sendModel (name, glb, privacy, icon, to = []) {
-		return this.activities.model(name, glb, icon, to, privacy)
-	} // shim until API update
-	document.querySelector("immers-hud").setAttribute("access-role", "modFull")
-	document.querySelector("immers-hud").immersClient.addEventListener("immers-client-connected", _ => {
-		//immersClient.addEventListener("immers-client-new-message", e => addNewNote(e.detail.message.messageHTML) ) 
-		immersClient.addEventListener("immers-client-new-message", async e => {
-			if (e.detail.message.type == "chat"){
-				let msg = ( await immersClient.activities.getObject( e.detail.message.id ))
-				if (msg.object.context.location )
-					addNewNote( e.detail.message.messageHTML, msg.object.context.location.position ,
-								"0.1 0.1 0.1", null, "immerschat", "true", msg.object.context.location.rotation )
-				else 
-					addNewNote( e.detail.message.messageHTML )
-				// could hook on pinchended
-				// immersClient.place.location = { position: "0 1.5 -2", rotation: "0 190 0" };
-				// immersClient.sendChatMessage(textvalue, "public"); 
-			}
-			if (e.detail.message.type == "media" && e.detail.message.mediaType == "image"){
-				console.log("src", e.detail.message.url)
-				let el = document.createElement("a-box")
-				el.setAttribute("position", -Math.random()+" "+Math.random()*3 + " -1")
-				el.setAttribute("width", ".1")
-				el.setAttribute("height", ".15")
-				el.setAttribute("depth", ".01")
-				el.setAttribute("src", e.detail.message.url.href)
-				AFRAME.scenes[0].appendChild(el)
-			}
-			if (e.detail.message.type == "other"){
-				let msg = ( await immersClient.activities.getObject( e.detail.message.id ))
-				console.log("maybe model, see object.type.model==model", msg )
-			}
-		})
-		immersClient.friendsList().then( r => {
-			if (r.length>0) addNewNote( "Friends:", "-1 1.65 -0.5") 
-			r.map( (u,i) => { 
-				let friendData = u.profile.displayName
-				if (u.locationName) friendData += " at " + u.locationName
-				if (u.locationURL) friendData += " (" + u.locationURL + " )"
-				// addNewNote( friendData, "-1 " + (1.6-i/20) + " -0.5") // should make this interpretable to join there
-				// hidden for workshop
-			} )
-		} ) 
-	})
-});
-
-function ims(msg){ 
-	if (!immersClient) { setFeedbackHUD("not connected via Immers"); return; }
-	immersClient.sendChatMessage(msg, "public")
-} // shorthand for jxr command, still requires parenthesis and quotes though, could be better to have a dedicated visual shorthand, e.g >>
-// can send code too e.g immersClient.sendChatMessage("jxr loadPageRange(3,4)", "public")
-
-/* not sure what's the right way... but timeout works, others don't.
-
-        immers-client-friends-update or immers-client-new-message to keep track of conversations between recurring meeting? Say you join a room, spend a working session with colleagues then leave. Could these be used to in this context to send reminders to those who subscribed to that event?
-*/
-
-var polys
-async function getPolyList(keyword){
-	//return await fetch('/search?keyword='+keyword).then( res => res.json() ).then( res => return res )
-	var response = await fetch('/search?keyword='+keyword);
-	var polys = await response.json()
-	return polys
-}
-
-// for testing purposes, disable when not local with asset caching server
-//getPolyList("pizza").then( p => polys = p.results )
-
-function cachePoly(res){
-	var n = 0;
-	res.map( i => { fetch(i.Thumbnail.replace("https://static.poly.pizza/","http://localhost:7777/getpoly?id=").replace(".webp","")) } ) ;
-	// see await Promise.all()
-}
-// should properly wait. Only once all queries are done then try to load.
-
-function loadPolyThumbnails(res){
-	var n = 0;
-	res.map( i => {
-		var el = document.createElement("a-image");
-		el.setAttribute("src", i.Thumbnail.replace("https://static.poly.pizza/","http://localhost:7777polydata/"));
-		el.setAttribute("position", "0 1 "+n--/10);
-			// could instead attach e.g 9 items to the wrist using wristattachsecondary on a palette
-		el.setAttribute("scale", ".1 .1 .1")
-		el.setAttribute("loadpolyfomthumbnail", "") // that could then be used to execute on pinch based on src property
-		AFRAME.scenes[0].appendChild(el);
-	} )
-}
-
-function loadFirstPolyModel(res){
-	var n = 0;
-	var i = res[n]
-	var el = document.createElement("a-gltf-model");
-	el.setAttribute("src", i.Thumbnail.replace("https://static.poly.pizza/","http://localhost:7777polydata/").replace("webp","glb")); 
-	el.setAttribute("position", "0 1 "+n--);
-	AFRAME.scenes[0].appendChild(el); 
-	return el
-}
-
-function loadPolyModels(res){
-// to load all models, rarely a good idea
-	var n = 0;
-	res.map( i => {
-		var el = document.createElement("a-gltf-model");
-		el.setAttribute("src", i.Thumbnail.replace("https://static.poly.pizza/","http://localhost:7777polydata/").replace("webp","glb")); 
-		el.setAttribute("position", "0 1 "+n--);
-		AFRAME.scenes[0].appendChild(el); 
-		// optionally rescale e.g rescaleModelFromPoly(el) // probably has to wait for it to be properly loaded, cf modelHasLoaded event
-			// e.g rescaleModelFromPoly ( loadFirstPolyModel(polys) ) won't work
-	} )
-}
-
-function rescaleModelFromPoly(modelEl){
-// rescale to fit in 1m3 box
-	var bbox = new THREE.Box3().setFromObject( modelEl.object3D );
-	var rescale = 1 / ( (( bbox.max.x - bbox.min.x) + (bbox.max.y - bbox.min.y) + (bbox.max.z - bbox.min.z) ) /3 );
-	modelEl.setAttribute("scale", rescale+ " " + rescale + " " + rescale)
-	// could also leave untouched if within boundaries, e.g > 0.1 and < 1
-}
-
-// SYNC WITH HMD EDITS before trying this
-/*
-
-source as URL e.g https://fabien.benetou.fr/Fabien/Principle?action=source (locally Fabien.Principle.pmwiki)
-	usual parsing (e.g stop words)
-	dedicated PmWiki cleanup e.g no URL
-	clean up or rather highlight (e.g color not being black) with presence from https://github.com/wordset/wordset-dictionary
-	could also have a short dictionnary of stop words based on popularity
-		e.g https://en.wikipedia.org/wiki/Most_common_words_in_English#100_most_common_words
-		but seems so short it might not help much, could try long and popular instead
-WPM * distance travelled as metric, not just 1
-
-can generate layout for keyboard as (Ctrl shortcut) copiable items to append to AR clipbard
-	https://twitter.com/utopiah/status/1533690234424139779
-		could also use an optional type in addition to target
-			such items would be copied without pressing Ctrl
-
-see remoteSave for saving to be able to use the result outside the HMD
-*/
-
-/*
-
-use imagesFromURLs (used in screenstack) on https://vatelier.benetou.fr/MyDemo/newtooling/wiki_graph.json
-       and line-link-entities="target:#instructionA; source:#instructionC" between pages
-
-*/
-
-// see https://remote-keyboard.glitch.me on how to provide a remote keyboard (no BT) for hud keydown/keyup events
-	// consider alt server e.g 9000-peers-peerjsserver-bxw59h3fm87.ws-eu47.gitpod.io as peerjs isn't always reliable
-	// to do the same offline could add to express too, cf https://github.com/peers/peerjs-server#combining-with-existing-express-app
-//new Peer("2022xrkbd").on('connection', conn => conn.on('data', data => processRemoteInputData(data) ))
-const altServer = "9000-peers-peerjsserver-bxw59h3fm87.ws-eu47.gitpod.io" 
-//new Peer("2022xrkbd", {host: altServer}).on('connection', conn => conn.on('data', data => processRemoteInputData(data) ))
-// disabled for now
-function processRemoteInputData( data ){
-	// .status : keydown keyup pointermove
-		// on keydown or keyup, result un .key
-		// on pointermove, result un .x and .y
-
-	// could try to throw back as an event...
-	parseKeys( data.status, data.key )
-	if (data.status == "pointermove") parsePointer( data.x, data.y )
-}
-
-// for testing purposes, disable when not local with asset caching server
-// SSE on a specific route to know if this file was updated, if so reload (would force leave VR) cf Inventing on Principle
-/*
-const source = new EventSource("streaming");
-source.onmessage = message => { 
-		console.log(message.data) // showing the updates without manually forcing a reload
-		if ((JSON.parse(message.data)).status == "reload" ) location.reload(true); 
-	} ;
-*/
-// monitored server-side, index.js with fs
-
-/* extrusion and more generally compactness of 3D object description :
-
-	Constructive Solid Geometry  (CSG) https://openjscad.nodebb.com/topic/235/threejs-integration/11 as example of integration of JSCAD (modelling with code basically) with threejs, naively looks like an interesting intersection, ideally with spacial editing after (i.e pinching a vertex to update the resulting geometry)
-*/
-
-// consider PinePhone keyboard as something more usable that BT rollable
-	// PeerJS/WS(S) to share key.events
-	// would also work with iPad keyboard ... or another other device with keyboard and browser.
-
-// refactoring : consider pluggable execution models and targets e.g eval(), containers, Observable, etc
-	// right now all mashed up together so creates both complexity and security risk
-
-// consider also STT and translation experiment
-// Codex by OpenAI (cf EP account) https://beta.openai.com/account/api-keys stored on ~/.openai-codex-test-xr used via backend
-// with token e.g JWT could also consider ~/.bashrc ~/.bin or ~/Prototypes as commands
-	// esp. those allowing to integrate with specific hardware
-
-// load as page loads
-// <a-text target observablecell="targetid:observablehq-numberOfPages-835aa7e9" position="0 1.55 -0.2" scale="0.1 0.1 0.1"></a-text>
-// interactive
-// <a-text target value="jxr obsv observablehq-numberOfPages-835aa7e9" position="0 1.55 -0.2" scale="0.1 0.1 0.1"></a-text>
-
-function newNoteFromObservableCell( cell ){
-	var targetEl = document.querySelector("#"+cell)
-	var potentialRes = document.querySelector("#observablehq-numberOfPages-835aa7e9>span")
-	if (potentialRes && potentialRes.children[1]){
-	  addNewNote( potentialRes.children[1].innerText ) 
-		return
-	}
-
-	let observer = new MutationObserver(mutationRecords => {
-	  addNewNote( mutationRecords[0].addedNodes[0].children[1].innerText ) 
-	});
-
-	observer.observe(targetEl, {
-	  childList: true, // observe direct children
-	  subtree: true, // and lower descendants too
-	  characterDataOldValue: true // pass old data to callback
-	})
-}
-
-AFRAME.registerComponent('observablecell', { // non interactive mode
-  schema: {
-	  targetid: {type: 'string'}
-  },
-  init: function () {
-	var el = this.el
-	var targetEl = document.querySelector("#"+this.data.targetid)
-	let observer = new MutationObserver(mutationRecords => {
-	  addNewNote( mutationRecords[0].addedNodes[0].children[1].innerText )
-	});
-
-	observer.observe(targetEl, {
-	  childList: true, // observe direct children
-	  subtree: true, // and lower descendants too
-	  characterDataOldValue: true // pass old data to callback
-  });
-}})
-
-// might mess thing up on Quest somehow... like typing does not seem to work anymore since.
-
-/*
-const registerServiceWorker = async () => {
-  if ('serviceWorker' in navigator) {
-    try {
-      const registration = await navigator.serviceWorker.register(
-        'sw-test/sw.js',
-        {
-          scope: '',
-        }
-      );
-      if (registration.installing) {
-        console.log('Service worker installing');
-      } else if (registration.waiting) {
-        console.log('Service worker installed');
-      } else if (registration.active) {
-        console.log('Service worker active');
-      }
-    } catch (error) {
-      console.error(`Registration failed with ${error}`);
-    }
-  }
-};
-*/
-
-// 2 modes : interact/display (see the .hidableenvironment class)
-	// interact : small scale, 3D model of impact visible, keyboard visible, instruction visible
-	// display : changeable scale, everything but content not visible
-
-// could try new movements dedicated to modifying text, in particular dedicated to coding
-	// e.g replacing a word by an expression el sa color red => dropping qs elname on el => qs elname sa color red
-
-// for snapping display the current position (like now)
-	// and future position as transparency when within a certain radius to target + offset
-	// see getClosestTargetElement( pos ) when an object is already selected an moving
-	// only snap there if within certain distance
-
-// replace console with an in VR equivalent, at least during the try/catch of eval() to get some feedback
-
-function displaySnappablePositions( position ){
-	// to show while moving an object
-	// has to be close enough (below threshold)
-}
-
-function coloredBlocksFromScreens(colors, el){
-	// those are NOT updated at the moment
-	colors.map( (u,i) => {
-		var e = document.createElement("a-box")
-		e.setAttribute("color", u.split(" ")[1])
-		e.setAttribute("position",`2 1.8 -${i}`)
-		e.setAttribute("width","0.2")
-		e.setAttribute("depth","0.2")
-		el.appendChild(e)
-	})
-}
-
-function imagesFromURLs(urls, el, classes=null){
-	urls.map( (u,i) => {
-		var e = document.createElement("a-image")
-		if (u.indexOf("http")>-1)
-			e.setAttribute("src", u)
-		else
-			e.setAttribute("src", `screens/${u}`)
-		//e.setAttribute("position",`0 1.8 -${i}`)
-		e.setAttribute("position",`0 1.1 -${i/50}`) // flight mode
-		e.setAttribute("rotation",`-30 0 0`) // flight mode
-		e.setAttribute("scale", ".05 .05 .05") // have to scale down here otherwise move interactions aren't good
-		// could instead rely on https://github.com/visjs/vis-timeline
-		// as previously used  in https://mobile.twitter.com/utopiah/status/1110576751577567233
-		e.setAttribute("width","2")
-		if (classes) e.className += classes
-		
-		el.appendChild(e)
-		targets.push(e)
-	})
-}
-
-function URLs(urls, el){
-	urls.map( (u,i) => {
-		var e = document.createElement("a-text")
-		e.setAttribute("value", u.split(" ")[1])
-		e.setAttribute("position",`-1 1.25 -${i}`)
-		// incorrect as screens (and their average color) are done per minute but URL done per change of tab
-		//does not help, should be a text property instead 
-		// e.setAttribute("width","10")
-		e.setAttribute("text", "wrapCount","200")
-		// el.appendChild(e) // disabled in flight mode
-	})
-}
-
-function stringWithPositionFromCoordinates(pos){
-	var el = getClosestTargetElement( pos, 0.5 )
-	// loosen up the threshold as we normally pick from the top left
-
-	// assumes a lot :
-		// NO rotation of the text, at all!
-		// single line of text
-		// scale only of 1 depth and uniform scaling
-		// left aligned
-		// probably only positive values
-	var selectedGlyph = {}
-	selectedGlyph.index = -1 // if we get an empty string
-	selectedGlyph.element = el
-	if (!el) return selectedGlyph
-	var glyph = el.object3D.children[0].geometry.visibleGlyphs
-	const matches = glyph.map( (t,i) => {
-			return {
-				el: el,
-				dist : Math.abs( pos.x - (
-					el.object3D.position.x + t.position[0]/(150/el.object3D.scale.x) ) ),
-				index : i
-			}
-		})
-		.filter( t => t.dist < 0.5 )
-		.sort( (a,b) => a.dist - b.dist )
-		// https://twitter.com/utopiah/status/1532766336941686784
-	if (matches.length > 0) {
-		selectedGlyph.index = matches[0].index
-	}
-	return selectedGlyph
-}
-
-function plot(equation,variablename="x",scale=5,step=1){
-	// could delete the past one document.querySelector("#plot")
-	// but nice to compare curves... should rather avoid adding grids instead.
-	var plot = document.querySelector("#plot")
-	if (!plot){
-		plot = document.createElement("a-entity")
-		targets.push(plot) // adding only once
-		plot.setAttribute("position", "0 1.5 -.5") // convenient position to test on desktop
-		plot.setAttribute("scale", ".01 .01 .01")
-		var idx = 0
-		for (var i=-scale;i<=scale;i+=step){
-			xl = `start: ${-scale} ${i} 0; end : ${scale} ${i} 0; opacity: 1;`
-			// weirdest "trick"... something using only `` on setAttribute produces empty string
-			// but indirecting once by setting a variable make the following one work?!
-			plot.setAttribute("line__"+ ++idx, xl)
-			plot.setAttribute("line__"+ ++idx, `start: ${i} ${-scale} 0; end : ${i} ${scale} 0; opacity: 1;`)
-		}
-		xaxis = `start: ${-scale} 0 0; end : ${scale} 0 0; opacity: 1; color:white;`
-		plot.setAttribute("line__axis_x", xaxis)
-		plot.setAttribute("line__axis_y", `start: 0 ${-scale} 0; end : 0 ${scale} 0; opacity: 1; color:white;`)
-		plot.setAttribute("line__axis_z", `start: 0 0 ${-scale}; end : 0 0 ${scale}; opacity: 1; color:white;`)
-		plot.id = "plot"
-		AFRAME.scenes[0].appendChild( plot )
-	}
-	var previousPoint = null
-	var curveId = +Date.now()
-	idx = 0
-	for (var i=-scale;i<=scale;i+=step/10){
-		var pos = i + " " + eval( "x="+i +";"+ equation) + " .1"
-		if (previousPoint) {
-			plot.setAttribute("line__user"+curveId+"section"+ ++idx, 'start: ' + previousPoint+ '; end : ' + pos + '; color:red;')
-		}
-		previousPoint = pos
-	}
-	// variablename seems unused
-}
-
-AFRAME.registerComponent('target', {
-  init: function () {
-	targets.push( this.el )
-	this.el.classList.add("collidable")
-  }
-})
-
-AFRAME.registerComponent('line-link-entities', {
-  schema: {
-    source: {type: 'selector'},
-    target: {type: 'selector'},
-    steps: {type: 'number', default: 1},
-  },
-  init: function () {
-    let generatorName = this.attrName
-    setTimeout( _ => { // stupid... but works. 
- 	    if (!this.data.source || !this.data.target) return
-	    var sourcePos = this.data.source.object3D.position
-	    var targetPos = this.data.target.object3D.position
- 	    if (!sourcePos || !targetPos) return // might not be needed anymore
-	    // adding a gltf inside an element prevents the parent from having coordinates (fast enough?)
-	    var step = 0
-	    var points = cut ([sourcePos, targetPos], 0, ++step)
-	    points = cut (points, 0, ++step)
-	    points = cut (points, points.length-2, step)
-	    var el = this.el
-	    el.className += generatorName
-	    points.map( (p,i,arr) => {
-	      if (arr[i+1])
-		el.setAttribute("line__"+i, "start:" + AFRAME.utils.coordinates.stringify( arr[i] ) + ";end: " +  AFRAME.utils.coordinates.stringify( arr[i+1] ) )      
-	    })
-    }, 100 ) // could check instead if both elements have loaded
-    
-    function cut(points, pos, step){
-      var a = points[pos]
-      var b = points[pos+1]
-      var midPos = new THREE.Vector3()
-      midPos.copy(a).add(b).divideScalar(2)
-      midPos.z -= a.distanceTo(b)/(step*10) // smoothed out but axis aligned
-      return [...points.slice(0,pos+1), midPos, ...points.slice(pos+1)]
-    }
-  }
-});
-
-function tryCachedImageOtherwiseRenderLive(pages){
-	let urls = []
-	pages.map( i => {
-		let cached = baseCachedURL + i.group + "_" + i.name + imageExtension
-		urls.push( cached )
-		fetch( cached).then( res => res.status ).then( r => { if (r==404) 
-			// console.log("try to get new one", r, cached)
-			replaceCachedImageByLive(i.group, i.name)
-		} )
-	})
-	return urls
-}
-
-function replaceCachedImageByLive(group, name){
-	const live = baseLiveURL+group+"_"+name+imageExtension
-	fetch( live ).then( res => res.status ).then( r => {
-		if (r==200) 
-		// check if in the "new" cache before doing a live query first
-			document.querySelector("[src='"+baseCachedURL+group+"_"+name+imageExtension+"']")
-				.setAttribute("src", live)
-		else
-			fetch( queryFormatBaseURL+group+"/"+name+renderSuffix ).then( res => res.json() )
-			.then( document.querySelector("[src='"+baseCachedURL+group+"_"+name+imageExtension+"']")
-				.setAttribute("src", live)
-			)
-	} )
-}
-
-AFRAME.registerComponent('screenstack', {
-// this could be potentially be replaced with web-url
-  init: function () {
-	//load()
-	//if (cabin && cabin.length > 0) return // test doesn't seem to work well on new page / 1st load
-		  // see CEREMA project, seems to handle caching better
-	var el = this.el
-	let generatorName = this.attrName
-	fetch(wikiAsImages).then(response => response.json()).then(data =>
-		imagesFromURLs(
-			tryCachedImageOtherwiseRenderLive(
-				Object.entries(data.Nodes).map(( [k, v] ) => { return {group:v.Group, name:v.Label} } ).slice(0,maxItems)
-			)
-		, el, generatorName )
-	)
-	// example time sorting
-	/* fetch('/screens').then(response => response.json()).then(data => console.log(
-		  data.files.filter( i => i.indexOf("_000") < 0 ).map( i => Number(i.replace(".png", "")) ).filter( i => i > now-60 ) 
-	) )
-        */
-
-	// works only locally for privacy reasons.
-	//fetch('colors.txt').then(response => response.text()).then(data => coloredBlocksFromScreens(data.split("\n").splice(-maxItems), el))
-	// timings should match as colors are generated from the screens
-
-	//fetch('currentURL.txt').then(response => response.text()).then(data => URLs(data.split("\n").splice(-maxItems), el ))
-	// could slice the array based on dates and e.g limit on current day or last 24hrs
-  }
-});
-
-function getClosestTargetElements( pos, threshold=0.05 ){ 
-	// TODO Bbox intersects rather than position
-	return targets.filter( e => e.getAttribute("visible") == true).map( t => { return { el: t, dist : pos.distanceTo(t.getAttribute("position") ) } })
-		.filter( t => t.dist < threshold ) 
-		.sort( (a,b) => a.dist > b.dist)
-}
-
-function getClosestTargetElement( pos, threshold=0.05 ){ // 10x lower threshold for flight mode
-	var res = null
-	const matches = getClosestTargetElements( pos, threshold)
-	if (matches.length > 0) res = matches[0].el
-	return res
-}
-	
-/*
-alternatively could looks for the intersecting bounding boxes of all targets
-then from those pick the closest one (again based on center)
-
-Both work well... but without any depth/thickness the chance of intersection are null...
-extruding the plane to a volume on a known axis, e.g z here (no rotation) is trivial but limiting.
-
-Could rely on the bounding sphere instead but not ideal when text is beside other pieces of text
-
-Note that in practice we plan to bring geometry with the text, a la Scratch, to showcase grammar and potential to combine.
-Consequently those problems would probably go away by intersecting with that geometry instead.
-
-That still means an efficient solution, e.g convex hull or BVH
-*/
-
-// e.g addBackgroundBoxToTextElements( targets.filter( e => e.localName == "a-text" ) )
-// note that background is "just" for the user in the sense that an invisible bounding box is enough for interactions
-function addBackgroundBoxToTextElements( textElements ){
-	textElements.map( el => {
-
-		addBoundingBoxToTextElement( el )
-
-		var bbox = new THREE.Box3().setFromObject( el.object3D.children[0] )
-			// the text element itself has no volume whereas its first children is a mesh
-		var scale = el.getAttribute("scale").x // assume being uniform
-		var box = document.createElement("a-box")
-		el.appendChild( box )
-		box.setAttribute("width", (bbox.max.x - bbox.min.x) * 1/scale)
-		box.setAttribute("height", (bbox.max.y - bbox.min.y) * 1/scale)
-		box.setAttribute("depth", scale)
-		box.setAttribute("position", (bbox.max.x - bbox.min.x) * (1/scale) / 2 + " 0 " + -scale/2+0.0001 )
-
-		setTimeout( _ => { // AFrame induced delay
-			// should check instead how to make sure an object is indeed created.
-				// maybe via el.getObject3D()
-			var compoundbbox = new THREE.Box3().setFromObject( box.object3D )
-			compoundbbox.expandByObject( el.object3D )
-			var helperbox = new THREE.BoxHelper( box.object3D, 0x00ff00);
-			helperbox.update();
-			AFRAME.scenes[0].object3D.add(helperbox);
-			/*
-			var helpercompound = new THREE.BoundingBoxHelper( compoundbbox, 0x0000ff);
-			helpercompound.update();
-			AFRAME.scenes[0].object3D.add(helpercompound);
-			*/
-		}, 100)
-	})
-}
-
-function addBoundingBoxToTextElement( el ){
-	var meshEl = el.object3D.children.filter( e => (e.type == "Mesh") )[0]
-	var helper = new THREE.BoxHelper(meshEl, 0xff0000);
-		// otherwise doesn't work with icon...
-	helper.update();
-	AFRAME.scenes[0].object3D.add(helper);
-	el.setAttribute("box-uuid", helper.uuid )
-	groupHelpers.push( helper )
-}
-
-function removeBoundingBoxToTextElement( el ){
-	var uuid = el.getAttribute("box-uuid")
-	el.removeAttribute("box-uuid")
-	//AFRAME.scenes[0].object3D.traverse( e => { if (e.uuid == uuid) e.removeFromParent() })
-	//AFRAME.scenes[0].object3D.traverse( e => { if (e.uuid == uuid) AFRAME.scenes[0].object3D.remove(e) })
-	AFRAME.scenes[0].object3D.traverse( e => { console.log(e.uuid == uuid) })
-	AFRAME.scenes[0].object3D.traverse( e => { if (e.uuid == uuid) console.log("found", e)})
-		// somehow removing did work before ...
-}
-
-function groupSelectionToNewNote(){
-	var text = ""
-	groupSelection.map( grpel => {
-		//removeBoundingBoxToTextElement( grpel )
-			// somehow fails...
-		text += grpel.getAttribute("value") + "\n"
-	})
-	groupHelpers.map( e => e.removeFromParent() )
-	groupHelpers = []
-	groupSelection = []
-	addNewNote( text )
-}
-
-function addToGroup( position ){
-	var el = getClosestTargetElement( position )
-	if (!el) return
-	groupSelection.push( el )
-	addBoundingBoxToTextElement( el )
-}
-
-function appendToFeedbackHUD(txt){
-	setFeedbackHUD( document.querySelector("#feedbackhud").getAttribute("value") + " " + txt )
-}
-
-function setFeedbackHUD(txt){
-	document.querySelector("#feedbackhud").setAttribute("value",txt)
-	setTimeout( _ => document.querySelector("#feedbackhud").setAttribute("value","") , 2000) 
-}
-
-function appendToHUD(txt){
-	const textHUD = document.querySelector("#typinghud").getAttribute("value") 
-	if ( textHUD == startingText)
-		setHUD( txt )
-	else
-		setHUD( textHUD + txt )
-}
-
-function setHUD(txt){
-	document.querySelector("#typinghud").setAttribute("value",txt)
-}
-
-AFRAME.registerComponent('waistattach',{
-  schema: {
-    target: {type: 'selectorAll'},
-  },
-  init: function () {
-	var el = this.el
-	this.worldPosition=new THREE.Vector3();
-  },
-  tick: function () {
-	var worldPosition=this.worldPosition;
-	worldPosition.copy(this.el.object3D.position);this.el.object3D.parent.updateMatrixWorld();this.el.object3D.parent.localToWorld(worldPosition)
-	Array.from( this.data.target ).map( t => {
-		t.object3D.position.x = worldPosition.x
-		t.object3D.position.z = worldPosition.z
-	})
-  },
-});
-
-AFRAME.registerComponent('attach',{
-  schema: {
-    target: {type: 'selector'},
-  },
-  init: function () {
-	var el = this.el
-	this.worldPosition=new THREE.Vector3();
-  },
-  tick: function () {
-	  var worldPosition=this.worldPosition;
-	  worldPosition.copy(this.el.position);
-	  this.el.parent.updateMatrixWorld();
-	  this.el.parent.localToWorld(worldPosition)
-	  rotation = this.el.rotation.x*180/3.14 + " " + this.el.rotation.y*180/3.14 + " " + this.el.rotation.z*180/3.14
-	  this.data.target.setAttribute("rotation", rotation)
-	  this.data.target.setAttribute("position",
-		  AFRAME.utils.coordinates.stringify( worldPosition ) )
-  },
-  remove: function() {
-  }
-});
-
-AFRAME.registerComponent('wristattachsecondary',{
-  schema: {
-    target: {type: 'selector'},
-  },
-  init: function () {
-	var el = this.el
-	this.worldPosition=new THREE.Vector3();
-  },
-  tick: function () {
-	// could check if it exists first, or isn't 0 0 0... might re-attach fine, to test
-		  // somehow very far away... need to convert to local coordinate probably
-		  // localToWorld?
-	(primarySide == 0) ? secondarySide = 1 : secondarySide = 0
-	var worldPosition=this.worldPosition;
-	this.el.object3D.traverse( e => { if (e.name == "wrist") {
-		worldPosition.copy(e.position);e.parent.updateMatrixWorld();e.parent.localToWorld(worldPosition)
-		rotation = e.rotation.x*180/3.14 + " " + e.rotation.y*180/3.14 + " " + e.rotation.z*180/3.14
-		this.data.target.setAttribute("rotation", rotation)
-		this.data.target.setAttribute("position",
-				AFRAME.utils.coordinates.stringify( worldPosition ) )
-			  // doesnt work anymore...
-		//this.data.target.setAttribute("rotation", AFRAME.utils.coordinates.stringify( e.getAttribute("rotation") )
-	  }
-	})
-  },
-  remove: function() {
-	// should remove event listeners here. Requires naming them.
-  }
-});
-
-AFRAME.registerComponent('pinchsecondary', { 
-  init: function () {
-	this.el.addEventListener('pinchended', function (event) {
-		selectedElement = getClosestTargetElement( event.detail.position )
-		selectedElements.push({element:selectedElement, timestamp:Date.now(), primary:false})
-		// if close enough to a target among a list of potential targets, unselect previous target then select new
-		if (selectedElement) interpretJXR( selectedElement.getAttribute("value") )
-		selectedElement = null
-		if (setupMode) setupBBox["B"] = event.detail.position
-		if ( setupBBox["A"] && setupBBox["B"] ) {
-			setupMode = false
-			setFeedbackHUD( JSON.stringify(setupBBox))
-		}
-		/*
-		selectionPinchMode = false
-		setHUD( AFRAME.utils.coordinates.stringify( bbox.min ),
-			AFRAME.utils.coordinates.stringify( bbox.max ) )
-		bbox.min.copy( zeroVector3 )
-		bbox.man.copy( zeroVector3 )
-	       */
-	});
-	this.el.addEventListener('pinchmoved', function (event) {
-		if (selectionPinchMode){
-			bbox.min.copy( event.detail.position )
-			setFeedbackHUD( "selectionPinchMode updated min")
-			if (!bbox.max.equal(zeroVector3))
-				selectionBox.update();
-		}
-	});
-	this.el.addEventListener('pinchstarted', function (event) {
-		if (!selectionPinchMode) bbox.min.copy( zeroVector3 )
-		if (selectionPinchMode) setFeedbackHUD( "selectionPinchMode started")
-	});
-  },
-  remove: function() {
-	// should remove event listeners here. Requires naming them.
-  }
-});
-
-AFRAME.registerComponent('pinchprimary', { // currently only 1 hand, the right one, should be switchable
-
-// consider instead https://github.com/AdaRoseCannon/handy-work/blob/main/README-AFRAME.md for specific poses
-// or https://aframe.io/aframe/examples/showcase/hand-tracking/pinchable.js 
-
-  init: function () {
-	var el = this.el
-	this.el.addEventListener('pinchended', function (event) { 
-		// if positioned close enough to a target zone, trigger action
-			// see own trigger-box component. Could use dedicated threejs helpers instead.
-				// https://github.com/Utopiah/aframe-triggerbox-component/blob/master/aframe-triggerbox-component.js#L66
-			// could make trigger zones visible as debug mode
-		var closests = getClosestTargetElements( event.detail.position )
-		//if (closests && closests.length > 0) // avoiding self reference
-		//	setFeedbackHUD("close enough, could stack with "+ closests[1].el.getAttribute("value") )
-		var dist = event.detail.position.distanceTo( document.querySelector("#box").object3D.position )
-		if (dist < .1){
-			setFeedbackHUD("close enough, replaced shortcut with "+ selectedElement.getAttribute("value") )
-			wristShortcut = selectedElement.getAttribute("value")
-		}
-		if (selectedElement){
-			let content = selectedElement.getAttribute("value")
-			if (content && immersClient && immersClient.connected){
-				immersClient.place.location = {
-					position: AFRAME.utils.coordinates.stringify(event.detail.position),
-					rotation: AFRAME.utils.coordinates.stringify( selectedElement.getAttribute("rotation") )
-				};
-				immersClient.sendChatMessage(content, "public"); 
-			}
-			selectedElements.push({element:selectedElement, timestamp:Date.now(), primary:true})
-			selectedElement.emit('released')
-		}
-		// unselect current target if any
-		selectedElement = null;
-		save()
-		if (setupMode) setupBBox["A"] = event.detail.position
-			// somehow keeps on setting up... shouldn't once done.
-		if ( setupBBox["A"] && setupBBox["B"] ) {
-			setupMode = false
-			setFeedbackHUD( JSON.stringify(setupBBox))
-		}
-		if ( drawingMode ) draw( event.detail.position )
-		if ( groupingMode ) addToGroup( event.detail.position )
-		selectionPinchMode = false
-		/*
-		setHUD( AFRAME.utils.coordinates.stringify( bbox.min ),
-			AFRAME.utils.coordinates.stringify( bbox.max ) )
-		bbox.min.copy( zeroVector3 )
-		bbox.man.copy( zeroVector3 )
-	       */
-		setTimeout( _ => primaryPinchStarted = false, 200) // delay otherwise still activate on release
-	
-		var newPinchPos = new THREE.Vector3()
-		newPinchPos.copy(event.detail.position )
-		pinches.push({position:newPinchPos, timestamp:Date.now(), primary:true})
-		dl2p = distanceLastTwoPinches()
-
-	});
-	this.el.addEventListener('pinchmoved', function (event) { 
-		// move current target if any
-		if (selectionPinchMode){
-			bbox.max.copy( event.detail.position )
-			if (!bbox.min.equal(zeroVector3))
-				selectionBox.update();
-		}
-		if (selectedElement && !groupingMode) {
-			selectedElement.setAttribute("position", event.detail.position)
-			document.querySelector("#rightHand").object3D.traverse( e => {
-				if (e.name == "ring-finger-tip"){
-					selectedElement.object3D.rotation.copy( e.rotation )
-				}
-			})
-			// rotation isn't ideal with the wrist as tend not have wrist flat as we pinch
-		}
-		if (selectedElement) selectedElement.emit("moved")
-	});
-	this.el.addEventListener('pinchstarted', function (event) {
-		primaryPinchStarted = true
-		if (!selectionPinchMode) bbox.max.copy( zeroVector3 )
-
-		//var clone = getClosestTargetElement( event.detail.position ).cloneNode()
-		// might want to limit cloning to unmoved element and otherwise move the cloned one
-		//AFRAME.scenes[0].appendChild( clone )
-		//targets.push( clone )
-		//selectedElement = clone
-
-		selectedElement = getClosestTargetElement( event.detail.position )
-		if (selectedElement) selectedElement.emit("picked")
-		// is it truly world position? See https://github.com/aframevr/aframe/issues/5182
-		// setFeedbackHUD( AFRAME.utils.coordinates.stringify( event.detail.position ) )
-		// if close enough to a target among a list of potential targets, unselect previous target then select new
-	});
-  },
-  remove: function() {
-	// should remove event listeners here. Requires naming them.
-  }
-});
-
-// testing on desktop
-function switchToWireframe(){
-	visible = !visible
-	/*
-	targets.map( e => {
-			scale = 50// should be a variable instead
-			e.setAttribute("scale", visible ? ".05 .05 .05" : ".1 .1 .1" )
-			var pos = AFRAME.utils.coordinates.parse( e.getAttribute("position") )
-			//visible ? pos.z *= scale : pos.z /= scale // might be the opposite but anyway give the principle
-			e.setAttribute("position", AFRAME.utils.coordinates.stringify(pos))
-			// should actually be just for src, not for text notes... even though could be interesting
-	})
-	*/
-	var model = document.querySelector("#environment").object3D
-	model.traverse( o => { if (o.material) {
-			o.material.wireframe = visible;
-			o.material.opacity = visible ? 0.05 : 1;
-			o.material.transparent = visible;
-	} })
-}
-
-// add (JXR) shortcuts as PIM function from e.g https://observablehq.com/@utopiah/from-pim-to-2d-to-3d-to-xr-explorations
-	// allowing to search within PIM then show manipulable pages as preview.
-
-// note that can be tested in VR also as jxr switchToWireframe()
-	// could make for nice in VR testing setup as eved notes
-
-function enterSetupMode(){
-	// rely on 2 pinches to create a bounding box of safe interaction
-	// https://threejs.org/docs/#api/en/math/Box3.containsBox
-	setupMode = true
-}
-
-AFRAME.registerComponent('start-on-press', {
-	// should become a property of the component instead to be more flexible.
-	init: function(){
-		var el = this.el
-		this.el.addEventListener('pressedended', function (event) { 
-			if (!primaryPinchStarted && wristShortcut.match(prefix)) interpretJXR(wristShortcut)
-			// other action could possibly based on position relative to zones instead, i.e a list of bbox/functions pairs
-		})
-	}
-})
-//---- other components : ------
-// could become like https://twitter.com/utopiah/status/1264131327269502976
-	// can include a mini typing game to warm up finger placement
-
-function distanceLastTwoPinches(){
-	let dist = null
-	if (pinches.length>1){
-		dist = pinches[pinches.length-1].position.distanceTo( pinches[pinches.length-2].position )
-	}
-	return dist
-}
-
-function startSelectionVolume(){
-	selectionPinchMode = true
-	// see setupBBox in pinchprimary and pinchsecondary
-	// then addBoundingBoxToTextElement()
-}
-// note that the bbox with vertical position model is still interesting
-	// (if within bounding box, try to execute code)
-	// because it allows grouping and sequentially rather executing line by line
-	// see https://threejs.org/docs/#api/en/math/Box3.containsBox
-
-// save pose of targets and src locally and if available on PIM
-/*
-savingJSON = targets.map( e => {
-	rot : e.getAttribute("rotation"),
-	pos : e.getAttribute("position"), 
-	scale : e.getAttribute("scale"), 
-	src : e.getAttribute("src"), 
-	value : e.getAttribute("value"), 
-})
-*/
-// load alt set of items e.g from https://observablehq.com/@utopiah/from-pim-to-2d-to-3d-to-xr-explorations
-	// or https://fabien.benetou.fr/pub/home/pimxr-experimentation/sources.json
-
-// position should be configurable as rotation is handled by the OS
-
-function parsePointer( x,y ){
-		console.log(x,y)
-	if (!sketchEl) {
-		sketchEl = document.createElement("a-entity")
-		// sketchEl.setAttribute("position", "0 1.4 -0.3") otherwise lines don't align
-			// could counter that offset but might be problematic later on with translations/rotations
-		targets.push( sketchEl )
-		AFRAME.scenes[0].appendChild(sketchEl)
-	}
-	var el = document.createElement("a-sphere")
-	var pos = x/1000 + " " + y/1000 + " 0"
-		// should offset and flip properly
-	el.setAttribute("position", pos)
-	el.setAttribute("radius", 0.01)
-	el.setAttribute("color", "green")
-	sketchEl.appendChild( el )
-	if (lastPointSketch){
-		var oldpos = AFRAME.utils.coordinates.stringify( lastPointSketch.getAttribute("position") )
-		sketchEl.setAttribute("line__"+ Date.now(), `start: ${oldpos}; end : ${pos};`)
-	}
-	lastPointSketch = el
-	
-}
-
-function parseKeys(status, key){
-	var e = hudTextEl
-	if (status == "keyup"){
-		if (key == "Control"){
-			groupingMode = false
-			groupSelectionToNewNote()
-		}
-	}
-	if (status == "keydown"){
-		var txt = e.getAttribute("value") 
-		if (txt == "[]") 
-			e.setAttribute("value", "")
-		if (key == "Backspace" && txt.length)
-			e.setAttribute("value", txt.slice(0,-1))
-		if (key == "Control")
-			groupingMode = true
-		if (key == "Shift" && selectedElement)
-			e.setAttribute("value", selectedElement.getAttribute("value") )
-		else if (key == "Enter") {
-			if ( selectedElement ){
-				var clone = selectedElement.cloneNode()
-				clone.setAttribute("scale", "0.1 0.1 0.1")  // somehow lost
-				AFRAME.scenes[0].appendChild( clone )
-				targets.push( clone )
-				selectedElement = clone
-			} else {
-				if (txt.match(prefix)) interpretJXR(txt)
-				// check if text starts with jxr, if so, also interpret it.
-				addNewNote(e.getAttribute("value"))
-				e.setAttribute("value", "")
-			}
-		} else {
-		// consider also event.ctrlKey and multicharacter ones, e.g shortcuts like F1, HOME, etc
-			if (key.length == 1)
-				e.setAttribute("value", e.getAttribute("value") + key )
-		}
-		save()
-	}
-}
-
-var keyboardInputTarget = 'hud'
-AFRAME.registerComponent('hud', {
-	init: function(){
-		var feedbackHUDel= document.createElement("a-troika-text")
-		feedbackHUDel.id = "feedbackhud"
-		feedbackHUDel.setAttribute("value", "")
-		feedbackHUDel.setAttribute("position", "-0.05 0.01 -0.2") 
-		feedbackHUDel.setAttribute("scale", "0.05 0.05 0.05") 
-		this.el.appendChild( feedbackHUDel )
-		var typingHUDel = document.createElement("a-troika-text")
-		typingHUDel.id = "typinghud"
-		typingHUDel.setAttribute("value", startingText)
-		typingHUDel.setAttribute("position", "-0.05 0 -0.2") 
-		typingHUDel.setAttribute("scale", "0.05 0.05 0.05") 
-		this.el.appendChild( typingHUDel )
-		hudTextEl = typingHUDel // should rely on the id based selector now
-		document.addEventListener('keyup', function(event) {
-			if (keyboardInputTarget != 'hud') return
-			parseKeys('keyup', event.key)
-		});
-		document.addEventListener('keydown', function(event) {
-			if (keyboardInputTarget != 'hud') return
-			parseKeys('keydown', event.key)
-		});
-	}
-})
-
-function addNewNote( text, position=`-0.2 1.1 -0.1`, scale= "0.1 0.1 0.1", id=null, classes="notes", visible="true", rotation="0 0 0" ){
-	var newnote = document.createElement("a-troika-text")
-	newnote.setAttribute("anchor", "left" )
-	newnote.setAttribute("outline-width", "5%" )
-	newnote.setAttribute("outline-color", "black" )
-	newnote.setAttribute("visible", visible )
-
-	if (id) 
-		newnote.id = id
-	else
-		newnote.id = "note_" + Date.now() // not particularly descriptive but content might change later on
-	if (classes)
-		newnote.className += classes
-	newnote.setAttribute("side", "double" )
-	var userFontColor = AFRAME.utils.getUrlParameter('fontcolor')
-	if (userFontColor && userFontColor != "") 
-		newnote.setAttribute("color", userFontColor )
-	else 
-		newnote.setAttribute("color", fontColor )
-	if (text.match(prefix))
-		newnote.setAttribute("color", codeFontColor )
-	newnote.setAttribute("value", text )
-	//newnote.setAttribute("font", "sw-test/Roboto-msdf.json")
-	newnote.setAttribute("position", position)
-	newnote.setAttribute("rotation", rotation)
-	newnote.setAttribute("scale", scale)
-	AFRAME.scenes[0].appendChild( newnote )
-	targets.push(newnote)
-	return newnote
-}
-
-function interpretAny( code ){
-
-	if (!code.match(/^dxr /)) return
-	var newcode = code
-	newcode = newcode.replace("dxr ", "")
-	//newcode = newcode.replace(/bash ([^\s]+)/ ,`debian '$1'`) // syntax delegated server side
-	fetch("/command?command="+newcode).then( d => d.json() ).then( d => {
-		console.log( d.res )
-		appendToHUD( d.res ) // consider shortcut like in jxr to modify the scene directly
-		// res might return that said language isn't support
-			// commandlistlanguages could return a list of supported languages
-	})
-}
-
-var pastPoints = []
-function draw( position ){
-	let drawingMoment = +Date.now() // might not be fast enough to get a UUID
-	let uniqueId = Date.now().toString(36) + Math.random().toString(36).substring(2);
-	// from https://stackoverflow.com/a/44078785/1442164
-	let pos = AFRAME.utils.coordinates.stringify( position )
-	// add sphere per point
-	let el = document.createElement("a-sphere")
-	let drawing
-	el.setAttribute("position", pos)
-	el.setAttribute("radius", 0.001)
-	el.setAttribute("color", "lightblue")
-	el.setAttribute("dateadded", drawingMoment )
-	// if previous point exist, draw line between both
-	if (pastPoints.length) {
-		let previousPoint = pastPoints[pastPoints.length-1] // should check time, e.g max 1s
-		drawing = previousPoint.element.parentElement
-		let oldpos = AFRAME.utils.coordinates.stringify( previousPoint.position )
-		drawing.setAttribute("line__"+ uniqueId, `start: ${oldpos}; end : ${pos};`)
-	} else {
-		drawing = document.createElement("a-entity")
-		drawing.className = "drawing"
-		AFRAME.scenes[0].appendChild( drawing )
-	}
-	drawing.appendChild( el )
-	// if sufficiently close to another sphere (the first) close the loop
-	if (pastPoints.length>1) {
-		let lastPoint = pastPoints[pastPoints.length-1]
-		let oldpos = AFRAME.utils.coordinates.stringify( lastPoint.position )
-		let lastPosV3 = new THREE.Vector3().copy( lastPoint.position )
-		if (lastPosV3.distanceTo( position ) < 0.1) // threshold
-			drawing.setAttribute("line__"+ drawingMoment + "_closeloop", `start: ${oldpos}; end : ${pos};`)
-			// then enter extrude mode (assume they are on 1 plane)
-			// should also prevent from adding points to the current drawing
-			// before investing too much effort in this, should consider how it would actually improve usage
-			// especially as we can add AFrame primitives with the keyboard
-				// intersection of kbd and hand tracked 6DoF being the primary usage
-	}
-
-	pastPoints.push({position:pos, element:el, timestamp: drawingMoment})
-	/* test values, must wait .1 second between otherwise there is no known position
-		(most likely AFrame to threejs delay)
-	draw( new THREE.Vector3(-0.04, 1.7, -1) );
-	draw( new THREE.Vector3(0.04, 1.7, -1) );
-	draw( new THREE.Vector3(0, 1.72, -1) );
-	*/
-
-
-}
-
-// the goal is to associate objects as shape with volume to code snippet
-function addGltfFromURLAsTarget( url, scale=1, position="0 1.7 -0.3" ){
-	var el = document.createElement("a-entity")
-	AFRAME.scenes[0].appendChild(el)
-	el.setAttribute("gltf-model", url)
-	el.setAttribute("position", position) 
-	el.setAttribute("scale", scale + " " + scale + " " + scale)
-	targets.push(el)
-
-	return el
-	// consider https://sketchfab.com/developers/download-api/downloading-models/javascript
-}
-
-function showhistory(){
-	setFeedbackHUD("history :\n")
-	commandhistory.map( i => appendToHUD(i.uninterpreted+"\n") )
-}
-
-function saveHistoryAsCompoundSnippet(){
-	addNewNote( commandhistory.map( e => e.uninterpreted ).join("\n") )
-}
-
-function bindVariableValueToNewNote(variableName){
-	// from observe jxr keyword
-	const idName = "bindVariableValueToNewNote"+variableName
-	addNewNote( variableName + ":" + eval(variableName), `-0.15 1.4 -0.1`,  "0.1 0.1 0.1", idName, "observers", "true" )
-	// could add to the HUD instead and have a list of these
-	return setInterval( _ => {
-		const value = variableName+";"+eval(variableName)
-		// not ideal for DOM elements, could have shortcuts for at least a-text with properties, e.g value or position
-		document.getElementById(idName).setAttribute("value", value)
-	}, 100 )
-}
-
-function parseJXR( code ){
-// should make reserved keywords explicit.
-	var newcode = code
-	newcode = newcode.replace("jxr ", "")
-	newcode = newcode.replace(/(\d)s (.*)/ ,`setTimeout( _ => { $2 }, $1*1000)`)
-
-	// qs X => document.querySelector("X")
-	newcode = newcode.replace(/qs ([^\s]+)/ ,`document.querySelector('$1')`)
-
-	// sa X Y => .setAttribute("X", "Y")
-	newcode = newcode.replace(/ sa ([^\s]+) (.*)/,`.setAttribute('$1','$2')`)
-		// problematic for position as they include spaces
-
-	newcode = newcode.replace(/obsv ([^\s]+)/ ,`newNoteFromObservableCell('$1')`)
-
-	// TODO
-	//<a-text target value="jxr observe selectedElement" position="0 1.25 -0.2" scale="0.1 0.1 0.1"></a-text>
-	newcode = newcode.replace(/observe ([^\s]+)/,`bindVariableValueToNewNote('$1')`)
-	// could proxy instead... but for now, the quick and dirty way :
-
-	// e.g qs a-sphere sa color red => 
-	// document.querySelector("a-sphere").setAttribute("color", "red")
-
-	newcode = newcode.replace(/lg ([^\s]+) ([^\s]+)/ ,`addGltfFromURLAsTarget('$1',$2)`)
-	// order matters, here we only process the 2 params if they are there, otherwise 1
-	newcode = newcode.replace(/lg ([^\s]+)/ ,`addGltfFromURLAsTarget('$1')`)
-	return newcode
-}
-
-function interpretJXR( code ){
-	if (!code) return
-	if (code.length == 1) { // special case of being a single character, thus keyboard
-		if (code == ">") { // Enter equivalent
-			content =  hudTextEl.getAttribute("value") 
-			if (Number.isFinite(Number(content))) {
-				loadPageRange(Number(content));
-			} else {
-				addNewNote( content )
-			}
-			setHUD("")
-		} else if (code == "<") { // Backspace equivalent
-			setHUD( hudTextEl.getAttribute("value").slice(0,-1))
-		} else {
-			appendToHUD( code )
-		}
-	}
-	if (!code.match(prefix)) return
-	var uninterpreted = code
-	var parseCode = ""
-	code.split("\n").map( lineOfCode => parseCode += parseJXR( lineOfCode ) + ";" )
-	// could ignore meta code e.g showhistory / saveHistoryAsCompoundSnippet
-	commandhistory.push( {date: +Date.now(), uninterpreted: uninterpreted, interpreted: parseCode} )
-	
-	console.log( parseCode )
-	try {
-		eval( parseCode )
-	} catch (error) {
-		console.error(`Evaluation failed with ${error}`);
-	}
-
-	// unused keyboard shortcuts (e.g BrowserSearch) could be used too
-	// opt re-run it by moving the corresponding text in target volume
-}
-
-AFRAME.registerComponent('toolbox', { // ununsed
-	init: function(){
-		var el = this.el
-		var e = document.createElement("a-sphere")
-		e.setAttribute("scale", "0.1 0.1 0.1")
-		e.setAttribute("color", "lightblue")
-		e.setAttribute("pressable")
-		e.id = "toolboxsphere"
-		el.appendChild( e )
-		var e = document.createElement("a-cylinder")
-		e.setAttribute("scale", "0.1 0.1 0.1")
-		e.setAttribute("color", "darkred")
-		e.setAttribute("pressable")
-		e.id = "toolboxcylinder"
-		el.appendChild( e )
-		var e = document.createElement("a-box")
-		e.setAttribute("scale", "0.1 0.1 0.1")
-		e.setAttribute("color", "pink")
-		e.setAttribute("pressable")
-		e.id = "toolbox"
-		el.appendChild( e )
-	},
-	tick: function(){
-		var toolbox = document.querySelector("#toolbox")
-		var cam = document.querySelector("[camera]")
-		toolbox.object3D.position.x = cam.getAttribute("position").x-0.5
-		toolbox.object3D.position.z = cam.getAttribute("position").z+0.2
-		//toolbox.object3D.rotation.y = cam.getAttribute("rotation").y
-	}
-})
-
-// from https://aframe.io/aframe/examples/showcase/hand-tracking/pressable.js
-AFRAME.registerComponent('pressable', {
-	schema:{pressDistance:{default:0.06}},
-	init:function(){this.worldPosition=new THREE.Vector3();this.handEls=document.querySelectorAll('[hand-tracking-controls]');this.pressed=false;},
-	tick:function(){var handEls=this.handEls;var handEl;var distance;for(var i=0;i<handEls.length;i++){handEl=handEls[i];distance=this.calculateFingerDistance(handEl.components['hand-tracking-controls'].indexTipPosition);if(distance<this.data.pressDistance){if(!this.pressed){this.el.emit('pressedstarted');} this.pressed=true;return;}} if(this.pressed){this.el.emit('pressedended');} this.pressed=false;},
-	calculateFingerDistance:function(fingerPosition){var el=this.el;var worldPosition=this.worldPosition;worldPosition.copy(el.object3D.position);el.object3D.parent.updateMatrixWorld();el.object3D.parent.localToWorld(worldPosition);return worldPosition.distanceTo(fingerPosition);}
-});
-
-AFRAME.registerComponent('selectionboxonpinches', {
-	init:function(){
-		AFRAME.scenes[0].object3D.add(selectionBox);
-	}
-})
-
-AFRAME.registerComponent('keyboard', {
-	init:function(){
-		let generatorName = this.attrName
-		const horizontaloffset = .7
-		const horizontalratio = 1/20
-		alphabet.map( (line,ln) => {
-		 for (var i = 0; i < line.length; i++) {
-			var pos = i * horizontalratio - horizontaloffset
-                        addNewNote( line[i], pos+" "+(1.6-ln*.06)+" -.4", ".1 .1 .1", null, generatorName)
-		 }
-		})
-	}
-})
-	
-AFRAME.registerComponent('capturegesture', {
-	init:function(){this.handEls=document.querySelectorAll('[hand-tracking-controls]');},
-	tick:function(){
-		document.querySelector("#rightHand").object3D.traverse( e => { if (e.name == "b_r_wrist") console.log("rw", e.rotation) })
-		document.querySelector("#leftHand" ).object3D.traverse( e => { if (e.name == "b_l_wrist") console.log("rl", e.rotation) })
-			// should look up thumb-metacarpal and index-finger-metacarpal if not sufficient
-				// might trickle down iif wrist rotation itself is already good
-			// https://immersive-web.github.io/webxr-hand-input/
-	}
-});
-
-AFRAME.registerComponent('timeline', {
-        init:function(){
-		let generatorName = this.attrName
-                fetch("../content/fot_timeline.json").then(res => res.json() ).then(res => {
-                        res.fot_timeline.slice(0,maxItemsFromSources).map( (c,i) => addNewNote( c.year+"_"+c.event, "1 "+i/10+" -1", ".1 .1 .1", null, generatorName) ) 
-                })
-        },
-});
-
-AFRAME.registerComponent('glossary', {
-	init:function(){
-		let generatorName = this.attrName
-		fetch("content/glossary.json").then(res => res.json() ).then(res => {
-			Object.values(res.entries).slice(0,maxItemsFromSources).map( (c,i) => addNewNote( c.phrase + c.entry.slice(0,50)+"..." , "-1 "+i/10+" -1", ".1 .1 .1", null, generatorName) ) 
-		})
-	},
-});
-
-AFRAME.registerComponent('fot', {
-	init:function(){
-		this.tick = AFRAME.utils.throttleTick(this.tick, 500, this);
-	},
-	tick: function(){
-		let generatorName = this.attrName
-		fetch("https://fabien.benetou.fr/PIMVRdata/FoT?action=source#" + Date.now()).then(res => res.text() ).then(res => {
-			res.split("\n").slice(0,maxItemsFromSources).map( (n,i) => {
-				found = added.find((str) => str === n)
-				if (typeof found === 'undefined'){
-					added.push(n)
-					addNewNote( n, "-1 "+(1+i/10)+" -2.5", ".1 .1 .1", null, generatorName ) 
-				}
-			})
-		})
-	}
-});
-
-AFRAME.registerComponent('issues', {
-	init:function(){
-		let generatorName = this.attrName
-		// fetch("https://api.github.com/repos/Utopiah/relax-plus-think-space/issues").then(res => res.json() ).then(res => {
-		fetch("https://git.benetou.fr/api/v1/repos/utopiah/text-code-xr-engine/issues").then(res => res.json() ).then(res => {
-			res.slice(0,maxItemsFromSources).map( (n,i) => addNewNote( n.title, "0 "+(1+i/10)+" -1.8", ".1 .1 .1", null, generatorName ) )
-		})
-	},
-});
-
-AFRAME.registerComponent('dynamic-view', {
-	init:function(){
-		let generatorName = this.attrName
-		fetch("content/DynamicView.json").then(res => res.json() ).then(res => {
-			res.nodes.slice(0,maxItemsFromSources).map( n => addNewNote( n.title, "" + res.layout.nodePositions[n.identifier].x/100 + " " + res.layout.nodePositions[n.identifier].y/100 + " -1", ".1 .1 .1", null, generatorName ) )
-		})
-	},
-});
-
-function toggleVisibilityEntitiesFromClass(classname){
-	let entities = Array.from( document.querySelectorAll("."+classname) )
-	if (entities.length == 0) return
-	let state = entities[0].getAttribute("visible") // assume they are all the same
-	if (state)
-		entities.map( e => e.setAttribute("visible", "false"))
-	else
-		entities.map( e => e.setAttribute("visible", "true"))
-}
-
-function pushLeftClass(classname, value=.1){
-	Array.from( document.querySelectorAll("."+classname) ).map( e => e.object3D.position.x -= value)
-}
-
-function pushRightClass(classname, value=.1){
-	Array.from( document.querySelectorAll("."+classname) ).map( e => e.object3D.position.x += value)
-}
-
-function pushUpClass(classname, value=.1){
-	Array.from( document.querySelectorAll("."+classname) ).map( e => e.object3D.position.y += value)
-}
-
-function pushDownClass(classname, value=.1){
-// can be used for accessibiliy, either directly or sampling e.g 10s after entering VR to lower based on the estimated user height
-	Array.from( document.querySelectorAll("."+classname) ).map( e => e.object3D.position.y -= value)
-}
-
-function pushBackClass(classname, value=.1){
-	Array.from( document.querySelectorAll("."+classname) ).map( e => e.object3D.position.z -= value)
-}
-
-function pushFrontClass(classname, value=.1){
-	Array.from( document.querySelectorAll("."+classname) ).map( e => e.object3D.position.z += value)
-}
-
-function toggleVisibilityAllGenerators(){
-	generators.split(" ").map( g => toggleVisibilityEntitiesFromClass(g) )
-	// not hidableassets though
-}
-
-function toggleVisibilityAll(){
-	toggleVisibilityAllGenerators()
-	toggleVisibilityEntitiesFromClass("hidableassets")
-}
-
-function toggleVisibilityAllButClass(classname){
-	generators.split(" ").filter( e => e != classname).map( g => toggleVisibilityEntitiesFromClass(g) )
-	toggleVisibilityEntitiesFromClass("hidableassets")
-}
-
-AFRAME.registerComponent('adjust-height-in-vr', {
-	init: function(){
-		AFRAME.scenes[0].addEventListener("enter-vr", _ => {
-			setTimeout( _ => { // getting the value right away returns 0, so short delay
-				userHeight = document.querySelector("#player").object3D.position.y
-				// assume the user does not change, some might prefer to use standing up first then sit down.
-					// otherwise explicit controls
-				heightAdjustableClasses.map( c => {
-					max = Math.max.apply(null, Array.from( document.querySelectorAll("."+c) ).map( e => e.object3D.position.y) )	
-					min = Math.min.apply(null, Array.from( document.querySelectorAll("."+c) ).map( e => e.object3D.position.y) )	
-					pushDownClass(c, userHeight - (max-min)/2 )
-					setFeedbackHUD( "adjusted height by:" + ( userHeight - (max-min)/2 ) )
-				} )
-			}, 100 )
-		})
-	}
-})
-
-AFRAME.registerComponent('commands-from-external-json', {
-/*
-// following discussion with Yanick
-
-// for cabin.html to faciliate growth and flexibility
-
-fetch('./commands.json') // then load like A-Frame elements
-// e.g command //{name,defaultpose,autorun,description}
-// could even be stored as wiki page
-
-fetch('./templates.json')
-// e.g [commands with optional pose]
-
-// watch can be a template too
-	<a-text side="double" networked="template:#text-template;attachTemplateToLocal:false;" id="instructionA" value="Interactive instructions:" position="0 1.5 -0.2" scale="0.2 0.2 0.2"></a-text>
-	<a-text side="double" id="instructionB" target value="jxr lg Fox.glb 0.001" position="0 1.65 -0.2" scale="0.1 0.1 0.1">
-		<a-entity gltf-model="Fox.glb" scale="0.005 0.005 0.005"></a-entity>
-	</a-text>
-	<a-text side="double" networked="template:#text-template;attachTemplateToLocal:false;" id="instructionC" target value="jxr obsv observablehq-numberOfPages-835aa7e9" position="0 1.55 -0.2" scale="0.1 0.1 0.1"></a-text>
-	<a-text side="double" networked="template:#text-template;attachTemplateToLocal:false;" id="instructionD" target value="jxr 1s startSelectionVolume()" position="0 1.50 -0.2" scale="0.1 0.1 0.1"></a-text>
-*/
-	init:function(){
-		var el = this.el
-		let generatorName = this.attrName
-		var links = [ // could be in the commands file instead
-			"target:#instructionA; source:#instructionB",
-			"target:#instructionA; source:#instructionC",
-			"target:#instructionA; source:#instructionD",
-		]
-		links = []
-		//fetch("commands.json").then(res => res.json() ).then(res => {
-		var commandsURL = "https://fabien.benetou.fr/PIMVRdata/CabinCommands?action=source"
-		commandsURL = "https://fabien.benetou.fr/PIMVRdata/EngineSequentialTutorialCommands?action=source" // new default
-		var src = AFRAME.utils.getUrlParameter('commands-url')
-		if (src && src != "") commandsURL = src
-		fetch(commandsURL).then(res => res.json() ).then(res => {
-			// to consider for remoteLoad/remoteSave instead, to distinguish from url though.
-			// also potential security concern so might insure that only a specific user, with mandatory password access, added commands.
-			var visible = true
-			if (c.visible) visible = c.visible
-			res.map( c => addNewNote( c.value, c.position, c.scale, c.id, generatorName, c.visible) )
-				// missing name/title, autorun (true/false), description, 3D icon/visual, visiblity (useful for sequential tutorial)
-			links.map( l => { var linkEl = document.createElement("a-entity"); 
-					 linkEl.setAttribute("line-link-entities", l)
-					 el.appendChild(linkEl) 
-			} )
-			var hideRest = AFRAME.utils.getUrlParameter('commands-hide-rest')
-			if (hideRest && hideRest != "") setTimeout( _ => toggleVisibilityAllButClass('commands-from-external-json'), 5000) // waiting for everything to have loaded...
-		})
-	},
-});
-
-function save(){
-	var data = targets.map( e => { return {
-			localname: e.localName,
-			src: e.getAttribute("src"),
-			position: e.getAttribute("position"),
-			rotation: e.getAttribute("rotation"),
-			scale: e.getAttribute("scale"),
-			value: e.getAttribute("value"),
-		} } )
-	cabin = data
-	localStorage.setItem('cabin', JSON.stringify( data) )
-	return data
-	// could be called on page exit, unsure if reliable in VR
-	// alternatively could be call after each content is moved or created
-}
-
-function load(){
-	if (localStorage.getItem('cabin'))
-		cabin = JSON.parse(localStorage.getItem('cabin'))
-	cabin.map( e => {
-		var newel = document.createElement(e.localname)
-		savedProperties.map( p => {
-			if (e[p] ) newel.setAttribute(p, e[p])
-		})
-		AFRAME.scenes[0].appendChild( newel )
-	})
-}
-
-function remoteLoad(){
-	fetch(url+'source') 
-		.then( response => { return response.json() } )
-		.then( data => { console.log("remote data:", data) })
-	// does actually load back. Should consider what load() does instead.
-
-	// for the reMarkable write back in source, OCR/HWR could be done on the WebXR device instead
-		// alternatively "just" sending the .jpg thumbnail would be a good enough start
-		// note that highlights are also JSON files
-		// both might not be ideal directly in the original JSON but could be attachement as URLs
-}
-
-function remoteSave(){
-	  fetch(url+'edit', {
-		  method: 'POST',
-		  headers: {'Content-Type':'application/x-www-form-urlencoded'},
-		  body: "post=1&author=PIMVR&authpw=edit_password&text="+JSON.stringify( cabin )
-	  }).then(res => res).then(res => console.log("saved remotely", res))
-}
-
-function switchSide(){
-	// mostly works... but event listeners are not properly removed. Quickly creates a mess, low performance and unpredictable.
-	document.querySelector("#"+sides[primarySide]+"Hand").removeAttribute("pinchprimary")
-	document.querySelector("#"+sides[secondarySide]+"Hand").removeAttribute("pinchsecondary")
-	document.querySelector("#"+sides[secondarySide]+"Hand").removeAttribute("wristattachsecondary")
-	document.querySelector("#"+sides[secondarySide]+"Hand").setAttribute("pinchprimary", "")
-	document.querySelector("#"+sides[primarySide]+"Hand").setAttribute("pinchsecondary", "")
-	document.querySelector("#"+sides[primarySide]+"Hand").setAttribute("wristattachsecondary", "target: #box")
-	if (primarySide == 0) {
-		secondarySide = 0
-		primarySide = 1
-	} else {
-		primarySide = 0
-		secondarySide = 1
-	}
-}
-
-function cloneAndDistribute(){
-	el = document.querySelector("a-box[src]") // page
-	// trying instead to rely on previously selected matching element and dl2p
-
-	// lack visual feedback to show what is indeed lastly selected or the distance found
-	//el = selectedElements[selectedElements.length-2] // not current command
-	times = Math.floor(dl2p*10) // also assume it's been done properly
-	if (times < 2) times = 7
-	
-	offset = .5
-	 for (var i = 0; i < times ; i++) { // equivalent of Blender array modifier
-		let newEl = el.cloneNode() 
-		AFRAME.scenes[0].appendChild(newEl) // takes time...
-		setTimeout( setZ, 100, {el: newEl, z: -1-i*offset} )
-		newEl.addEventListener('hasLoaded', function (event) {
-			//this.object3D.position.z = i*offset
-			console.log("loaded") // doesnt seem to happen
-		})
-	 }
-
-	function setZ(params){
-		params.el.object3D.position.z = params.z
-	}
-}
-
-function loadPageRange(start=1, end=-1, startPosition={x:0, y:1.3, z:-.7}, stepVector={x:.2, y:0, z:0}){
-	const baseURL = "https://fabien.benetou.fr/pub/home/future_of_text_demo/content/book_as_png/gfg_d-"
-	const extension = ".png"
-
-	// assumes portrait A4-ish
-	var rootEl = AFRAME.scenes[0]
-	if (end<0) end = start
-	
-	let step = 0
-	for (let i=start; i<=end; i++){
-		step++
-		let el = document.createElement("a-box")
-		el.setAttribute("target", true)
-		//el.setAttribute("position", ""+ step/5+ " 1.3 -.7") // could be based on selectedElements last position instead
-		let pos = "" + startPosition.x+stepVector.x*step + " " + startPosition.y+stepVector.y*step + " " + startPosition.z+stepVector.z*step 
-		el.setAttribute("position", pos)
-		// layout system could be parametric, e.g over x or y or z or another system
-		el.setAttribute("width", ".1")
-		el.setAttribute("height", ".15")
-		el.setAttribute("depth", ".01")
-		pageNumber = i
-		if (pageNumber<10) pageNumber = "0"+pageNumber
-		if (pageNumber<100) pageNumber = "0"+pageNumber
-		el.setAttribute("src", baseURL+pageNumber+extension)
-		el.setAttribute("pagenumber", pageNumber)
-		el.id = pageNumber + "_" + Date.now()
-		rootEl.appendChild(el)
-		let posInterface = "" + startPosition.x+stepVector.x*step + " " + startPosition.y+1+stepVector.y*step + " " + startPosition.z+stepVector.z*step 
-		let UI = addNewNote("jxr nextPage('"+el.id+"')", posInterface, "0.1 0.1 0.1", el.id+"_interface")
-		//el.setAttribute("attach","target:#"+el.id+"_interface")
-	}
-}
-
-function writeWebDAV(){
-	const webdavurl = "https://webdav.benetou.fr";
-	const client = window.WebDAV.createClient(webdavurl)
-	async function w(path = "/file.txt"){ return await client.putFileContents(path, "SpaSca test"); }
-	w("/fot.txt") // need new permissions
-}
-
-function getPagesFromWebDAV(){
-	const webdavurl = "https://webdav.benetou.fr";
-	const client = window.WebDAV.createClient(webdavurl)
-	async function getDirectory(path = "/"){ return await client.getDirectoryContents(path); }
-	getDirectory("book_as_png").then( d => d.sort( (a,b) => (a.filename>b.filename)).slice(0,10).map( (c,i) => addPageFromURL(webdavurl+c.filename)))
-}
-
-function addPageFromURL(url){
-	if (url.indexOf(".png")<0) return
-	let el = document.createElement("a-box")
-	el.setAttribute("position", -Math.random()+" "+Math.random()*3 + " -1")
-	el.setAttribute("width", ".1")
-	el.setAttribute("height", ".15")
-	el.setAttribute("depth", ".01")
-	el.setAttribute("src", url)
-	AFRAME.scenes[0].appendChild(el)
-	return el
-}
-
-function getModelsFromWebDAV(){
-	const webdavurl = "https://webdav.benetou.fr";
-	const client = window.WebDAV.createClient(webdavurl)
-	async function getDirectory(path = "/"){ return await client.getDirectoryContents(path); }
-	getDirectory("models").then( d => d.sort( (a,b) => (a.filename>b.filename)).slice(0,10).map( (c,i) => addModelFromURL(webdavurl+c.filename)))
-}
-
-function addModelFromURL(url){
-	return addNewNote("jxr lg "+url+ " 0.001", -Math.random()+" "+Math.random()*3 + " -1")
-	// should try boxing it instead in 1m3
-}
-
-// same principle to go from nextPage() to openingLinkedPages() from wiki URL
-	// consider screenstack, could add a note to mode further
-
-function loadWikiAsGraph(){
-	fetch(wikiAsImages).then(response => response.json()).then(data => {
-		Object.entries(data.Nodes).slice(0,maxItems).map( v => {
-			let pageName = v[0]
-			let targest = v[1].Targets
-			let el = addPageFromURL(baseLiveURL+pageName.replace(".","_")+imageExtension)
-			el.id = pageName
-			el.classname = "wikipage"
-			// should rely on tryCachedImageOtherwiseRenderLive(pages) instead
-			setTimeout( _ => { 
-				let pos = el.getAttribute("position")
-				let UI = addNewNote("jxr openFromNode('"+el.id+"')", pos, "0.1 0.1 0.1", el.id+"_interface")
-				console.log("should add: addNewNote('jxr openNewNode("+pageName+")')")
-			}, 100 ) // wait for the entity to be actually added
-			// to be coupled with loadCodeFromPage()
-				// see also the idea that each wiki page wouldn't just be descriptive but also have code
-					// related pages
-					// https://fabien.benetou.fr/Fabien/Principle
-					// https://fabien.benetou.fr/CognitiveEnvironments/CognitiveEnvironments
-					// https://fabien.benetou.fr/Cookbook/Cognition
-		})
-	})
-}
-
-function nextPage(id){
-console.log("nextpage()")
-	// assuming only direct parent for now
-	const baseURL = "https://fabien.benetou.fr/pub/home/future_of_text_demo/content/book_as_png/gfg_d-"
-	const extension = ".png"
-	let pageNumber = Number( id.split("_")[0] )
-console.log(pageNumber+1)
-	loadPageRange(pageNumber+1)
-}
-
-function loadCodeFromPage(url="https://fabien.benetou.fr/Analysis/BeyondTheCaseAgainstBooks?action=source"){
-	// alternatively could load from a page number
-	fetch(url)
-	.then( r => r.text() )
-	.then(data => { 
-		let code = data.split("\n").filter( l => (l.slice(0,2) == "[@") )[0].slice(2).slice(0,-2);
-		// example as PmWiki parsing
-		eval(code)
-	} )
-}
-
-function loadFromMastodon(statusesURL="https://mastodon.pirateparty.be/api/v1/accounts/56066/statuses"){
-	fetch(statusesURL).then( r => r.json() ).then( t => t.filter( i => i.in_reply_to_id == null ).map( (i,n) => {
-		let div = document.createElement("div")
-		div.innerHTML = i.content
-		addNewNote(div.innerText, "1 "+ (1.2+(n+1)/20) +" -0.4")
-	} ) )
-}
-
-const tile_extension = ".glb"
-
-// could become a dedicated asset sets, e.g asset-metadata.json in that directory
-const available_asset_kits = [
-	{
-		tile_URL : "../content/asset_kits/KenneyHexTiles/",
-		tiles : ["building_cabin", "building_castle", "building_dock", "building_farm", "building_house", "building_market", "building_mill", "building_mine", "building_sheep", "building_smelter", "building_tower", "building_village", "building_wall", "building_water", "dirt", "dirt_lumber", "grass", "grass_forest", "grass_hill", "path_corner", "path_cornerSharp", "path_crossing", "path_end", "path_intersectionA", "path_intersectionB", "path_intersectionC", "path_intersectionD", "path_intersectionE", "path_intersectionF", "path_intersectionG", "path_intersectionH", "path_start", "path_straight", "river_corner", "river_cornerSharp", "river_crossing", "river_end", "river_intersectionA", "river_intersectionB", "river_intersectionC", "river_intersectionD", "river_intersectionE", "river_intersectionF", "river_intersectionG", "river_intersectionH", "river_start", "river_straight", "sand", "sand_rocks", "stone", "stone_hill", "stone_mountain", "stone_rocks", "unit_boat", "unit_house", "unit_houseLarge", "unit_mill", "unit_tower", "unit_tree", "unit_wallTower", "water", "water_island", "water_rocks",],
-		tiles_types_full : [ "building_", "river_", "sand", "stone", "water"],
-		tiles_types_parts : [ "unit_", "path_" ],
-		hex_type : true,
-	},{
-		tile_URL : "../content/asset_kits/KenneyRetroMedieval/",
-		tiles_types_full : ["floor", "column", "tower", "wall"],
-		tiles_types_parts : ["battlement"],
-		tiles : [ "battlement", "battlement_cornerInner", "battlement_cornerOuter", "battlement_half", "column", "columnPaint", "columnPaint_damaged", "column_damaged", "detail_barrel", "detail_crate", "detail_crateSmall", "fence", "floor", "floor_flat", "floor_stairs", "floor_stairsCornerInner", "floor_stairsCornerOuter", "floor_steps", "floor_stepsCornerInner", "floor_stepsCornerOuter", "overhang", "overhang_fence", "overhang_round", "roof", "roof_corner", "roof_edge", "structure", "structure_poles", "structure_wall", "tower", "towerPaint", "towerPaint_base", "tower_base", "tower_edge", "tower_top", "wall", "wallFortified", "wallFortifiedPaint", "wallFortifiedPaint_gate", "wallFortifiedPaint_half", "wallFortified_gate", "wallFortified_gateHalf", "wallFortified_half", "wallPaint", "wallPaint_detail", "wallPaint_flat", "wallPaint_gate", "wallPaint_half", "wall_detail", "wall_flat", "wall_flatGate", "wall_gate", "wall_gateHalf", "wall_half", "wall_low" ],
-		hex_type : false,
-	}
-]
-
-var selected_asset_kit = 1
-
-// consider also a set of assets, e.g this one but also another kit from the same artist
-// consider the other direction, i.e how a single glTF could become a set of tiles
-
-function displayAllTiles(){
-	const scale = 1/10
-	let last_type = null
-	available_asset_kits[selected_asset_kit].tiles.map( (t) => {
-		let x = -1*scale
-		if (!last_type) n = 0
-		const tiles_types = [ ...available_asset_kits[selected_asset_kit].tiles_types_full, ...available_asset_kits[selected_asset_kit].tiles_types_parts]
-		tiles_types.map( (tile_type,ttn) => {
-			if (t.indexOf(tile_type) > -1) {
-				x = ttn/10 
-				if (tile_type != last_type) n = 0
-				last_type = tile_type
-			}
-		} )
-		let el = addGltfFromURLAsTarget( available_asset_kits[selected_asset_kit].tile_URL+t+tile_extension, 
-			.09,
-			""+x+" 0.7 -"+n*scale )
-		// fine tuning should also be per asset set
-		// el.class = ...
-		n++
-	} )
-	// could consider a new spawner type so that picking a tile clones it first
-		// could do same behavior as on release or on picked, namely register listener then act on event
-}
-// try generating at scale, e.g 2, a landscape to explore based on type
-	// with scale adjusting as jxr line to be the Wondering pills/drinks/mushroom to change scale
-		// cf similar commands to move a class, consequently could add class after addGltfFromURLAsTarget
-
-function randomTileFull(){
-	const tiles_full = available_asset_kits[selected_asset_kit].tiles.filter( t => { let present = false; available_asset_kits[selected_asset_kit].tiles_types_full.map(m => { if (t.indexOf(m)>-1) present = true; }); return present} )
-	return tiles_full[Math.floor(Math.random()*tiles_full.length)]
-}
-
-var tiles_snapping_grid = []
-
-function getClosestTilesSnappingPosition( t, threshold=0.05 ){
-	let point = null
-	let found = tiles_snapping_grid.map( i => { return { pos:i, dist: i.distanceTo(t) } } )
-		.filter( t => t.dist < threshold )
-		.sort( (a,b) => a.dist > b.dist)
-	if (found && found[0]) point = found[0].pos
-	return point
-}
-
-var tile_snapping_enabled = true
-
-AFRAME.registerComponent('snap-on-pinchended', {
-	init: function(){
-		let el = this.el
-		let clone
-		this.el.addEventListener('picked', function (event) {
-			if (tile_snapping_enabled) {
-				clone = el.object3D.clone() // worked with AFrame version but didnt get complex geometry
-				AFRAME.scenes[0].object3D.add( clone )
-				clone.traverse( c => {
-					if (c.type == "Mesh") {
-						c.material = c.material.clone()
-						c.material.opacity = .5
-						c.material.transparent = true
-					}
-				 } )
-			}
-		})
-		this.el.addEventListener('moved', function (event) {
-			if (tile_snapping_enabled) {
-				var pos = AFRAME.utils.coordinates.parse( el.getAttribute("position") )
-				pos.x = pos.x.toFixed(1) 
-				pos.y = pos.y.toFixed(1)
-				pos.z = pos.z.toFixed(1)
-				clone.position.set(pos.x, pos.y, pos.z)
-			}
-		})
-		this.el.addEventListener('released', function (event) {
-			if (tile_snapping_enabled) { // might generalize the name as now used for compound primitives too
-				el.setAttribute("rotation", "0 0 0")
-				// could limit to an axis or two, e.g here y axis probably should be kept or at least adjust to next 1/6th rotation
-				// could snap to invisible grid too, e.g every 1 or 1/10th unit 
-				var pos = AFRAME.utils.coordinates.parse( el.getAttribute("position") )
-				pos.x = pos.x.toFixed(1) // i.e .1m so 1/10th of a meter here, 10cm
-				pos.y = pos.y.toFixed(1)
-				pos.z = pos.z.toFixed(1)
-				// could check first if that "spot" is "free", e.g not other targets on that position
-					// but then if not, what? move to another of the closest 6th closest points? (2 vertical, 2 horizontal, 2 depth) or even 8th with diagonales?
-						// if not? now what? move until there is a free spot?
-				el.setAttribute("animation__snap"+Date.now(), "property: position; to: "+AFRAME.utils.coordinates.stringify(pos)+"; dur: 200;");
-				//el.setAttribute("position", AFRAME.utils.coordinates.stringify(pos))
-				//if (clone) clone.remove()
-				if (clone) AFRAME.scenes[0].object3D.remove( clone )
-
-				if (el.className == "compound_object"){
-					let thresholdDistance = 0.2 // based on object size
-					targets.filter( i => (
-						(i.className == el.className)
-						&& el.getAttribute("position").distanceTo(i.getAttribute("position")) == 0.2)
-						&& el.getAttribute("position").y == i.getAttribute("position").y
-						&& el.getAttribute("position").z == i.getAttribute("position").z
-						).map( _ => document.querySelector("#snapping-sound").components.sound.playSound() )
-				} // very restrictive, also doesn't repulse away
-
-			// if works, generalize and add to https://git.benetou.fr/utopiah/text-code-xr-engine/issues/66
-			// should come back from emit('released')
-			// could rely on getClosestTilesSnappingPosition()
-				// if it works, might check if position is not already used by a tile
-			}
-		})
-	}
-})
-
-function generateRandomPlace(max_i=10, max_j=10, scale=1/10, y=1.4){
-	// lifesize,  y :  -2, scale 1
-	// dollhouse, y : 1.4, scale 1/10
-	for (let i=0;i<max_i;i++){
-		for (let j=0;j<max_j;j++){
-			let offset_if_hex = 0
-			if (available_asset_kits[selected_asset_kit].hex_type && j%2) offset_if_hex = 1/2
-			let pos = new THREE.Vector3( (i+offset_if_hex)*scale, y, (j*8.5/10)*scale )
-			el = addGltfFromURLAsTarget( 
-				available_asset_kits[selected_asset_kit].tile_URL+randomTileFull()+tile_extension, 
-				1*scale, 
-				AFRAME.utils.coordinates.stringify( pos )
-			)
-			el.setAttribute('snap-on-pinchended', '')
-			el.className += "tiles"
-			tiles_snapping_grid.push( pos )
-		}
-	}
-}
-
-// could add behavior based on class or, maybe easier, add a snapping-after-release component
-// it would register an event listener and the released element would trigger an event
-
-function rescalePlace(scale = 10, yoffset=-1){
-	let places = Array.from( document.querySelectorAll(".tiles") )
-	tiles_snapping_grid = []
-	places.map( e => {
-		scl = e.getAttribute("scale"); e.setAttribute("scale", scl.x*scale+ " " + scl.y*scale + " " + scl.z*scale)
-		pos = e.getAttribute("position"); e.setAttribute("position", pos.x*scale+ " " + (pos.y+yoffset) + " " + pos.z*scale)
-		let pos3 = new THREE.Vector3( pos.x*scale, pos.y+yoffset, pos.z*scale )
-		tiles_snapping_grid.push( pos3 )
-	} )
-}
-
-function addScreenshot(){
-	screenshotcanvas = document.querySelector('a-scene').components.screenshot.getCanvas('perspective')	
-	var sel = document.createElement("a-image") // could use a flat box instead, or use it as a frame
-	AFRAME.scenes[0].appendChild(sel) 	
-	sel.setAttribute("src", screenshotcanvas.toDataURL() )
-	sel.setAttribute("height", .1)
-	sel.setAttribute("width", .2)
-	sel.setAttribute("position", "0 1.4 -0.1")
-	targets.push(sel)
-	return sel
-}
-
-function newPrimitiveWithOutline( name="box", position="0 0 0", scale=".1 .1 .1" ){
-	let el = document.createElement("a-"+name)
-	let el_outline = document.createElement("a-"+name)
-	el.appendChild(el_outline)
-	el.setAttribute("scale", scale)
-	el.setAttribute("position", position)
-	el_outline.setAttribute("scale", "1.01 1.01 1.01")
-	el_outline.setAttribute("color", "gray")
-	el_outline.setAttribute("wireframe", "true")
-	el_outline.className = "outline_object" 
-	return el
-}
-
-function addCompoundPrimitiveExample(position="0 1.4 -0.2"){
-	let el = generateCompoundPrimitiveExample(position)
-	AFRAME.scenes[0].appendChild(el)
-	targets.push(el)
-	el.setAttribute('snap-on-pinchended', true) // could set the parameter here, e.g sound if close to same type
-	return el
-}
-
-function addBlockCodeExample(text="hi", pos="0 1.4 -0.2", color="black", outlineColor="white"){
-	let el = addNewNote( text )
-	el.setAttribute("color", color)
-	el.setAttribute("outline-color", outlineColor)
-	el.setAttribute("position", pos)
-	let compountPrim = generateCompoundPrimitiveExample()
-	compountPrim.setAttribute("position", "0.1 0 -0.051")
-	el.appendChild(compountPrim)
-	// el.setAttribute('snap-on-pinchended', true) 
-	return el
-}
-
-function generateCompoundPrimitiveExample(position="0 1.4 -0.2"){
-	var el = document.createElement("a-entity")	
-	el.setAttribute("position", position)
-	el.id = "compound_object_" + Date.now()
-	el.className = "compound_object" 
-	let parts = []
-	parts.push( newPrimitiveWithOutline("box",           "0 0 0",     ".2 .1 .1") )
-	parts.push( newPrimitiveWithOutline("box",        ".125 0 0",  ".05 .05 .05") )
-	parts.push( newPrimitiveWithOutline("box",  "-.125 0.0375 0",  ".05 .025 .1") )
-	parts.push( newPrimitiveWithOutline("box", "-.125 -0.0375 0",  ".05 .025 .1") )
-	parts.push( newPrimitiveWithOutline("box",  "-.125 0 0.0375", ".05 .05 .025") )
-	parts.push( newPrimitiveWithOutline("box", "-.125 0 -0.0375", ".05 .05 .025") )
-	parts.map( p => el.appendChild(p) )
-	return el
-}
-
-function addPrimitive( name, position="0 1.4 -0.2" ){
-	let el = newPrimitiveWithOutline( name )
-	el.setAttribute("position", position)
-	AFRAME.scenes[0].appendChild(el)
-	el.id = "template_object_" + name
-	el.className = "template_object" 
-	targets.push(el)
-	el.setAttribute('clone-on-primarypinchstarted', true)
-	return el
-}
-
-AFRAME.registerComponent('clone-on-primarypinchstarted', { 
-  init: function () {
-	let el = this.el
-	this.el.addEventListener('picked', function (event) {
-		selectedElement = instanciateFromPrimitive( selectedElement )
-	})
-  }
-})
-
-function instanciateFromPrimitive(element){
-	var clone = element.cloneNode(true)
-	clone.removeAttribute('clone-on-primarypinchstarted')
-	clone.setAttribute( "scale", element.getAttribute("scale") ) // somehow lost?
-	clone.id += "_clone" + Date.now()
-	clone.className = "cloned"
-	targets.push(clone)
-	AFRAME.scenes[0].appendChild(clone)
-	return clone
-}
-
-function addAllPrimitives(){
-	const other_primitives = ["camera", "cursor", "sky", "light", "sound", "videosphere"]
-	const other_primitives_with_param_needed = ["text", "gltf-model", "obj-model", "troika-text"]
-	Object.getOwnPropertyNames(AFRAME.primitives.primitives)
-	// thanks to https://github.com/Utopiah/aframe-inVR-blocks-based-editor/blob/master/aframe-invr-inspect.js
-		.map( i => i.replace("a-",""))
-		.filter( i => other_primitives.indexOf(i) < 0 )
-		.filter( i => other_primitives_with_param_needed.indexOf(i) < 0 ) // temporarilty disabled
-		.map( (i,j) => addPrimitive( i, ""+ j/7 + " 1.4 -0.5" ) )
-}
-
-const eventHighlighterReady = new Event("highlighterready");
-var highlighter
-shiki.setCDN('../content/shiki/') // see https://github.com/shikijs/shiki#specify-a-custom-root-directory
-shiki.getHighlighter({ theme: 'monokai', langs: ['javascript' ] }).then(h => { highlighter = h; document.body.dispatchEvent(eventHighlighterReady); } )
-	// see https://github.com/shikijs/shiki/blob/main/docs/languages.md 
-
-function highlight(code = `console.log("Here is your code."); var x = 5;`, language='javascript'){
-	if (!highlighter) return null
-	// check set colorRange if the result is {} which is the case when shiki highlighter isn't ready or available
-	const tokens = highlighter.codeToThemedTokens(code, language)
-	let pos=0
-	let colorRange={}
-	tokens.map( line => {
-		line.map( (t,i) => {
-			colorRange[pos] = t.color/*.replace("#","0x")*/
-			pos+=t.content.length
-		})
-		pos++
-	})
-	return colorRange
-}
-
-function startExperience(){
-	//fetch("https://fabien.benetou.fr/Tools/Docker?action=source").then(r=>r.text()).then( page => { addCodeEditor( page, "" ) })
-        //if (AFRAME.utils.device.checkHeadsetConnected()) AFRAME.scenes[0].enterVR();
-	//document.querySelector("#snapping-sound").components.sound.playSound();
-	document.querySelector("#mainbutton").style.display = "none"
-}
-
-// track created editors then apply actions to the currently selected one
-// problems happen when relying on querySelector/getElementById rather than a specific editor
-	// do these based on codeEditor.element rather than document	
-// still probably problematic for interactions
-	// consider for now only the currentEditor
-
-function nextLineCodeEditor(codeEditor, lines=1){ // can be negative to scroll up
-	if (codeEditor.line+lines < 0) return
-	codeEditor.line+=lines
-	let content=codeEditor.page.split("\n").slice(codeEditor.line,codeEditor.line+codeEditor.lengthWindowRange).join("\n"); 
-	codeEditor.currentlyDisplayedText=content
-	codeEditor.element.setAttribute("troika-text", {value: content})
-	if (codeEditor.language) codeEditor.element.setAttribute("troika-text", {colorRanges: highlight(content, language='javascript')})
-	let gutterEl = codeEditor.element.querySelector(".leftgutter")
-	if (gutterEl){
-		let lineNumbers = "\n"
-		for (let i=codeEditor.line+1;i<=codeEditor.line+codeEditor.lengthWindowRange;i++){
-			for (let pad=0;pad<String(getNumberOfLinesFromCodeEditor()).length-String(i).length; pad++)
-				lineNumbers+="_"
-			lineNumbers+=i+"\n"
-		}
-		gutterEl.setAttribute("troika-text", {value: lineNumbers})
-	}
-
-	let rightGutterEl = codeEditor.element.querySelector(".rightgutter")
-	if (rightGutterEl){
-		b = rightGutterEl.parentElement.object3D.children[0]._textRenderInfo.blockBounds
-		w = b[2]-b[0]
-		h = b[3]-b[1]
-		let scrollBarHeight = codeEditor.lengthWindowRange/codeEditor.page.match(/\n/g).length * h
-		let scrollBarVerticalOffset = codeEditor.line/codeEditor.page.match(/\n/g).length * h
-		if (scrollBarHeight < .1) scrollBarHeight = .1
-		rightGutterEl.object3D.position.y= h/2-scrollBarHeight/2 - scrollBarVerticalOffset
-	}
-}
-
-function nextPageCodeEditor(codeEditor){
-	nextLineCodeEditor(codeEditor, codeEditor.lengthWindowRange)
-}
-
-function previousPageCodeEditor(codeEditor){
-	nextLineCodeEditor(codeEditor, -codeEditor.lengthWindowRange)
-}
-
-function stopScrollCodeEditor(codeEditor){
-	codeEditor.scrollInterval = clearInterval( codeEditor.scrollInterval )
-}
-
-function startScrollCodeEditor(codeEditor){
-	if (!codeEditor.scrollInterval) codeEditor.scrollInterval = setInterval( _ => nextLineCodeEditor(codeEditor), 100)
-}
-
-function highlightAllOccurences(codeEditor, keyword="function"){
-	let indices = []
-	let lastfound = codeEditor.currentlyDisplayedText.indexOf(keyword,0)
-	while (lastfound>-1) {
-		indices.push(lastfound)
-		lastfound = codeEditor.currentlyDisplayedText.indexOf(keyword,lastfound+keyword.length)
-	}
-	indices.map( pos => {
-		let offset = (codeEditor.currentlyDisplayedText.slice(0,pos).match(/[\n\t ]/g)||[]).length
-		pos-=offset
-		highlightString(pos, keyword.length)
-	})
-}
-
-function hightlightNextKeyword(codeEditor, keyword="function"){
-	let pos = codeEditor.currentlyDisplayedText.indexOf(keyword)
-	// invisible characters... some still left
-	let offset = (codeEditor.currentlyDisplayedText.slice(0,pos).match(/[\n\t ]/g)||[]).length
-	pos-=offset
-	highlightString(pos, keyword.length)
-}
-
-function highlightString(codeEditor, pos, length){
-	for (let c=pos;c<pos+length;c++) highlightChar(codeEditor,  c )
-}
-
-// WARNING this is limited to visible characters, i.e not " " or "\t" or "\n"
-// should instead allow to highlight " " and "\t" both looking the same
-function highlightChar(codeEditor, pos=0, name=null){ // could have multiple selection
-	let b = Array.from( codeEditor.element.object3D.children[0].geometry.attributes.aTroikaGlyphBounds.array ).slice(pos*4,pos*4+4)
-	let w = b[2]-b[0]
-	let h = b[3]-b[1] // could be used to check for same line, if so could make a single block from beginning to end
-
-	let g = new THREE.BoxGeometry( w, h, .01  );
-	let m = new THREE.MeshBasicMaterial( {color: 0xffffff, opacity: 0.8, transparent: true} );
-	let c = new THREE.Mesh( g, m )
-	if (name) c.name = name
-	codeEditor.element.object3D.add( c );  
-
-	c.position.x= b[0]+w/2
-	c.position.y= b[1]+h/2
-	c.position.z= .01
-}
-
-function highlightUnderChar(codeEditor, pos=0, name=null){
-	let b = Array.from( codeEditor.element.object3D.children[0].geometry.attributes.aTroikaGlyphBounds.array ).slice(pos*4,pos*4+4)
-	// note that this skips invisible char and thus desync codeEditor.caret from actual position
-		// but, for now at least, " " and "\t" seems to be of equal value and "\n" does not shift on the current line
-		// currently we could count the invisible moving ones on this line and negative offset horizontally
-	let currentLineNumber = (codeEditor.currentlyDisplayedText.slice(0, pos ).match(/\n/g)||[]).length
-	let currentPositionOnLine = codeEditor.currentlyDisplayedText.slice(0, pos ).length
-		- codeEditor.currentlyDisplayedText.split("\n").slice(0,currentLineNumber).join("\n").length
-	console.log(currentPositionOnLine)
-// might need a special case for the beginning of the line... or rather maybe the position here is different, it's the number of the glyph
-// e.g "   x" x is not 3 but 0
-// we could also count then from the string but we don't have that, just pos as parameter. Some extra information might be needed.
-
-	let currentLineContent = codeEditor.currentlyDisplayedText.split("\n")[currentLineNumber].slice(0, currentPositionOnLine)
-	let invisibleOnCurrentLine = (currentLineContent.slice(0, currentPositionOnLine).match(/[\t ]/g)||[]).length
-	const spaceSize = .046 // hardcoded but changes per front so should be measured instead
-		// can be done via temptroikaobject.element.object3D.children[0].geometry.attributes.aTroikaGlyphBounds.array[0] for value " _"
-			// as a kind of calibration
-	let w = b[2]-b[0]
-	let h = b[3]-b[1] // could be used to check for same line, if so could make a single block from beginning to end
-//console.log(invisibleOnCurrentLine, currentLineContent)
-
-	let g = new THREE.BoxGeometry( w, .01, .01  );
-	let m = new THREE.MeshBasicMaterial( {color: 0xffffff, opacity: 0.8, transparent: true} );
-	let c = new THREE.Mesh( g, m )
-	if (name) c.name = name
-	codeEditor.element.object3D.add( c );
-
-	c.position.x= b[0]+w/2-invisibleOnCurrentLine*spaceSize
-	c.position.y= b[1]-.01
-	c.position.z= .01
-}
-
-function moveCaretToNextVisibleChar(codeEditor){
-	addCaretToCodeEditor( ++codeEditor.caret )
-	// might be able to reach non visible one by remove an offset
-}
-
-function addCaretToCodeEditor(codeEditor, pos=0){
-	if (codeEditor.caret) removeCaretFromCodeEditor(codeEditor)
-	highlightUnderChar(codeEditor, pos, "caret")
-	codeEditor.caret = pos
-}
-
-function removeCaretFromCodeEditor(codeEditor){
-	codeEditor.element.object3D.getObjectByName("caret").removeFromParent()
-}
-
-function clearCodeEditorContent(codeEditor){
-	updateCodeEditorWithContent( "" )
-}
-
-// should support a range, note the entire document (or window?)
-function searchAndReplaceInCodeEditor(codeEditor, before, after){
-	updateCodeEditorWithContent( codeEditor, codeEditor.currentlyDisplayedText.replaceAll(before, after))
-	// note that it desyncs from page so page should only be seen as the initial source
-		// this though would break scrolling which is based on page
-		// consequently page should be modified
-}
-
-function updateCodeEditorWithContent(codeEditor, content){
-	if (!codeEditor.element) return
-	codeEditor.currentlyDisplayedText=content
-	codeEditor.element.setAttribute("troika-text", {value: content})
-	if (codeEditor.language) codeEditor.element.setAttribute("troika-text", {colorRanges: highlight(content, codeEditor.language)})
-}
-
-function addBackdropToTroikaElement( codeEditor ){
-	let el = codeEditor.element
-	el.addEventListener("object3dset", e => {
-		el.object3D.children[0].addEventListener("synccomplete", e => {
-			// this can be used for resizing but without add the element
-			if (codeEditor.element.querySelector(".leftgutter")) return // already added, should unregister
-
-			b = el.object3D.children[0]._textRenderInfo.blockBounds
-			w = b[2]-b[0]
-			h = b[3]-b[1]
-
-			g = new THREE.BoxGeometry( w, h, .01  );
-			m = new THREE.MeshBasicMaterial( {color: 0, opacity: 0.9, transparent: true} );
-			c = new THREE.Mesh( g, m );
-			el.object3D.add( c );  
-			c.name = "backdrop"
-			c.position.z=-.01
-			c.position.x= w/2
-		})
-	})
-}
-
-function addGuttersToTroikaElement( codeEditor ){
-	let el = codeEditor.element
-	el.addEventListener("object3dset", e => {
-		el.object3D.children[0].addEventListener("synccomplete", e => {
-			if (codeEditor.element.querySelector(".leftgutter")) return 
-			// already added, should unregister, can be removed to allow dynamic resizing BUT should skip adding element
-	
-			b = el.object3D.children[0]._textRenderInfo.blockBounds
-			w = b[2]-b[0]
-			h = b[3]-b[1]
-
-			gutterWidth = .2 * String(getNumberOfLinesFromCodeEditor(codeEditor)).length
-			//should adjust width based on number of lines in total first
-			g = new THREE.BoxGeometry( gutterWidth, h, .01  );
-			m = new THREE.MeshBasicMaterial( {color: 0x333333, opacity: 0.9, transparent: true} );
-			c = new THREE.Mesh( g, m );
-			el.object3D.add( c );  
-			c.position.z=-.01
-			c.position.x= -gutterWidth/2
-			//c.rotation.y= .2 // looks nice but have to consider text on top first, could apply rotation to text too
-			var leftGutter = document.createElement("a-troika-text")
-			leftGutter.setAttribute("anchor", "left" )
-			leftGutter.setAttribute("outline-width", "5%" )
-			leftGutter.setAttribute("outline-color", "black" )
-			let lineNumbers = "\n"
-			for (let i=codeEditor.line+1;i<=codeEditor.line+codeEditor.lengthWindowRange;i++){
-				for (let pad=0;pad<String(getNumberOfLinesFromCodeEditor(codeEditor)).length-String(i).length; pad++)
-					lineNumbers+="_" // not using a fixed width font now so " " is smaller
-				lineNumbers+=i+"\n"
-			}
-			lineNumbers.slice(0,-1)
-			leftGutter.setAttribute("troika-text", {value: lineNumbers})
-			leftGutter.setAttribute("troika-text", {textIndent: -.5})
-			leftGutter.className = "leftgutter"
-			codeEditor.element.appendChild( leftGutter )
-			// should be updated when scrolling
-	
-			gutterWidth = .1
-			g = new THREE.BoxGeometry( gutterWidth, h, .01  );
-			m = new THREE.MeshBasicMaterial( {color: 0x333333, opacity: 0.9, transparent: true} );
-			c = new THREE.Mesh( g, m );
-			el.object3D.add( c );  
-			c.position.z=-.01
-			c.position.x= w+gutterWidth/2
-			//c.rotation.y= -.2 // looks nice but have to consider text on top first
-	
-			var rightGutter = document.createElement("a-cylinder")
-			// height proportional to the visible content to the terminal size
-			let scrollBarHeight = codeEditor.lengthWindowRange/getNumberOfLinesFromCodeEditor(codeEditor) * h
-			let scrollBarVerticalOffset = codeEditor.line/getNumberOfLinesFromCodeEditor(codeEditor) * h
-			if (scrollBarHeight < .1) scrollBarHeight = .1
-			rightGutter.setAttribute("height", scrollBarHeight )
-			rightGutter.setAttribute("radius", .01 )
-			rightGutter.className = "rightgutter"
-			// should become a constrained target (moving only on y axis and clamped)
-			codeEditor.element.appendChild( rightGutter )
-			// so... rightgutter vs rightGutter ... somehow changing to the "correct" one breaks the editor itself (?!)
-			rightGutter.object3D.position.x= w+gutterWidth/2
-			rightGutter.object3D.position.y= h/2-scrollBarHeight/2 - scrollBarVerticalOffset
-			// offset by line position proportional also then updated when scrolling
-			
-			gutterHeight = .3
-			g = new THREE.BoxGeometry( w, gutterHeight, .01  );
-			m = new THREE.MeshBasicMaterial( {color: 0x333333, opacity: 0.9, transparent: true} );
-			c = new THREE.Mesh( g, m );
-			el.object3D.add( c );  
-			c.position.z=-.01
-			c.position.y= -h/2-gutterHeight/2
-			c.position.x= w/2
-			//c.rotation.x= -.2 // looks nice but have to consider text on top first
-			// should add the commands here
-			var middleGutter = document.createElement("a-troika-text")
-			middleGutter.setAttribute("anchor", "left" )
-			middleGutter.setAttribute("outline-width", "5%" )
-			middleGutter.setAttribute("outline-color", "black" )
-			middleGutter.setAttribute("troika-text", {value: ":(will add commands here)"})
-			//middleGutter.setAttribute("troika-text", {textIndent: -.3})
-			middleGutter.className = "middlegutter"
-			codeEditor.element.appendChild( middleGutter )
-			middleGutter.object3D.position.y= -h/2-gutterHeight/2
-			// should disable the overlay first, see parseKeys
-				// see listeners in 'hud'
-			let enteringCommand = false
-			document.addEventListener('keydown', function(event) {
-				if (keyboardInputTarget != 'codeeditor') return
-				if (event.key == ":"){
-					enteringCommand = true
-					//let middlegutter = document.getElementById("middlegutter")
-					middleGutter.setAttribute("troika-text", {value: ":(started typing command)"})
-					// should add text here until esc or enter is pressed
-				} else if (enteringCommand) {
-					if (event.key == "Escape"){
-						enteringCommand = false
-						middleGutter.setAttribute("troika-text", {value: "(cancel, ready to receive new command)"})
-					} else if (event.key == "Enter"){
-						enteringCommand = false
-						middleGutter.setAttribute("troika-text", {value: "(executed, ready to receive new command)"})
-						// could rely only on searchAndReplaceInCodeEditor(before, after) for now
-							// which BTW should support a range, note the entire document (or window?)
-					} else {
-						middleGutter.setAttribute("troika-text", {value: 
-							middleGutter.getAttribute("troika-text").value
-							+ event.key})
-					}
-				}
-			});
-		})
-	})
-}
-
-function getNumberOfLinesFromCodeEditor(codeEditor){
-	let newLines = codeEditor.page.match(/\n/g)
-	if (!newLines) return 1 // undefined or 0
-	return newLines.length+1
-}
-
-function getEditorFromId( id ){
-	return editors.filter(e=>e.element.id.includes(id))?.[0]
-}
-
-// add jxr command on top of the editor e.g "jxr focusCodeEditor()" which would replace keyboard input
-	// switching keyboardInputTarget to 'codeeditor' then to 'hud' when done
-	// should also support clipboard or even a more direct way to have impact
-	// could save remotely (e.g wiki) or locally in localStorage
-function addCodeEditor(page="jxr console.log('hello world')", language="javascript",
-	position="-.5 1.6 -.7", name="codeditor", width=50, preventReflow=false ){
-	let codeEditor = {
-		element: null,
-		line: 0,
-		page: null,
-		startWindowRange: 0,
-		lengthWindowRange: 20,
-		scrollInterval: null,
-		currentlyDisplayedText: "",
-		caret: null,
-		language: ''
-	}
-	// could also add empty but with column and row for sizing
-
-	let forcedLines = ''
-	let pos = 0
-	let content = page
-	let line = ''
-	let parts =  page.split(' ')
-	let n = 0
-
-	if (!preventReflow && !language.length){
-		while ( pos < page.length ){
-			while ( line.length < width && parts[n]){
-				line += parts[n++] + ' '
-			}
-			let potentialine = content.slice(pos, pos+width)
-			forcedLines += line.trim() + '\n'
-			pos+=line.length
-			if (line.length==0) pos++
-			line = ''
-		}
-
-		codeEditor.page = forcedLines
-	} else {
-		codeEditor.page = page
-	}
-	codeEditor.line = codeEditor.startWindowRange
-	let numberOfLines = getNumberOfLinesFromCodeEditor(codeEditor)
-	if (numberOfLines<codeEditor.lengthWindowRange) codeEditor.lengthWindowRange = numberOfLines
-
-	content=codeEditor.page.split("\n").slice(codeEditor.line,codeEditor.line+codeEditor.lengthWindowRange).join("\n"); 
-	codeEditor.currentlyDisplayedText=content
-
-	if (document.getElementById(name)) name += Date.now()  
-	// shouldn't exist prior
-	if (!codeEditor.element) codeEditor.element = addNewNote(content, position, "0.1 0.1 0.1", name, "tool")
-	codeEditor.element.classList.add('reader')
-	codeEditor.element.setAttribute("troika-text", {value: content})
-	codeEditor.element.setAttribute("troika-text", {depthOffset: .1})
-	codeEditor.element.setAttribute("rotation", "30 0 0")
-	if (language.length && language != "none") {
-		codeEditor.element.setAttribute("troika-text", {colorRanges: highlight(content, language)})
-		codeEditor.language = language
-	}
-
-	addBackdropToTroikaElement( codeEditor)
-	addGuttersToTroikaElement( codeEditor)
-	
-	let scrollbarPicked = false
-	let previousPosition
-	let p = document.querySelector('[pinchprimary]')
-	let target = new THREE.Vector3(); // create once an reuse it
-	p.addEventListener('pinchended', pinchPrimaryScrollbarEnded );
-	function pinchPrimaryScrollbarEnded(event){
-		//p.removeEventListener('pinchended', pinchPrimaryScrollbarEnded)
-		//p.removeEventListener('pinchmoved', pinchPrimaryScrollbarMoved)
-		//p.removeEventListener('pinchstarted', pinchPrimaryScrollbarStarted)
-		if (!scrollbarPicked) return
-		scrollbarPicked = false
-	}
-	p.addEventListener('pinchmoved', pinchPrimaryScrollbarMoved );
-	function pinchPrimaryScrollbarMoved(event){
-		if (!scrollbarPicked) return
-		if (previousPosition.y>event.detail.position.y)
-			nextLineCodeEditor(1)
-		else
-			nextLineCodeEditor(-1)
-		previousPosition = event.detail.position.clone()
-	}
-	p.addEventListener('pinchstarted', pinchPrimaryScrollbarStarted );
-	function pinchPrimaryScrollbarStarted(event){
-		let rightGutterEl = codeEditor.element.querySelector(".rightgutter")
-		previousPosition = event.detail.position.clone()
-		rightGutterEl.object3D.getWorldPosition( target );
-		if (previousPosition.distanceTo(target)<0.1) scrollbarPicked = true
-	}
-	
-	editors.push( codeEditor )
-	return codeEditor
-}
-
-function addCodeMultipleEditors(parts, src, language, name='splitededitor'){
-	let editorParts = []
-	let pl = src.length/parts
-	for (let n=0; n<parts; n++ ){
-		editorParts.push( 
-			addCodeEditor( src.slice(n*pl,(n+1)*pl), language, '-0.22 '+(2-n/10)+' -.4', name+'_part'+n )
-		)
-	}
-	return editorParts
-}
-
-function mergeEditors( editors ){
-	// inherit language and content from the last found
-	let pos = ''
-	let content = ''
-	let language = ''
-	editors.reverse().map( e => {
-		content += e.page // could add separator, e.g new line
-		if (language != e.language) console.warn('different language in editors to merge')
-		language = e.language
-		pos = e.element.getAttribute("position").clone()
-		e.element.setAttribute("visible", false)
-	})
-	return addCodeEditor( content, language, AFRAME.utils.coordinates.stringify( pos ), "codeditormerge", editorBaseWidth, true )
-}
-
-// should reconsider the behavior as the content could still be the same but what is displayed changed
-function splitEditorHorizontally( codeEditor, preventReflow=true){
-	let p1, p2
-	if (codeEditor.language.length){
-		let content = codeEditor.page.split('\n')
-		p1 = content.slice(content.length/2).join('\n')
-		p2 = content.slice(0,content.length/2).join('\n')
-	} else {
-		p1 = codeEditor.page.slice(codeEditor.page.length/2)
-		p2 = codeEditor.page.slice(0,codeEditor.page.length/2)
-	}
-	let pos1 = codeEditor.element.getAttribute("position").clone()
-	let pos2 = codeEditor.element.getAttribute("position").clone()
-	//pos1.x-=1
-	//pos2.x+=1
-	pos1.y-=.1
-	pos2.y+=.1
-	// could also be set based on controllers/hands positions at the end of a stretch/pull gesture
-	let ce1 = addCodeEditor( p1, codeEditor.language, AFRAME.utils.coordinates.stringify( pos1 ), "codeditorsplit", editorBaseWidth, preventReflow)
-	let ce2 = addCodeEditor( p2, codeEditor.language, AFRAME.utils.coordinates.stringify( pos2 ), "codeditorsplit", editorBaseWidth, preventReflow )
-		//codeEditor.language, codeEditor.element.getAttribute("position"), "codeditorsplit" )
-	// should be smaller yet somehow displays it all
-	//updateCodeEditorWithContent(codeEditor, p2 )
-	return [ce1, ce2]
-}
-
-// could change model opacity based on hand position, fading out when within a (very small here) safe space
-
-function removeOutlineFromEntity( el ){
-	[...el.querySelectorAll(".outline_object")].map( i => i.remove() )
-}
-
-function getIdFromPick(){
-	let id = null
-	let pp = selectedElements.filter( e => e.primary )
-	if (pp && pp[pp.length-1] && pp[pp.length-1].element ){
-		if (!pp[pp.length-1].element.id) pp[pp.length-1].element.id= "missingid_"+Date.now() 
-		id = pp[pp.length-1].element.id
-		setFeedbackHUD(id)
-	}
-	return id
-}
-
-function getClassFromPick(){ // should be classes, for now assuming one
-	let classFound = null
-	let pp = selectedElements.filter( e => e.primary )
-	if (pp && pp[pp.length-1] && pp[pp.length-1].element ){
-		//if (!pp[pp.length-1].element.className) pp[pp.length-1].element.className= "missingclass"
-		// arguable
-		classFound = pp[pp.length-1].element.className
-		setFeedbackHUD(classFound)
-	}
-	return classFound
-}
-
-function getArrayFromClass(classname){
-	return Array.from( document.querySelectorAll("."+classname) )
-}
-
-function applyToClass(classname, callback, value){
-// example applyToClass("template_object", (e, val ) => e.setAttribute("scale", val), ".1 .1 .2")
-	getArrayFromClass(classname).map( e =>  callback(e, value))
-// could instead become a jxr shortcut, namely apply a set attribute to a class of entities
-}
-
-function changeColorLastClass(){
-	let classFound = getClassFromPick() // applies on primary only
-	if (classFound) 
-		[...document.querySelectorAll("."+classFound)].map( el => el.setAttribute("color", "red") )
-}
-
-function changeColorLastId(){
-	let id = getIdFromPick() // applies on primary only
-	if (id) document.querySelector("#"+id).setAttribute("color", "red")
-}
-
-function changeColorNextPinch(){
-	//let id = getIdFromPick() // applies on primary only
-		// does not work anymore ... but could listen to selectedElements changes via an observer but deprecated
-		// proxy could be nice but requires to modify push() calls first
-	let lastPrimary = selectedElements.filter( e => e.primary ).length
-
-	let checkForNewPinches = setInterval( _ => {
-		if (selectedElements.filter( e => e.primary ).length > lastPrimary){
-			let id = getIdFromPick() // applies on primary only
-			if (id) document.querySelector("#"+id).setAttribute("color", "red")
-			clearInterval(checkForNewPinches)
-		}
-	}, 50) // relatively cheap check, filtering on small array
-}
-
-// see demo ~30min in during https://www.youtube.com/watch?v=X9bQ-6oWKc4
-// should link to the right code already written
-	// see also cloneAndDistribute() & observe() but there is another one... between pinches
-		// observe being a shortcut to bindVariableValueToNewNote(variableName)
-let pointsFromMovement = []
-function nextMovementToPoints(debut=false){
-	pointsFromMovement = [] // could also add them to a larger array with timestamps
-	let el = document.querySelector('[pinchprimary]')
-	el.addEventListener('pinchended', function addThenRemove(event) { 
-		addPointToPointsFromMovement(event)
-		// could add a timeout so that if no pinchended happens after e.g 10sec one doesn't forget
-		el.removeEventListener('pinchended', addThenRemove)
-		el.removeEventListener('pinchstarted', addPointToPointsFromMovement)
-		el.removeEventListener('pinchmoved', addPointToPointsFromMovement)
-	});
-	el.addEventListener('pinchmoved', addPointToPointsFromMovement );
-	el.addEventListener('pinchstarted', addPointToPointsFromMovement );
-	function addPointToPointsFromMovement( event){
-		pointsFromMovement.push( event.detail.position.clone() )
-	}
-
-/*
-could be a promise also
-
-//see examples for debugging/dev 
-testPoints = await fetch("pointsFromMovementExample.json").then( r => r.json() )
-
-//could also otherwise down sample
-let first = new THREE.Vector3(  ).copy( testPoints[0] )
-let last = new THREE.Vector3(  ).copy( testPoints[testPoints.length-1]) 
-let distance = first.distanceTo( last )
-let direction = new THREE.Vector3().subVectors( last, first ).normalize()
-
-//example of adding on curve
-testPoints.map( p => addNewNote("something "+Math.random(), p) )
-
-//example of animating from start to end
-nn = addNewNote("something", testPoints[0]);
-nn.setAttribute("animation", {property: "position" , to: AFRAME.utils.coordinates.stringify(testPoints[testPoints.length-1]) } )
-*/
-}
-
-function addDropZone(position="0 1.4 -0.6", callback=setFeedbackHUD, radius=0.11){
-// consider how this behavior could be similar to the wrist watch shortcut
-// namely binding it to a jxr function
-	let el = document.createElement("a-sphere")
-	el.setAttribute("wireframe", true)
-	el.setAttribute("radius", radius)
-	el.setAttribute("position", position)
-	el.id = "dropzone_"+Date.now()
-	AFRAME.scenes[0].appendChild( el )
-	let sphere = new THREE.Sphere( AFRAME.utils.coordinates.parse( position ), radius )
-	// could become movable but would then need to move the matching sphere too
-		// could be a child of that entity
-	let pincher = document.querySelector('[pinchprimary]')
-	pincher.addEventListener('pinchended', function (event) { 
-		if (selectedElements.length){
-			let lastDrop = selectedElements[selectedElements.length-1]
-			if ((Date.now() - lastDrop.timestamp) < 1000){
-				if (sphere.containsPoint( lastDrop.element.getAttribute("position"))){
-					// should be a threejs sphere proper, not a mesh
-					console.log("called back" )
-					callback( lastDrop.selectedElement )
-				}
-			}
-		}
-	})
-	// never unregister
-	return el
-}
-
-/*
-
-generalize selector to pick last Nth rather than very last
-        adapt getIdFromPick() with .slice() after filter then map on length-N instead of length-1
-
-selector pickers : pickClass and pickId
-        display result in 3D HUD with rotating objects and selector value
-                ideally themselves also selectable/usable, e.g clone from HUD to bring back "out"
-                         requires extra work as becoming a child will not work, own positionning
-                                should fix that
-                        could compare to world coordinates instead of "just" position attribute
-        add a clear selector function to avoid making the HUD unusable
-
-could also pick via volume, e.g wireframe box
-        start with https://threejs.org/docs/#api/en/math/Box3.containsPoint
-                can iterate with https://threejs.org/docs/#api/en/math/Box3.containsBox
-                consider also https://threejs.org/docs/#api/en/math/Box3.intersectsBox
-
-consider pick then apply, i.e changeColorLastId() but for next Id
-        should be cancealable
-
-*/
-
-function addGrid(){ // not actually correct but does the job
-	plot = document.createElement("a-entity")
-	var idx = 0
-	for (var x=-5;x<=5;x++)
-		for (var y=0;y<=3;y++)
-			for (var z=-5;z<=5;z++){
-				xp=-x
-				yp=-y
-				zp=-z
-				plot.setAttribute("line__"+ ++idx, `start: ${x} ${y} ${z}; end : ${xp} ${y} ${z}; opacity: 1;`)
-				plot.setAttribute("line__"+ ++idx, `start: ${x} ${y} ${z}; end : ${x} ${yp} ${z}; opacity: 1;`)
-				plot.setAttribute("line__"+ ++idx, `start: ${x} ${y} ${z}; end : ${x} ${y} ${zp}; opacity: 1;`)
-			}
-	plot.id = "grid"
-	AFRAME.scenes[0].appendChild( plot )
-}
-
-// functions call by event listener should be within this scope
-// thus hopefully not conflicting with other listeners
-function emptyPinchToMove(){
-	const startRadius = .00001
-	const maxRadius = .1
-	const maxDist = .05
-	const resetPosition = "0 9999 0"
-	let previousPosition
-	let controlSphere = document.createElement("a-sphere")
-	let r = startRadius 
-	controlSphere.setAttribute("radius", r) 
-	controlSphere.setAttribute("color", "blue")
-	controlSphere.setAttribute("wireframe", "true")
-	controlSphere.setAttribute("position", resetPosition)
-	AFRAME.scenes[0].appendChild( controlSphere )
-	//targets.push(controlSphere) // keeping it out for specific control for now but should consider generalization
-        let el = document.querySelector('[pinchprimary]')
-        el.addEventListener('pinchended', function end(event) {
-		// el.removeEventListener('pinchended', end)
-		// el.removeEventListener('pinchstarted', pinched)
-		// el.removeEventListener('pinchmoved', moved)
-		r = startRadius
-		controlSphere.setAttribute("radius", r) 
-		controlSphere.setAttribute("position", resetPosition)
-        })
-        el.addEventListener('pinchmoved', moved );
-        function moved(event){
-		if (selectedElement) return
-		controlSphere.setAttribute("position", AFRAME.utils.coordinates.stringify( event.detail.position) )
-		if (r >= maxDist){
-			// start be movable after .05 diam
-			if (previousPosition){
-				diff = previousPosition.sub(event.detail.position).clone()
-				pushBackClass("hidableenvironment", diff.z*10) // consider something exponential instead while maintaining sign
-				pushLeftClass("hidableenvironment", diff.x*10)
-				// could rely on getArrayFromClass(classname) to then move on these 2 dimensions
-			}
-		} 
-		if (r < maxRadius) {
-			r += 0.01
-			controlSphere.setAttribute("radius", r) 
-		}
-		previousPosition = event.detail.position.clone()
-        }
-        el.addEventListener('pinchstarted', pinched );
-        function pinched(event){
-        }
-
-	let previousPositionSecondary
-        let elSecondary = document.querySelector('[pinchsecondary]')
-        elSecondary.addEventListener('pinchmoved', movedSecondary );
-        function movedSecondary(event){
-		if (selectedElement) return
-		if (previousPositionSecondary){
-			angle = previousPositionSecondary.sub(event.detail.position).clone()
-			let axis = new THREE.Vector3( 0, 1, 0 );
-			applyToClass("hidableenvironment", (e, val ) => {
-				//let rot = e.getAttribute("rotation")
-				//e.setAttribute("rotation", ""+rot.x+" "+(rot.y+val*90)+" "+rot.z)
-				// rotating from the center of the model, not the player position
-let obj = e.object3D
-obj.position.sub(val.point)
-obj.position.applyAxisAngle( axis, val.angle ) // no offset but reset when pinching again
-//obj.position.applyAxisAngle( axis, obj.rotation.y+val.angle ) // rotates with offset
-obj.position.add(val.point)
-obj.rotateOnAxis(axis, val.angle)
-// cf https://stackoverflow.com/questions/42812861/three-js-pivot-point/42866733#42866733
-// does reset on each new pinch though
-
-// might be a threejs vs AFrame rotation setup?
-			}, {angle:angle.x, point:event.detail.position.clone()})
-		}
-		previousPositionSecondary = event.detail.position.clone()
-        }
-}
-
-AFRAME.registerComponent('refresh-text-content-from-wiki-page', {
-	schema: {
-		pagename: {type: 'string', default: 'FoT'},
-	},
-	init:function(){
-		this.added = []
-		let = forcedPagename = AFRAME.utils.getUrlParameter('roomname')
-		forcedPagename?this.pagename=forcedPagename:this.pagename=this.data.pagename
-		this.tick = AFRAME.utils.throttleTick(this.tick, 500, this);
-	},
-	tick: function(){
-		let generatorName = this.attrName
-		fetch("https://fabien.benetou.fr/PIMVRdata/"+ this.pagename +"?action=source#" + Date.now()).then(res => res.text() ).then(res => {
-			res.split("\n").slice(0,maxItemsFromSources).map( (n,i) => {
-				found = this.added.find((str) => str === n)
-				if (typeof found === 'undefined'){
-					this.added.push(n)
-					addNewNote( n, "-1 "+(1+i/10)+" -2.5", ".1 .1 .1", null, generatorName ) 
-				}
-			})
-		})
-	}
-});
-
-function sendPerspectiveToServer(){
-	let pagename
-	let = forcedPagename = AFRAME.utils.getUrlParameter('roomname')
-	forcedPagename?pagename=forcedPagename:pagename="TestingPairCollaboration"
-	document.querySelector('a-scene').components.screenshot.getCanvas('perspective').toBlob( blob => { 
-	  let img = new File([blob], pagename+".jpg", { type: "image/jpeg"});
-
-	  form = new FormData();
-	  form.append('authpw', 'upload_pass_for_api');
-	  form.append('n', 'PIMVRdata.TestFormUpoad');
-	  form.append('action', 'postupload');
-	  form.append('uploadfile', img);
-
-	  fetch('https://fabien.benetou.fr/PIMVRdata/TestFormUpoad', {
-	    method: 'POST',
-	    body: form
-	  });
-	}, "image/jpeg", 0.8);
-}
-
-function doublePinchToScale(){
-	let initialPositionSecondary
-	let initialScale
-        let elSecondary = document.querySelector('[pinchsecondary]')
-        elSecondary.addEventListener('pinchmoved', movedSecondary );
-        function movedSecondary(event){
-		if (!selectedElement) return
-		let scale = initialScale * initialPositionSecondary.distanceTo(event.detail.position) * 50
-		selectedElement.setAttribute("scale", ""+scale+" "+scale+" "+scale+" ")
-        }
-        elSecondary.addEventListener('pinchstarted', startedSecondary );
-        function startedSecondary(event){
-		initialPositionSecondary = event.detail.position.clone()
-		if (!selectedElement) return
-		initialScale = AFRAME.utils.coordinates.parse( selectedElement.getAttribute("scale") ).x
-        }
-}
-
-function makeAnchorsVisibleOnTargets(){
-	targets.map( t => {
-		let controlSphere = document.createElement("a-sphere")
-		controlSphere.setAttribute("radius", 0.05) 
-		controlSphere.setAttribute("color", "blue")
-		controlSphere.setAttribute("wireframe", "true")
-		controlSphere.setAttribute("segments-width", 8)
-		controlSphere.setAttribute("segments-height", 8)
-		t.appendChild( controlSphere )
-	}) // could provide a proxy to be able to monitor efficiently
-}
-
-function startMesher(){
-// consider preview triangle from primary moved
-	let meshPoints = []
-	let meshTriangles = []
-	let offset
-	let meshEl = document.createElement("a-entity")
-	meshEl.className += "meshed"
-	AFRAME.scenes[0].appendChild( meshEl )
-
-        let elSecondary = document.querySelector('[pinchsecondary]')
-        elSecondary.addEventListener('pinchended', endedSecondary );
-	function endedSecondary(){
-		targets.push(meshEl)
-		meshEl.setAttribute('dynamic-body', "shape:hull")
-		// using 'dynamic-unless-picked' crashes the browser
-		//makeAnchorsVisibleOnTargets() // too large here
-		applyToClass("meshvertex", (e, val ) => e.setAttribute("visible", val), "false")
-		el.removeEventListener('pinchended', end)
-		elSecondary.removeEventListener('pinchended', endedSecondary );
-	}
-
-        let el = document.querySelector('[pinchprimary]')
-        el.addEventListener('pinchended', end)
-
-	function end(event) {
-		if (selectedElement) return
-		let pos = event.detail.position.clone()
-		if (meshPoints.length==0){
-			meshOffset = event.detail.position.clone()
-			meshEl.getAttribute("position").add(meshOffset)
-		}
-		let currentPos = AFRAME.utils.coordinates.stringify( pos.sub(meshOffset) )
-		let controlSphere = document.createElement("a-sphere")
-		controlSphere.className += "meshvertex"
-		controlSphere.setAttribute("radius", 0.01) 
-		controlSphere.setAttribute("color", "green")
-		controlSphere.setAttribute("wireframe", "true")
-		controlSphere.setAttribute("segments-width", 8)
-		controlSphere.setAttribute("segments-height", 8)
-		controlSphere.setAttribute("position", currentPos)
-		meshEl.appendChild( controlSphere )
-		meshPoints.push(controlSphere)
-		if (meshPoints.length==2){
-			let previousPos = AFRAME.utils.coordinates.stringify( 
-				meshPoints[meshPoints.length-2].getAttribute("position") )
-			meshEl.setAttribute("line", `start: ${previousPos}; end : ${currentPos}; opacity: 1; color:white;`)
-		}
-		if (meshPoints.length>2){
-			meshEl.removeAttribute("line")
-			let ranked = meshPoints
-				.slice(0,-1)
-				.map( t => { return { el: t, dist : pos.distanceTo(t.getAttribute("position") ) } })
-				.sort( (a,b) => a.dist - b.dist)
-			let triangle = document.createElement("a-triangle")
-			triangle.setAttribute("vertex-a", currentPos)
-			triangle.setAttribute("vertex-b", 
-				AFRAME.utils.coordinates.stringify( ranked[0].el.getAttribute("position") ))
-			triangle.setAttribute("vertex-c", 
-				AFRAME.utils.coordinates.stringify( ranked[1].el.getAttribute("position") ))
-			triangle.setAttribute("material", "side:double")
-			meshEl.appendChild( triangle )
-			meshTriangles.push( triangle )
-		}
-        }
-}
-
-AFRAME.registerComponent('dynamic-unless-picked', {
-	init: function(){
-		let el = this.el
-		el.setAttribute('dynamic-body', "")
-		this.el.addEventListener('picked', function (event) {
-			el.removeAttribute('dynamic-body')
-			el.setAttribute('static-body', "")
-		})
-		this.el.addEventListener('released', function (event) {
-			el.removeAttribute('static-body')
-			el.setAttribute('dynamic-body', "")
-		})
-	}
-	// should unregister on remove
-})
-
-AFRAME.registerComponent('collider-check', {
-  dependencies: ['raycaster'],
-
-  init: function () {
-    let worldPosition=new THREE.Vector3();
-    let v3 = new THREE.Vector3
-    let comeCloserInterval
-    this.el.addEventListener('raycaster-intersection', function (e) {
-      console.log('intersected')
-      comeCloserInterval = setInterval( _=> {
-	document.getElementById("leftHand").object3D.traverse( e => { if (e.name == "wrist") {
-		worldPosition.copy(e.position);e.parent.updateMatrixWorld();e.parent.localToWorld(worldPosition)
-	} })
-	e.detail.intersections[0]?.object.el.object3D.position.lerp(worldPosition, 0.1)
-	}, 100)
-    });
-    this.el.addEventListener('raycaster-intersection-cleared', function (e) {
-      console.log('cleared')
-      clearInterval( comeCloserInterval )
-    });
-  }
-});
-
-// should generalize to selector, like pushDownClass and related
-function tiltUpId(id){ tiltId(id, 0.1) }
-function tiltDownId(id){ tiltId(id, -0.1) }
-function tiltId(id, value){
-	document.getElementById(id).object3D.position.y+=value;
-	document.getElementById(id).object3D.rotation.x+=value; 
-}
-
-function onNextPinchSplitReader(){
-	//let id = getIdFromPick() // applies on primary only
-		// does not work anymore ... but could listen to selectedElements changes via an observer but deprecated
-		// proxy could be nice but requires to modify push() calls first
-	let lastPrimary = selectedElements.filter( e => e.primary ).length
-
-	let checkForNewPinches = setInterval( _ => {
-		if (selectedElements.filter( e => e.primary ).length > lastPrimary){
-			let id = getIdFromPick() // applies on primary only
-			if (id) {
-				let srcEditor = getEditorFromId( id )
-				let editorParts = splitEditorHorizontally( srcEditor )
-				// could position based on hands positions
-				// should hide or even delete older one
-				srcEditor.element.setAttribute('visible', false)
-				// could display a line between current pinch and secondary hand
-					// or temporary transparency on the 2 new editors
-					// could attach on hand indexes
-			}
-			clearInterval(checkForNewPinches)
-		}
-	}, 50) // relatively cheap check, filtering on small array
-}
-
-function addConnectorsToCodeEditor( codeEditor, input=true, output=true){
-	let el = codeEditor.element
-	el.addEventListener("object3dset", e => {
-		el.object3D.children[0].addEventListener("synccomplete", e => {
-			b = el.object3D.children[0]._textRenderInfo.blockBounds
-			w = b[2]-b[0]
-			h = b[3]-b[1]
-			// this assumes an axis aligned entity, which is correct until now
-			if (input){
-				el.setAttribute("line__input", `start: 0 0 0; end : -1 1 0; opacity: 1;`)
-				el.setAttribute("line__input__end", `start: -1 1 0; end : -2 1 0; opacity: 1;`)
-				// order matters for getConnectorsFromEditor, the very tip MUST be the end point
-			}
-			if (output){
-				el.setAttribute("line__output", `start: ${w} ${-h} 0; end : ${w+1} ${-h-1} 0; opacity: 1;`)
-				el.setAttribute("line__output__end", `start: ${w+1} ${-h-1} 0; end : ${w+2} ${-h-1} 0; opacity: 1;`)
-				// order matters for getConnectorsFromEditor, the very tip MUST be the end point
-			}
-		})
-	})
-	return el
-}
-
-function connectionsBetweenEditors( a, b ){
-	const connectionThreshold = 1 // to adjust after tries in VR, should probably be much shorter
-	let ca = getConnectorsFromEditor( a )
-	let cb = getConnectorsFromEditor( b )
-	let links = []
-	if ( ca.input && cb.output && ca.input.distanceTo(cb.output) < connectionThreshold ){
-		links.push({source:a, target:b})
-	}
-	if ( cb.input && ca.output && cb.input.distanceTo(ca.output) < connectionThreshold ){
-		links.push({source:b, target:a})
-	}
-	return links
-}
-
-function getConnectorsFromEditor( codeEditor ){
-	const pos = new THREE.Vector3()
-	const scale = new THREE.Vector3()
-	const quaternion = new THREE.Quaternion()
-	codeEditor.element.object3D.getWorldPosition(pos)
-	codeEditor.element.object3D.getWorldScale(scale)
-	codeEditor.element.object3D.getWorldQuaternion(quaternion)
-	let connectors = {source: codeEditor}
-	let res = ['input', 'output'].map( ctype => { // we might get different types of inputs or outputs later
-		let i = codeEditor.element.getObject3D('line__'+ctype+'__end')
-		if (i){
-			let tip = new THREE.Vector3( ...i.geometry.attributes.position.array.slice(3)) // end point
-			tip.applyQuaternion( quaternion )
-			tip.multiply(scale)
-			tip.add(pos)
-			connectors[ctype] = tip
-			//visualDebugSphere(tip)
-		}
-	})
-	return connectors
-}
-
-function generateGraphFromEditors( editors ){
-	let inputs = editors.map( e => getConnectorsFromEditor(e) ).filter( c => c.input )
-	let outputs = editors.map( e => getConnectorsFromEditor(e) ).filter( c => c.output )
-	let connections = []
-	// check distances between all inputs with outputs which are not from the same source
-	outputs.map( o => {
-		inputs.map( i => {
-			if (i.source != o.source && i.input.distanceTo( o.output ) < .2 )
-				connections.push( { source: o.source, target: i.source })
-		})
-	})
-	let graph = {}
-	editors.map( (e) => {
-		graph[e.element.id] = {}
-		let g = graph[e.element.id] 
-		g.editor = e
-		g.predecessors = []
-		g.successors = []
-		connections.map( c => {
-			if (c.target == e) g.predecessors.push(c.source)	
-			if (c.source == e) g.successors.push(c.target)	
-		})
-	})
-	return graph
-}
-
-function visualDebugSphere( pos ){
-	let controlSphere = document.createElement("a-sphere")
-	controlSphere.setAttribute("radius", 0.01) 
-	controlSphere.setAttribute("color", "blue")
-	controlSphere.setAttribute("wireframe", "true")
-	controlSphere.setAttribute("segments-width", 8)
-	controlSphere.setAttribute("segments-height", 8)
-	controlSphere.classList.add('visualdebug')
-	controlSphere.setAttribute("position", AFRAME.utils.coordinates.stringify( pos ) )
-	AFRAME.scenes[0].appendChild( controlSphere )
-	return controlSphere
-}
-
-function numberOfPredecessors( g ){ return Object.keys( g ).map( k => g[k].predecessors.length ) }
-
-function numberOfSuccessors( g ){ return Object.keys( g ).map( k => g[k].successors.length ) }
-
-function traverseFunctionGraph( g ){
-	let callStack = []
-	Object.keys( g ).map( k => {
-		if (!g[k].predecessors.length) callStack.push( g[k] )
-	} )
-	if (callStack.length < 1){
-		console.warn( 'no entry point found in editor graph' )
-		return []
-	}
-	if (callStack.length > 1){
-		console.warn( 'multiple entry point founds in editor graph' )
-		return []
-	}
-	let pos = 0
-	while ( callStack[pos].successors?.[0] ) {
-		callStack.push( g[ callStack[pos].successors[0].element.id ] )
-		pos++
-	}
-	return callStack
-}
-
-var points2D = []
-function startDraw2D(){
-// consider draw( pos ) too
-	let p = document.querySelector('[pinchprimary]')
-	let target = new THREE.Vector3(); // create once an reuse it
-	p.addEventListener('pinchended', pinchPrimaryDraw2DEnded );
-	let indexTipTracking
-	let controlSphere
-	function pinchPrimaryDraw2DEnded(event){
-		let pos = event.detail.position.clone()
-		let controlSphere = points2D[points2D.length-1]
-		// check if close enough to starting point, if yes then remove listeners
-		/*
-		if ( pos.distanceTo( controlSphere.getAttribute("position") ) < .1 ){
-			console.log('removed listeners')
-			p.removeEventListener('pinchended', pinchPrimaryDraw2DEnded)
-			p.removeEventListener('pinchmoved', pinchPrimaryDraw2DMoved)
-			p.removeEventListener('pinchstarted', pinchPrimaryDraw2DStarted)
-		}
-		*/
-		//clearInterval( indexTipTracking )
-
-	}
-	p.addEventListener('pinchmoved', pinchPrimaryDraw2DMoved );
-	function pinchPrimaryDraw2DMoved(event){
-		// update line ending point position
-		let pos = event.detail.position.clone()
-		//let controlSphere = points2D[points2D.length-1]
-	}
-	p.addEventListener('pinchstarted', pinchPrimaryDraw2DStarted );
-	function pinchPrimaryDraw2DStarted(event){
-		// creates an offset between last pinch and last index tip position
-			// could merge them by updating the previous line end to the current pinch position
-			// could add a new line between both
-		if (points2D.length && points2D.length > 0){
-			let lastPoint = points2D[points2D.length-1]
-			let previouspos = 
-				lastPoint.getAttribute("line__0").end.clone().add( lastPoint.getAttribute('position') )
-		}
-		controlSphere = document.createElement("a-sphere")
-		points2D.push( controlSphere )
-		let pos = event.detail.position.clone()
-		controlSphere.className += "draw2d"
-		controlSphere.setAttribute("radius", 0.005)
-		controlSphere.setAttribute("color", "purple")
-		controlSphere.setAttribute("wireframe", "true")
-		controlSphere.setAttribute("segments-width", 8)
-		controlSphere.setAttribute("segments-height", 8)
-		controlSphere.setAttribute("position", pos)
-		AFRAME.scenes[0].appendChild( controlSphere )
-		controlSphere.setAttribute("line__0", `start: 0 0 0; end : 0 0 0; opacity: 1; color:purple;`)
-		clearInterval( indexTipTracking )
-		indexTipTracking = setInterval( _ => {
-			target = p.components['hand-tracking-controls'].indexTipPosition
-			// sometimes getting strange values, might check against null/0
-			let line = controlSphere.getAttribute("line__0")
-			let cspos = controlSphere.getAttribute("position")
-			if (line){
-				let previousPos = AFRAME.utils.coordinates.stringify( target.sub(cspos) )
-				//pos.z = line.start.z // stick to a single plane, here axis aligned
-				controlSphere.setAttribute("line__0", "end", previousPos)
-			}
-		}, 20)
-	}
-}
-
-function colorGradient(fadeFraction, rgbColor1, rgbColor2, rgbColor3) {
-// https://gist.github.com/gskema/2f56dc2e087894ffc756c11e6de1b5ed
-    var color1 = rgbColor1;
-    var color2 = rgbColor2;
-    var fade = fadeFraction;
-
-    // Do we have 3 colors for the gradient? Need to adjust the params.
-    if (rgbColor3) {
-      fade = fade * 2;
-
-      // Find which interval to use and adjust the fade percentage
-      if (fade >= 1) {
-        fade -= 1;
-        color1 = rgbColor2;
-        color2 = rgbColor3;
-      }
-    }
-
-    var diffRed = color2.red - color1.red;
-    var diffGreen = color2.green - color1.green;
-    var diffBlue = color2.blue - color1.blue;
-
-    var gradient = {
-      red: parseInt(Math.floor(color1.red + (diffRed * fade)), 10),
-      green: parseInt(Math.floor(color1.green + (diffGreen * fade)), 10),
-      blue: parseInt(Math.floor(color1.blue + (diffBlue * fade)), 10),
-    };
-
-    return 'rgb(' + Math.max(0,gradient.red) + ',' + Math.max(0,gradient.green) + ',' + Math.max(0,gradient.blue) + ')';
-}
-
-function presetColorGradient(fadeFraction){
-  let highColor = { red: 217, green: 83, blue: 79 };
-  let mediumColor = { red: 240, green: 173, blue: 78 };
-  let lowColor = { red: 92, green: 184, blue: 91 };
-
-  return colorGradient(fadeFraction, lowColor, mediumColor, highColor);
-}
-
-function tensionVisualized(){
-	let p = document.querySelector('[pinchprimary]')
-	let ptarget = new THREE.Vector3(); // create once an reuse it
-	let s = document.querySelector('[pinchsecondary]')
-	let starget = new THREE.Vector3(); // create once an reuse it
-	let entity = document.createElement("a-entity")
-	AFRAME.scenes[0].appendChild( entity )
-	entity.setAttribute("line__0", `start: 0 0 0; end : 0 0 0; opacity: 1; color:purple;`)
-	let indexesTipTracking = setInterval( _ => {
-		ptarget = p.components['hand-tracking-controls'].indexTipPosition
-		starget = s.components['hand-tracking-controls'].indexTipPosition
-		// sometimes getting strange values, might check against null/0
-		let line = entity.getAttribute("line__0")
-		if (line){
-			let start = AFRAME.utils.coordinates.stringify( ptarget )
-			entity.setAttribute("line__0", "start", start)
-			let end = AFRAME.utils.coordinates.stringify( starget )
-			entity.setAttribute("line__0", "end", end)
-			entity.setAttribute("line__0", "color", presetColorGradient( ptarget.distanceTo(starget)) )
-		}
-	}, 20)
-}
-
-function ontouch(){
-	let p = document.querySelector('[pinchprimary]')
-	let ptarget = new THREE.Vector3(); // create once an reuse it
-	let indexesTipTracking = setInterval( _ => {
-		ptarget = p.components['hand-tracking-controls'].indexTipPosition
-		getClosestTargetElement( ptarget )?.setAttribute('wireframe', true)
-	}, 20)
-}
-
-function thumbToIndexPull(){
-	let p = document.querySelector('[pinchprimary]')
-	let tip = new THREE.Vector3(); // create once an reuse it
-	let proximal = new THREE.Vector3(); // create once an reuse it
-	let thumb = new THREE.Vector3(); // create once an reuse it
-	let touches = []
-	const threshold_thumb2tip = 0.01
-	const threshold_thumb2proximal = 0.05
-	let indexesTipTracking = setInterval( _ => {
-		// cpnsider getObjectByName() instead
-		p.object3D.traverse( e => { if (e.name == 'index-finger-tip' ) tip = e.position })
-		//index-finger-phalanx-distal 
-		//index-finger-phalanx-intermediate
-		p.object3D.traverse( e => { if (e.name == 'index-finger-phalanx-proximal' ) proximal = e.position })
-		p.object3D.traverse( e => { if (e.name == 'thumb-tip' ) thumb = e.position })
-		let touch = {}
-		touch.date = Date.now()
-		touch.thumb2tip = thumb.distanceTo(tip)
-		if (!touch.thumb2tip) return
-		touch.thumb2proximal = thumb.distanceTo(proximal)
-		//console.log( touch.thumb2tip, touch.thumb2proximal )
-		// usually <1cm				<4cm (!)
-		//if ((touch.thumb2tip && touch.thumb2tip < threshold_thumb2tip)
-			//|| (touch.thumb2proximal && touch.thumb2proximal < threshold_thumb2proximal))
-		if (touch.thumb2tip < threshold_thumb2tip
-			|| touch.thumb2proximal < threshold_thumb2proximal){
-			if (touches.length){
-				let previous = touches[touches.length-1]
-				if (touch.date - previous.date < 300){
-					if (touch.thumb2tip < threshold_thumb2tip &&
-						previous.thumb2proximal < threshold_thumb2proximal){
-						console.log('^')
-						p.emit('thumb2indexpull')
-					}
-					if (touch.thumb2proximal < threshold_thumb2proximal &&
-						previous.thumb2tip < threshold_thumb2tip){
-						console.log('v')
-						p.emit('thumb2indexpush')
-					}
-				}
-			}
-			touches.push(touch)
-		}
-	}, 50)
-	// TODO
-	// Bind thumb2indexpush/thumb2indexpull to zoom in/out "world" i.e all assets that aren't "special" e.g self, lights, UI
-}
-
-function thumbToIndexAngle(){
-	let p = document.querySelector('[pinchprimary]')
-	let tip = new THREE.Vector3(); // create once an reuse it
-	let metacarpal = new THREE.Vector3(); // create once an reuse it
-	let thumb = new THREE.Vector3(); // create once an reuse it
-	let indexesTipTracking = setInterval( _ => {
-		p.object3D.traverse( e => { if (e.name == 'index-finger-tip' ) tip = e.position })
-		p.object3D.traverse( e => { if (e.name == 'thumb-metacarpal' ) metacarpal = e.position })
-		p.object3D.traverse( e => { if (e.name == 'thumb-tip' ) thumb = e.position })
-		tip.sub(metacarpal)
-		thumb.sub(metacarpal)
-		let angle = thumb.angleTo(tip)
-		if (angle > 0.9 && angle < 1.2) {
-			console.log( 'r' )
-			p.emit('thumb2indexpush')
-			// could insert (with max threshold) a targe entity between tip and thumb
-				// this entity could then ondrop add a new post it note or jxr element
-		}
-		// could also check angle against head to insure it's facing the user
-	}, 590)
-}
-
-// used for testing
-AFRAME.registerComponent('startfunctions', {
-  init: function () {
-
-	thumbToIndexAngle()
-	//thumbToIndexPull()
-	//ontouch()
-	//tensionVisualized()
-	//startExperience()
-	//doublePinchToScale()
-	//emptyPinchToMove()
-	//makeAnchorsVisibleOnTargets()
-	//startMesher()
-  }
-})
-
-</script>
 <div id="observablehq-key">
     <div id="observablehq-viewof-offsetExample-ab4c1560"></div>
     <div id="observablehq-result_as_html-ab4c1560"></div>
diff --git a/jxr.js b/jxr.js
new file mode 100644
index 0000000..d11435c
--- /dev/null
+++ b/jxr.js
@@ -0,0 +1,3409 @@
+/*
+// just text
+import {Runtime, Inspector} from "https://cdn.jsdelivr.net/npm/@observablehq/runtime@4/dist/runtime.js";
+import define from "https://api.observablehq.com/@utopiah/from-pim-to-2d-to-3d-to-xr-explorations@2010.js?v=3";
+import define2 from "https://api.observablehq.com/d/f219f0c440c6d5a2.js?v=3";
+new Runtime().module(define, name => {
+  if (name === "numberOfPages") return new Inspector(document.querySelector("#observablehq-numberOfPages-835aa7e9"));
+  document.querySelector(".a-enter-vr").style.position = "fixed"
+});
+
+// HTML with interactable input
+new Runtime().module(define2, name => {
+  if (name === "viewof offsetExample") return new Inspector(document.querySelector("#observablehq-viewof-offsetExample-ab4c1560"));
+  if (name === "result_as_html") return new Inspector(document.querySelector("#observablehq-result_as_html-ab4c1560"));
+  return ["result_no_name","result"].includes(name);
+});
+// setTimeout( _ => document.querySelector("#gui3d").setAttribute("html", "html:#observablehq-key;cursor:#cursor;" ) , 2000)
+  // <a-entity id="gui3d" class="observableui" position="0 1.5 -.4"></a-entity>
+*/
+
+/*
+
+motion to data
+	- integer, e.g distance from beginning to end
+	- curve, sampling N points between beginning and end
+
+being able to use that in jxr commands, with example related to positioning entities
+	see https://git.benetou.fr/utopiah/text-code-xr-engine/issues/52#issuecomment-229
+	
+warning that selectedElement will get overwritten once executing a command by pinching
+	consequently in addition to have a history of executed commands
+		there should be a history of selected elements
+			and maybe their changed position states
+*/
+
+// motivated by https://git.benetou.fr/utopiah/text-code-xr-engine/issues/63
+var reservedKeywords = ["selectedElement", "lastPointSketch ", "commandhistory", "groupSelection", "targets", "observe", "sa", "qs"]
+// see generated file reserved-keywords for more yet not sufficient, see instead parseJXR()
+// should also include some documentation
+
+const jxrrootURL = 'https://fabien.benetou.fr/pub/home/future_of_text_demo/'
+const prefix = /^jxr /
+const codeFontColor = "lightgrey"
+const fontColor= "white"
+const wikiAsImages = "https://vatelier.benetou.fr/MyDemo/newtooling/wiki_graph.json"
+const maxItems = 10
+const now = Math.round( +new Date()/1000 ) //ms in JS, seconds in UNIX epoch
+const baseCachedURL = "https://vatelier.benetou.fr/MyDemo/newtooling/textures/fabien.benetou.fr_" 
+const baseLiveURL = "https://vatelier.benetou.fr/MyDemo/newtooling/web/renders/fabien.benetou.fr_"
+const queryFormatBaseURL = "https://fabien.benetou.fr/"
+const imageExtension = ".png"
+const renderSuffix = "?action=serverrender"
+var selectedElement = null;
+var targets = []
+const zeroVector3 = new THREE.Vector3()
+var bbox = new THREE.Box3()
+bbox.min.copy( zeroVector3 )
+bbox.max.copy( zeroVector3 )
+var selectionBox = new THREE.BoxHelper( bbox.object3D, 0x0000ff);
+var groupHelpers = []
+var primaryPinchStarted = false
+var visible = true
+var setupMode = false
+var setupBBox = {}
+var wristShortcut = "jxr switchToWireframe()"
+var selectionPinchMode = false
+var groupingMode = false
+var sketchEl
+var lastPointSketch
+var hudTextEl // should instead rely on the #typinghud selector in most cases
+const startingText = "[]"
+var drawingMode = false
+var added = []
+const maxItemsFromSources = 20
+let alphabet = ['abcdefghijklmnopqrstuvwxyz', '0123456789', '<>'];
+var commandhistory = []
+const savedProperties = [ "src", "position", "rotation", "scale", "value", ] // add newer properties e.g visibility and generator as class
+var groupSelection = []
+var cabin //storage for load/save. Should use a better name as this is a reminder of a past version rather than something semantically useful.
+const url = "https://fabien.benetou.fr/PIMVRdata/CabinData?action="
+var primarySide = 0
+const sides = ["right", "left"]
+var generators = "line-link-entities link screenstack dynamic-view selectionboxonpinches keyboard "
+	+ "commands-from-external-json glossary timeline issues web-url background-via-url observableui hidableenvironmentfot fot"
+// could be an array proper completed on each relevant component registration
+var heightAdjustableClasses = ["commands-from-external-json"]
+var pinches = [] // position, timestamp, primary vs secondary
+var dl2p = null // from distanceLastTwoPinches
+var selectedElements = [];
+
+let editors = []
+var editorBaseWidth = 50
+
+// could add a dedicated MakeyMakey mode with a fixed camera, e.g bird eye view, and an action based on some physical input that others, thanks to NAF, could see or even use.
+	// ?inputmode=makeymakey
+
+AFRAME.registerComponent('enable-components-via-url', { 
+  init: function () {
+	var src = AFRAME.utils.getUrlParameter('enable-components-via-url')
+	if (src && src != "") {
+		src.split(",").map( c => {
+			this.el.setAttribute(c, "")
+		})
+	}
+  }
+})
+
+AFRAME.registerComponent('disable-components-via-url', { 
+  init: function () {
+	var src = AFRAME.utils.getUrlParameter('disable-components-via-url')
+	if (src && src != "") {
+		src.split(",").map( c => {
+			Array.from( document.querySelectorAll("["+c+"]") ).map( e => { e.removeAttribute(c) })
+		})
+	}
+  }
+})
+
+// e.g background https://fabien.benetou.fr/pub/home/metaverse.png might have to allow options like scale to allow for modifying both size and ratio
+AFRAME.registerComponent('background-via-url', { // non interactive mode
+  init: function () {
+	let generatorName = this.attrName
+	var src = AFRAME.utils.getUrlParameter('background')
+	if (src && src != "") {
+		this.el.setAttribute( "visible", "true")
+		this.el.setAttribute( "src", src )
+		this.el.className += generatorName
+		Array.from( document.querySelectorAll(".mural-instructions") ).map( i => {
+			i.setAttribute("visible", "true") 
+			i.className += generatorName
+		})
+	}
+  }
+})
+
+AFRAME.registerComponent('web-url', {
+// e.g <a-entity id=inbrowser web-url position="0 1.5 -2.4"></a-entity>
+// motivated by https://glitch.com/edit/#!/aframe-lil-gui?path=observablewidget.html
+  init: function () {
+	const url = "https://fabien.benetou.fr/Fabien/Principle?action=webvr"
+	var target = url
+	var src = AFRAME.utils.getUrlParameter('url')
+	// could also be a component parameter
+	var el = this.el
+	let generatorName = this.attrName
+	if (src && src != "") target = src
+	fetch(target).then( res => res.text() ).then( r => {
+	  pageEl = document.createElement("div")
+	  pageEl.id = "page"
+	  pageEl.innerHTML = r
+	  pageEl.style = "visibility:hidden;"
+	  document.body.appendChild(pageEl)
+	  el.setAttribute("html", "html:#page;cursor:#cursor;" )
+	  el.className += generatorName
+	  //backdrop
+	  const geometry = new THREE.PlaneGeometry( el.object3D.children[0].geometry.parameters.width*1.1,
+		el.object3D.children[0].geometry.parameters.height*1.1 );
+	  const material = new THREE.MeshBasicMaterial( {color: 0xffffff, side: THREE.DoubleSide} );
+	  const plane = new THREE.Mesh( geometry, material );
+	  plane.position.z = -.1
+	  el.object3D.add( plane );
+	})
+  }
+})
+
+function sendGlbFromEl(el){
+	const gltfExporter = new THREE.GLTFExporter();
+	const mesh = el.object3D
+
+	const options = {
+	    trs: true,
+	    onlyVisible: true,
+	    truncateDrawRange: false,
+	    binary: true,
+	    maxTextureSize: Infinity
+	};
+
+	gltfExporter.parse(
+	    mesh,
+	    function (result) {
+		if (immersClient) immersClient.sendModel("testing", new Blob([result]), "public")
+		console.log("sent blob")
+		// worked as https://immers.benetou.fr/s/639cb4171757b8382c120da1 of type model
+			// with glb as URL https://immers.benetou.fr/media/edf5641922e6371abb3118f56cd20b9b
+	    },
+	    function (error) {
+		console.log('An error happened during parsing', error);
+	    },
+	    options
+	);
+}
+
+var immersClient
+// See dedicated issue https://git.benetou.fr/utopiah/text-code-xr-engine/issues/47 
+if (false) // disabled for offline tests
+document.querySelector("#immersbundle").addEventListener('load',(event) => { 
+	immersClient = document.querySelector("immers-hud").immersClient
+	document.querySelector('immers-hud').immersClient.sendModel = async function sendModel (name, glb, privacy, icon, to = []) {
+		return this.activities.model(name, glb, icon, to, privacy)
+	} // shim until API update
+	document.querySelector("immers-hud").setAttribute("access-role", "modFull")
+	document.querySelector("immers-hud").immersClient.addEventListener("immers-client-connected", _ => {
+		//immersClient.addEventListener("immers-client-new-message", e => addNewNote(e.detail.message.messageHTML) ) 
+		immersClient.addEventListener("immers-client-new-message", async e => {
+			if (e.detail.message.type == "chat"){
+				let msg = ( await immersClient.activities.getObject( e.detail.message.id ))
+				if (msg.object.context.location )
+					addNewNote( e.detail.message.messageHTML, msg.object.context.location.position ,
+								"0.1 0.1 0.1", null, "immerschat", "true", msg.object.context.location.rotation )
+				else 
+					addNewNote( e.detail.message.messageHTML )
+				// could hook on pinchended
+				// immersClient.place.location = { position: "0 1.5 -2", rotation: "0 190 0" };
+				// immersClient.sendChatMessage(textvalue, "public"); 
+			}
+			if (e.detail.message.type == "media" && e.detail.message.mediaType == "image"){
+				console.log("src", e.detail.message.url)
+				let el = document.createElement("a-box")
+				el.setAttribute("position", -Math.random()+" "+Math.random()*3 + " -1")
+				el.setAttribute("width", ".1")
+				el.setAttribute("height", ".15")
+				el.setAttribute("depth", ".01")
+				el.setAttribute("src", e.detail.message.url.href)
+				AFRAME.scenes[0].appendChild(el)
+			}
+			if (e.detail.message.type == "other"){
+				let msg = ( await immersClient.activities.getObject( e.detail.message.id ))
+				console.log("maybe model, see object.type.model==model", msg )
+			}
+		})
+		immersClient.friendsList().then( r => {
+			if (r.length>0) addNewNote( "Friends:", "-1 1.65 -0.5") 
+			r.map( (u,i) => { 
+				let friendData = u.profile.displayName
+				if (u.locationName) friendData += " at " + u.locationName
+				if (u.locationURL) friendData += " (" + u.locationURL + " )"
+				// addNewNote( friendData, "-1 " + (1.6-i/20) + " -0.5") // should make this interpretable to join there
+				// hidden for workshop
+			} )
+		} ) 
+	})
+});
+
+function ims(msg){ 
+	if (!immersClient) { setFeedbackHUD("not connected via Immers"); return; }
+	immersClient.sendChatMessage(msg, "public")
+} // shorthand for jxr command, still requires parenthesis and quotes though, could be better to have a dedicated visual shorthand, e.g >>
+// can send code too e.g immersClient.sendChatMessage("jxr loadPageRange(3,4)", "public")
+
+/* not sure what's the right way... but timeout works, others don't.
+
+        immers-client-friends-update or immers-client-new-message to keep track of conversations between recurring meeting? Say you join a room, spend a working session with colleagues then leave. Could these be used to in this context to send reminders to those who subscribed to that event?
+*/
+
+var polys
+async function getPolyList(keyword){
+	//return await fetch('/search?keyword='+keyword).then( res => res.json() ).then( res => return res )
+	var response = await fetch('/search?keyword='+keyword);
+	var polys = await response.json()
+	return polys
+}
+
+// for testing purposes, disable when not local with asset caching server
+//getPolyList("pizza").then( p => polys = p.results )
+
+function cachePoly(res){
+	var n = 0;
+	res.map( i => { fetch(i.Thumbnail.replace("https://static.poly.pizza/","http://localhost:7777/getpoly?id=").replace(".webp","")) } ) ;
+	// see await Promise.all()
+}
+// should properly wait. Only once all queries are done then try to load.
+
+function loadPolyThumbnails(res){
+	var n = 0;
+	res.map( i => {
+		var el = document.createElement("a-image");
+		el.setAttribute("src", i.Thumbnail.replace("https://static.poly.pizza/","http://localhost:7777polydata/"));
+		el.setAttribute("position", "0 1 "+n--/10);
+			// could instead attach e.g 9 items to the wrist using wristattachsecondary on a palette
+		el.setAttribute("scale", ".1 .1 .1")
+		el.setAttribute("loadpolyfomthumbnail", "") // that could then be used to execute on pinch based on src property
+		AFRAME.scenes[0].appendChild(el);
+	} )
+}
+
+function loadFirstPolyModel(res){
+	var n = 0;
+	var i = res[n]
+	var el = document.createElement("a-gltf-model");
+	el.setAttribute("src", i.Thumbnail.replace("https://static.poly.pizza/","http://localhost:7777polydata/").replace("webp","glb")); 
+	el.setAttribute("position", "0 1 "+n--);
+	AFRAME.scenes[0].appendChild(el); 
+	return el
+}
+
+function loadPolyModels(res){
+// to load all models, rarely a good idea
+	var n = 0;
+	res.map( i => {
+		var el = document.createElement("a-gltf-model");
+		el.setAttribute("src", i.Thumbnail.replace("https://static.poly.pizza/","http://localhost:7777polydata/").replace("webp","glb")); 
+		el.setAttribute("position", "0 1 "+n--);
+		AFRAME.scenes[0].appendChild(el); 
+		// optionally rescale e.g rescaleModelFromPoly(el) // probably has to wait for it to be properly loaded, cf modelHasLoaded event
+			// e.g rescaleModelFromPoly ( loadFirstPolyModel(polys) ) won't work
+	} )
+}
+
+function rescaleModelFromPoly(modelEl){
+// rescale to fit in 1m3 box
+	var bbox = new THREE.Box3().setFromObject( modelEl.object3D );
+	var rescale = 1 / ( (( bbox.max.x - bbox.min.x) + (bbox.max.y - bbox.min.y) + (bbox.max.z - bbox.min.z) ) /3 );
+	modelEl.setAttribute("scale", rescale+ " " + rescale + " " + rescale)
+	// could also leave untouched if within boundaries, e.g > 0.1 and < 1
+}
+
+// SYNC WITH HMD EDITS before trying this
+/*
+
+source as URL e.g https://fabien.benetou.fr/Fabien/Principle?action=source (locally Fabien.Principle.pmwiki)
+	usual parsing (e.g stop words)
+	dedicated PmWiki cleanup e.g no URL
+	clean up or rather highlight (e.g color not being black) with presence from https://github.com/wordset/wordset-dictionary
+	could also have a short dictionnary of stop words based on popularity
+		e.g https://en.wikipedia.org/wiki/Most_common_words_in_English#100_most_common_words
+		but seems so short it might not help much, could try long and popular instead
+WPM * distance travelled as metric, not just 1
+
+can generate layout for keyboard as (Ctrl shortcut) copiable items to append to AR clipbard
+	https://twitter.com/utopiah/status/1533690234424139779
+		could also use an optional type in addition to target
+			such items would be copied without pressing Ctrl
+
+see remoteSave for saving to be able to use the result outside the HMD
+*/
+
+/*
+
+use imagesFromURLs (used in screenstack) on https://vatelier.benetou.fr/MyDemo/newtooling/wiki_graph.json
+       and line-link-entities="target:#instructionA; source:#instructionC" between pages
+
+*/
+
+// see https://remote-keyboard.glitch.me on how to provide a remote keyboard (no BT) for hud keydown/keyup events
+	// consider alt server e.g 9000-peers-peerjsserver-bxw59h3fm87.ws-eu47.gitpod.io as peerjs isn't always reliable
+	// to do the same offline could add to express too, cf https://github.com/peers/peerjs-server#combining-with-existing-express-app
+//new Peer("2022xrkbd").on('connection', conn => conn.on('data', data => processRemoteInputData(data) ))
+const altServer = "9000-peers-peerjsserver-bxw59h3fm87.ws-eu47.gitpod.io" 
+//new Peer("2022xrkbd", {host: altServer}).on('connection', conn => conn.on('data', data => processRemoteInputData(data) ))
+// disabled for now
+function processRemoteInputData( data ){
+	// .status : keydown keyup pointermove
+		// on keydown or keyup, result un .key
+		// on pointermove, result un .x and .y
+
+	// could try to throw back as an event...
+	parseKeys( data.status, data.key )
+	if (data.status == "pointermove") parsePointer( data.x, data.y )
+}
+
+// for testing purposes, disable when not local with asset caching server
+// SSE on a specific route to know if this file was updated, if so reload (would force leave VR) cf Inventing on Principle
+/*
+const source = new EventSource("streaming");
+source.onmessage = message => { 
+		console.log(message.data) // showing the updates without manually forcing a reload
+		if ((JSON.parse(message.data)).status == "reload" ) location.reload(true); 
+	} ;
+*/
+// monitored server-side, index.js with fs
+
+/* extrusion and more generally compactness of 3D object description :
+
+	Constructive Solid Geometry  (CSG) https://openjscad.nodebb.com/topic/235/threejs-integration/11 as example of integration of JSCAD (modelling with code basically) with threejs, naively looks like an interesting intersection, ideally with spacial editing after (i.e pinching a vertex to update the resulting geometry)
+*/
+
+// consider PinePhone keyboard as something more usable that BT rollable
+	// PeerJS/WS(S) to share key.events
+	// would also work with iPad keyboard ... or another other device with keyboard and browser.
+
+// refactoring : consider pluggable execution models and targets e.g eval(), containers, Observable, etc
+	// right now all mashed up together so creates both complexity and security risk
+
+// consider also STT and translation experiment
+// Codex by OpenAI (cf EP account) https://beta.openai.com/account/api-keys stored on ~/.openai-codex-test-xr used via backend
+// with token e.g JWT could also consider ~/.bashrc ~/.bin or ~/Prototypes as commands
+	// esp. those allowing to integrate with specific hardware
+
+// load as page loads
+// <a-text target observablecell="targetid:observablehq-numberOfPages-835aa7e9" position="0 1.55 -0.2" scale="0.1 0.1 0.1"></a-text>
+// interactive
+// <a-text target value="jxr obsv observablehq-numberOfPages-835aa7e9" position="0 1.55 -0.2" scale="0.1 0.1 0.1"></a-text>
+
+function newNoteFromObservableCell( cell ){
+	var targetEl = document.querySelector("#"+cell)
+	var potentialRes = document.querySelector("#observablehq-numberOfPages-835aa7e9>span")
+	if (potentialRes && potentialRes.children[1]){
+	  addNewNote( potentialRes.children[1].innerText ) 
+		return
+	}
+
+	let observer = new MutationObserver(mutationRecords => {
+	  addNewNote( mutationRecords[0].addedNodes[0].children[1].innerText ) 
+	});
+
+	observer.observe(targetEl, {
+	  childList: true, // observe direct children
+	  subtree: true, // and lower descendants too
+	  characterDataOldValue: true // pass old data to callback
+	})
+}
+
+AFRAME.registerComponent('observablecell', { // non interactive mode
+  schema: {
+	  targetid: {type: 'string'}
+  },
+  init: function () {
+	var el = this.el
+	var targetEl = document.querySelector("#"+this.data.targetid)
+	let observer = new MutationObserver(mutationRecords => {
+	  addNewNote( mutationRecords[0].addedNodes[0].children[1].innerText )
+	});
+
+	observer.observe(targetEl, {
+	  childList: true, // observe direct children
+	  subtree: true, // and lower descendants too
+	  characterDataOldValue: true // pass old data to callback
+  });
+}})
+
+// might mess thing up on Quest somehow... like typing does not seem to work anymore since.
+
+/*
+const registerServiceWorker = async () => {
+  if ('serviceWorker' in navigator) {
+    try {
+      const registration = await navigator.serviceWorker.register(
+        'sw-test/sw.js',
+        {
+          scope: '',
+        }
+      );
+      if (registration.installing) {
+        console.log('Service worker installing');
+      } else if (registration.waiting) {
+        console.log('Service worker installed');
+      } else if (registration.active) {
+        console.log('Service worker active');
+      }
+    } catch (error) {
+      console.error(`Registration failed with ${error}`);
+    }
+  }
+};
+*/
+
+// 2 modes : interact/display (see the .hidableenvironment class)
+	// interact : small scale, 3D model of impact visible, keyboard visible, instruction visible
+	// display : changeable scale, everything but content not visible
+
+// could try new movements dedicated to modifying text, in particular dedicated to coding
+	// e.g replacing a word by an expression el sa color red => dropping qs elname on el => qs elname sa color red
+
+// for snapping display the current position (like now)
+	// and future position as transparency when within a certain radius to target + offset
+	// see getClosestTargetElement( pos ) when an object is already selected an moving
+	// only snap there if within certain distance
+
+// replace console with an in VR equivalent, at least during the try/catch of eval() to get some feedback
+
+function displaySnappablePositions( position ){
+	// to show while moving an object
+	// has to be close enough (below threshold)
+}
+
+function coloredBlocksFromScreens(colors, el){
+	// those are NOT updated at the moment
+	colors.map( (u,i) => {
+		var e = document.createElement("a-box")
+		e.setAttribute("color", u.split(" ")[1])
+		e.setAttribute("position",`2 1.8 -${i}`)
+		e.setAttribute("width","0.2")
+		e.setAttribute("depth","0.2")
+		el.appendChild(e)
+	})
+}
+
+function imagesFromURLs(urls, el, classes=null){
+	urls.map( (u,i) => {
+		var e = document.createElement("a-image")
+		if (u.indexOf("http")>-1)
+			e.setAttribute("src", u)
+		else
+			e.setAttribute("src", `screens/${u}`)
+		//e.setAttribute("position",`0 1.8 -${i}`)
+		e.setAttribute("position",`0 1.1 -${i/50}`) // flight mode
+		e.setAttribute("rotation",`-30 0 0`) // flight mode
+		e.setAttribute("scale", ".05 .05 .05") // have to scale down here otherwise move interactions aren't good
+		// could instead rely on https://github.com/visjs/vis-timeline
+		// as previously used  in https://mobile.twitter.com/utopiah/status/1110576751577567233
+		e.setAttribute("width","2")
+		if (classes) e.className += classes
+		
+		el.appendChild(e)
+		targets.push(e)
+	})
+}
+
+function URLs(urls, el){
+	urls.map( (u,i) => {
+		var e = document.createElement("a-text")
+		e.setAttribute("value", u.split(" ")[1])
+		e.setAttribute("position",`-1 1.25 -${i}`)
+		// incorrect as screens (and their average color) are done per minute but URL done per change of tab
+		//does not help, should be a text property instead 
+		// e.setAttribute("width","10")
+		e.setAttribute("text", "wrapCount","200")
+		// el.appendChild(e) // disabled in flight mode
+	})
+}
+
+function stringWithPositionFromCoordinates(pos){
+	var el = getClosestTargetElement( pos, 0.5 )
+	// loosen up the threshold as we normally pick from the top left
+
+	// assumes a lot :
+		// NO rotation of the text, at all!
+		// single line of text
+		// scale only of 1 depth and uniform scaling
+		// left aligned
+		// probably only positive values
+	var selectedGlyph = {}
+	selectedGlyph.index = -1 // if we get an empty string
+	selectedGlyph.element = el
+	if (!el) return selectedGlyph
+	var glyph = el.object3D.children[0].geometry.visibleGlyphs
+	const matches = glyph.map( (t,i) => {
+			return {
+				el: el,
+				dist : Math.abs( pos.x - (
+					el.object3D.position.x + t.position[0]/(150/el.object3D.scale.x) ) ),
+				index : i
+			}
+		})
+		.filter( t => t.dist < 0.5 )
+		.sort( (a,b) => a.dist - b.dist )
+		// https://twitter.com/utopiah/status/1532766336941686784
+	if (matches.length > 0) {
+		selectedGlyph.index = matches[0].index
+	}
+	return selectedGlyph
+}
+
+function plot(equation,variablename="x",scale=5,step=1){
+	// could delete the past one document.querySelector("#plot")
+	// but nice to compare curves... should rather avoid adding grids instead.
+	var plot = document.querySelector("#plot")
+	if (!plot){
+		plot = document.createElement("a-entity")
+		targets.push(plot) // adding only once
+		plot.setAttribute("position", "0 1.5 -.5") // convenient position to test on desktop
+		plot.setAttribute("scale", ".01 .01 .01")
+		var idx = 0
+		for (var i=-scale;i<=scale;i+=step){
+			xl = `start: ${-scale} ${i} 0; end : ${scale} ${i} 0; opacity: 1;`
+			// weirdest "trick"... something using only `` on setAttribute produces empty string
+			// but indirecting once by setting a variable make the following one work?!
+			plot.setAttribute("line__"+ ++idx, xl)
+			plot.setAttribute("line__"+ ++idx, `start: ${i} ${-scale} 0; end : ${i} ${scale} 0; opacity: 1;`)
+		}
+		xaxis = `start: ${-scale} 0 0; end : ${scale} 0 0; opacity: 1; color:white;`
+		plot.setAttribute("line__axis_x", xaxis)
+		plot.setAttribute("line__axis_y", `start: 0 ${-scale} 0; end : 0 ${scale} 0; opacity: 1; color:white;`)
+		plot.setAttribute("line__axis_z", `start: 0 0 ${-scale}; end : 0 0 ${scale}; opacity: 1; color:white;`)
+		plot.id = "plot"
+		AFRAME.scenes[0].appendChild( plot )
+	}
+	var previousPoint = null
+	var curveId = +Date.now()
+	idx = 0
+	for (var i=-scale;i<=scale;i+=step/10){
+		var pos = i + " " + eval( "x="+i +";"+ equation) + " .1"
+		if (previousPoint) {
+			plot.setAttribute("line__user"+curveId+"section"+ ++idx, 'start: ' + previousPoint+ '; end : ' + pos + '; color:red;')
+		}
+		previousPoint = pos
+	}
+	// variablename seems unused
+}
+
+AFRAME.registerComponent('target', {
+  init: function () {
+	targets.push( this.el )
+	this.el.classList.add("collidable")
+  }
+})
+
+AFRAME.registerComponent('line-link-entities', {
+  schema: {
+    source: {type: 'selector'},
+    target: {type: 'selector'},
+    steps: {type: 'number', default: 1},
+  },
+  init: function () {
+    let generatorName = this.attrName
+    setTimeout( _ => { // stupid... but works. 
+ 	    if (!this.data.source || !this.data.target) return
+	    var sourcePos = this.data.source.object3D.position
+	    var targetPos = this.data.target.object3D.position
+ 	    if (!sourcePos || !targetPos) return // might not be needed anymore
+	    // adding a gltf inside an element prevents the parent from having coordinates (fast enough?)
+	    var step = 0
+	    var points = cut ([sourcePos, targetPos], 0, ++step)
+	    points = cut (points, 0, ++step)
+	    points = cut (points, points.length-2, step)
+	    var el = this.el
+	    el.className += generatorName
+	    points.map( (p,i,arr) => {
+	      if (arr[i+1])
+		el.setAttribute("line__"+i, "start:" + AFRAME.utils.coordinates.stringify( arr[i] ) + ";end: " +  AFRAME.utils.coordinates.stringify( arr[i+1] ) )      
+	    })
+    }, 100 ) // could check instead if both elements have loaded
+    
+    function cut(points, pos, step){
+      var a = points[pos]
+      var b = points[pos+1]
+      var midPos = new THREE.Vector3()
+      midPos.copy(a).add(b).divideScalar(2)
+      midPos.z -= a.distanceTo(b)/(step*10) // smoothed out but axis aligned
+      return [...points.slice(0,pos+1), midPos, ...points.slice(pos+1)]
+    }
+  }
+});
+
+function tryCachedImageOtherwiseRenderLive(pages){
+	let urls = []
+	pages.map( i => {
+		let cached = baseCachedURL + i.group + "_" + i.name + imageExtension
+		urls.push( cached )
+		fetch( cached).then( res => res.status ).then( r => { if (r==404) 
+			// console.log("try to get new one", r, cached)
+			replaceCachedImageByLive(i.group, i.name)
+		} )
+	})
+	return urls
+}
+
+function replaceCachedImageByLive(group, name){
+	const live = baseLiveURL+group+"_"+name+imageExtension
+	fetch( live ).then( res => res.status ).then( r => {
+		if (r==200) 
+		// check if in the "new" cache before doing a live query first
+			document.querySelector("[src='"+baseCachedURL+group+"_"+name+imageExtension+"']")
+				.setAttribute("src", live)
+		else
+			fetch( queryFormatBaseURL+group+"/"+name+renderSuffix ).then( res => res.json() )
+			.then( document.querySelector("[src='"+baseCachedURL+group+"_"+name+imageExtension+"']")
+				.setAttribute("src", live)
+			)
+	} )
+}
+
+AFRAME.registerComponent('screenstack', {
+// this could be potentially be replaced with web-url
+  init: function () {
+	//load()
+	//if (cabin && cabin.length > 0) return // test doesn't seem to work well on new page / 1st load
+		  // see CEREMA project, seems to handle caching better
+	var el = this.el
+	let generatorName = this.attrName
+	fetch(wikiAsImages).then(response => response.json()).then(data =>
+		imagesFromURLs(
+			tryCachedImageOtherwiseRenderLive(
+				Object.entries(data.Nodes).map(( [k, v] ) => { return {group:v.Group, name:v.Label} } ).slice(0,maxItems)
+			)
+		, el, generatorName )
+	)
+	// example time sorting
+	/* fetch('/screens').then(response => response.json()).then(data => console.log(
+		  data.files.filter( i => i.indexOf("_000") < 0 ).map( i => Number(i.replace(".png", "")) ).filter( i => i > now-60 ) 
+	) )
+        */
+
+	// works only locally for privacy reasons.
+	//fetch('colors.txt').then(response => response.text()).then(data => coloredBlocksFromScreens(data.split("\n").splice(-maxItems), el))
+	// timings should match as colors are generated from the screens
+
+	//fetch('currentURL.txt').then(response => response.text()).then(data => URLs(data.split("\n").splice(-maxItems), el ))
+	// could slice the array based on dates and e.g limit on current day or last 24hrs
+  }
+});
+
+function getClosestTargetElements( pos, threshold=0.05 ){ 
+	// TODO Bbox intersects rather than position
+	return targets.filter( e => e.getAttribute("visible") == true).map( t => { return { el: t, dist : pos.distanceTo(t.getAttribute("position") ) } })
+		.filter( t => t.dist < threshold ) 
+		.sort( (a,b) => a.dist > b.dist)
+}
+
+function getClosestTargetElement( pos, threshold=0.05 ){ // 10x lower threshold for flight mode
+	var res = null
+	const matches = getClosestTargetElements( pos, threshold)
+	if (matches.length > 0) res = matches[0].el
+	return res
+}
+	
+/*
+alternatively could looks for the intersecting bounding boxes of all targets
+then from those pick the closest one (again based on center)
+
+Both work well... but without any depth/thickness the chance of intersection are null...
+extruding the plane to a volume on a known axis, e.g z here (no rotation) is trivial but limiting.
+
+Could rely on the bounding sphere instead but not ideal when text is beside other pieces of text
+
+Note that in practice we plan to bring geometry with the text, a la Scratch, to showcase grammar and potential to combine.
+Consequently those problems would probably go away by intersecting with that geometry instead.
+
+That still means an efficient solution, e.g convex hull or BVH
+*/
+
+// e.g addBackgroundBoxToTextElements( targets.filter( e => e.localName == "a-text" ) )
+// note that background is "just" for the user in the sense that an invisible bounding box is enough for interactions
+function addBackgroundBoxToTextElements( textElements ){
+	textElements.map( el => {
+
+		addBoundingBoxToTextElement( el )
+
+		var bbox = new THREE.Box3().setFromObject( el.object3D.children[0] )
+			// the text element itself has no volume whereas its first children is a mesh
+		var scale = el.getAttribute("scale").x // assume being uniform
+		var box = document.createElement("a-box")
+		el.appendChild( box )
+		box.setAttribute("width", (bbox.max.x - bbox.min.x) * 1/scale)
+		box.setAttribute("height", (bbox.max.y - bbox.min.y) * 1/scale)
+		box.setAttribute("depth", scale)
+		box.setAttribute("position", (bbox.max.x - bbox.min.x) * (1/scale) / 2 + " 0 " + -scale/2+0.0001 )
+
+		setTimeout( _ => { // AFrame induced delay
+			// should check instead how to make sure an object is indeed created.
+				// maybe via el.getObject3D()
+			var compoundbbox = new THREE.Box3().setFromObject( box.object3D )
+			compoundbbox.expandByObject( el.object3D )
+			var helperbox = new THREE.BoxHelper( box.object3D, 0x00ff00);
+			helperbox.update();
+			AFRAME.scenes[0].object3D.add(helperbox);
+			/*
+			var helpercompound = new THREE.BoundingBoxHelper( compoundbbox, 0x0000ff);
+			helpercompound.update();
+			AFRAME.scenes[0].object3D.add(helpercompound);
+			*/
+		}, 100)
+	})
+}
+
+function addBoundingBoxToTextElement( el ){
+	var meshEl = el.object3D.children.filter( e => (e.type == "Mesh") )[0]
+	var helper = new THREE.BoxHelper(meshEl, 0xff0000);
+		// otherwise doesn't work with icon...
+	helper.update();
+	AFRAME.scenes[0].object3D.add(helper);
+	el.setAttribute("box-uuid", helper.uuid )
+	groupHelpers.push( helper )
+}
+
+function removeBoundingBoxToTextElement( el ){
+	var uuid = el.getAttribute("box-uuid")
+	el.removeAttribute("box-uuid")
+	//AFRAME.scenes[0].object3D.traverse( e => { if (e.uuid == uuid) e.removeFromParent() })
+	//AFRAME.scenes[0].object3D.traverse( e => { if (e.uuid == uuid) AFRAME.scenes[0].object3D.remove(e) })
+	AFRAME.scenes[0].object3D.traverse( e => { console.log(e.uuid == uuid) })
+	AFRAME.scenes[0].object3D.traverse( e => { if (e.uuid == uuid) console.log("found", e)})
+		// somehow removing did work before ...
+}
+
+function groupSelectionToNewNote(){
+	var text = ""
+	groupSelection.map( grpel => {
+		//removeBoundingBoxToTextElement( grpel )
+			// somehow fails...
+		text += grpel.getAttribute("value") + "\n"
+	})
+	groupHelpers.map( e => e.removeFromParent() )
+	groupHelpers = []
+	groupSelection = []
+	addNewNote( text )
+}
+
+function addToGroup( position ){
+	var el = getClosestTargetElement( position )
+	if (!el) return
+	groupSelection.push( el )
+	addBoundingBoxToTextElement( el )
+}
+
+function appendToFeedbackHUD(txt){
+	setFeedbackHUD( document.querySelector("#feedbackhud").getAttribute("value") + " " + txt )
+}
+
+function setFeedbackHUD(txt){
+	document.querySelector("#feedbackhud").setAttribute("value",txt)
+	setTimeout( _ => document.querySelector("#feedbackhud").setAttribute("value","") , 2000) 
+}
+
+function appendToHUD(txt){
+	const textHUD = document.querySelector("#typinghud").getAttribute("value") 
+	if ( textHUD == startingText)
+		setHUD( txt )
+	else
+		setHUD( textHUD + txt )
+}
+
+function setHUD(txt){
+	document.querySelector("#typinghud").setAttribute("value",txt)
+}
+
+AFRAME.registerComponent('waistattach',{
+  schema: {
+    target: {type: 'selectorAll'},
+  },
+  init: function () {
+	var el = this.el
+	this.worldPosition=new THREE.Vector3();
+  },
+  tick: function () {
+	var worldPosition=this.worldPosition;
+	worldPosition.copy(this.el.object3D.position);this.el.object3D.parent.updateMatrixWorld();this.el.object3D.parent.localToWorld(worldPosition)
+	Array.from( this.data.target ).map( t => {
+		t.object3D.position.x = worldPosition.x
+		t.object3D.position.z = worldPosition.z
+	})
+  },
+});
+
+AFRAME.registerComponent('attach',{
+  schema: {
+    target: {type: 'selector'},
+  },
+  init: function () {
+	var el = this.el
+	this.worldPosition=new THREE.Vector3();
+  },
+  tick: function () {
+	  var worldPosition=this.worldPosition;
+	  worldPosition.copy(this.el.position);
+	  this.el.parent.updateMatrixWorld();
+	  this.el.parent.localToWorld(worldPosition)
+	  rotation = this.el.rotation.x*180/3.14 + " " + this.el.rotation.y*180/3.14 + " " + this.el.rotation.z*180/3.14
+	  this.data.target.setAttribute("rotation", rotation)
+	  this.data.target.setAttribute("position",
+		  AFRAME.utils.coordinates.stringify( worldPosition ) )
+  },
+  remove: function() {
+  }
+});
+
+AFRAME.registerComponent('wristattachsecondary',{
+  schema: {
+    target: {type: 'selector'},
+  },
+  init: function () {
+	var el = this.el
+	this.worldPosition=new THREE.Vector3();
+  },
+  tick: function () {
+	// could check if it exists first, or isn't 0 0 0... might re-attach fine, to test
+		  // somehow very far away... need to convert to local coordinate probably
+		  // localToWorld?
+	(primarySide == 0) ? secondarySide = 1 : secondarySide = 0
+	var worldPosition=this.worldPosition;
+	this.el.object3D.traverse( e => { if (e.name == "wrist") {
+		worldPosition.copy(e.position);e.parent.updateMatrixWorld();e.parent.localToWorld(worldPosition)
+		rotation = e.rotation.x*180/3.14 + " " + e.rotation.y*180/3.14 + " " + e.rotation.z*180/3.14
+		this.data.target.setAttribute("rotation", rotation)
+		this.data.target.setAttribute("position",
+				AFRAME.utils.coordinates.stringify( worldPosition ) )
+			  // doesnt work anymore...
+		//this.data.target.setAttribute("rotation", AFRAME.utils.coordinates.stringify( e.getAttribute("rotation") )
+	  }
+	})
+  },
+  remove: function() {
+	// should remove event listeners here. Requires naming them.
+  }
+});
+
+AFRAME.registerComponent('pinchsecondary', { 
+  init: function () {
+	this.el.addEventListener('pinchended', function (event) {
+		selectedElement = getClosestTargetElement( event.detail.position )
+		selectedElements.push({element:selectedElement, timestamp:Date.now(), primary:false})
+		// if close enough to a target among a list of potential targets, unselect previous target then select new
+		if (selectedElement) interpretJXR( selectedElement.getAttribute("value") )
+		selectedElement = null
+		if (setupMode) setupBBox["B"] = event.detail.position
+		if ( setupBBox["A"] && setupBBox["B"] ) {
+			setupMode = false
+			setFeedbackHUD( JSON.stringify(setupBBox))
+		}
+		/*
+		selectionPinchMode = false
+		setHUD( AFRAME.utils.coordinates.stringify( bbox.min ),
+			AFRAME.utils.coordinates.stringify( bbox.max ) )
+		bbox.min.copy( zeroVector3 )
+		bbox.man.copy( zeroVector3 )
+	       */
+	});
+	this.el.addEventListener('pinchmoved', function (event) {
+		if (selectionPinchMode){
+			bbox.min.copy( event.detail.position )
+			setFeedbackHUD( "selectionPinchMode updated min")
+			if (!bbox.max.equal(zeroVector3))
+				selectionBox.update();
+		}
+	});
+	this.el.addEventListener('pinchstarted', function (event) {
+		if (!selectionPinchMode) bbox.min.copy( zeroVector3 )
+		if (selectionPinchMode) setFeedbackHUD( "selectionPinchMode started")
+	});
+  },
+  remove: function() {
+	// should remove event listeners here. Requires naming them.
+  }
+});
+
+AFRAME.registerComponent('pinchprimary', { // currently only 1 hand, the right one, should be switchable
+
+// consider instead https://github.com/AdaRoseCannon/handy-work/blob/main/README-AFRAME.md for specific poses
+// or https://aframe.io/aframe/examples/showcase/hand-tracking/pinchable.js 
+
+  init: function () {
+	var el = this.el
+	this.el.addEventListener('pinchended', function (event) { 
+		// if positioned close enough to a target zone, trigger action
+			// see own trigger-box component. Could use dedicated threejs helpers instead.
+				// https://github.com/Utopiah/aframe-triggerbox-component/blob/master/aframe-triggerbox-component.js#L66
+			// could make trigger zones visible as debug mode
+		var closests = getClosestTargetElements( event.detail.position )
+		//if (closests && closests.length > 0) // avoiding self reference
+		//	setFeedbackHUD("close enough, could stack with "+ closests[1].el.getAttribute("value") )
+		var dist = event.detail.position.distanceTo( document.querySelector("#box").object3D.position )
+		if (dist < .1){
+			setFeedbackHUD("close enough, replaced shortcut with "+ selectedElement.getAttribute("value") )
+			wristShortcut = selectedElement.getAttribute("value")
+		}
+		if (selectedElement){
+			let content = selectedElement.getAttribute("value")
+			if (content && immersClient && immersClient.connected){
+				immersClient.place.location = {
+					position: AFRAME.utils.coordinates.stringify(event.detail.position),
+					rotation: AFRAME.utils.coordinates.stringify( selectedElement.getAttribute("rotation") )
+				};
+				immersClient.sendChatMessage(content, "public"); 
+			}
+			selectedElements.push({element:selectedElement, timestamp:Date.now(), primary:true})
+			selectedElement.emit('released')
+		}
+		// unselect current target if any
+		selectedElement = null;
+		save()
+		if (setupMode) setupBBox["A"] = event.detail.position
+			// somehow keeps on setting up... shouldn't once done.
+		if ( setupBBox["A"] && setupBBox["B"] ) {
+			setupMode = false
+			setFeedbackHUD( JSON.stringify(setupBBox))
+		}
+		if ( drawingMode ) draw( event.detail.position )
+		if ( groupingMode ) addToGroup( event.detail.position )
+		selectionPinchMode = false
+		/*
+		setHUD( AFRAME.utils.coordinates.stringify( bbox.min ),
+			AFRAME.utils.coordinates.stringify( bbox.max ) )
+		bbox.min.copy( zeroVector3 )
+		bbox.man.copy( zeroVector3 )
+	       */
+		setTimeout( _ => primaryPinchStarted = false, 200) // delay otherwise still activate on release
+	
+		var newPinchPos = new THREE.Vector3()
+		newPinchPos.copy(event.detail.position )
+		pinches.push({position:newPinchPos, timestamp:Date.now(), primary:true})
+		dl2p = distanceLastTwoPinches()
+
+	});
+	this.el.addEventListener('pinchmoved', function (event) { 
+		// move current target if any
+		if (selectionPinchMode){
+			bbox.max.copy( event.detail.position )
+			if (!bbox.min.equal(zeroVector3))
+				selectionBox.update();
+		}
+		if (selectedElement && !groupingMode) {
+			selectedElement.setAttribute("position", event.detail.position)
+			document.querySelector("#rightHand").object3D.traverse( e => {
+				if (e.name == "ring-finger-tip"){
+					selectedElement.object3D.rotation.copy( e.rotation )
+				}
+			})
+			// rotation isn't ideal with the wrist as tend not have wrist flat as we pinch
+		}
+		if (selectedElement) selectedElement.emit("moved")
+	});
+	this.el.addEventListener('pinchstarted', function (event) {
+		primaryPinchStarted = true
+		if (!selectionPinchMode) bbox.max.copy( zeroVector3 )
+
+		//var clone = getClosestTargetElement( event.detail.position ).cloneNode()
+		// might want to limit cloning to unmoved element and otherwise move the cloned one
+		//AFRAME.scenes[0].appendChild( clone )
+		//targets.push( clone )
+		//selectedElement = clone
+
+		selectedElement = getClosestTargetElement( event.detail.position )
+		if (selectedElement) selectedElement.emit("picked")
+		// is it truly world position? See https://github.com/aframevr/aframe/issues/5182
+		// setFeedbackHUD( AFRAME.utils.coordinates.stringify( event.detail.position ) )
+		// if close enough to a target among a list of potential targets, unselect previous target then select new
+	});
+  },
+  remove: function() {
+	// should remove event listeners here. Requires naming them.
+  }
+});
+
+// testing on desktop
+function switchToWireframe(){
+	visible = !visible
+	/*
+	targets.map( e => {
+			scale = 50// should be a variable instead
+			e.setAttribute("scale", visible ? ".05 .05 .05" : ".1 .1 .1" )
+			var pos = AFRAME.utils.coordinates.parse( e.getAttribute("position") )
+			//visible ? pos.z *= scale : pos.z /= scale // might be the opposite but anyway give the principle
+			e.setAttribute("position", AFRAME.utils.coordinates.stringify(pos))
+			// should actually be just for src, not for text notes... even though could be interesting
+	})
+	*/
+	var model = document.querySelector("#environment").object3D
+	model.traverse( o => { if (o.material) {
+			o.material.wireframe = visible;
+			o.material.opacity = visible ? 0.05 : 1;
+			o.material.transparent = visible;
+	} })
+}
+
+// add (JXR) shortcuts as PIM function from e.g https://observablehq.com/@utopiah/from-pim-to-2d-to-3d-to-xr-explorations
+	// allowing to search within PIM then show manipulable pages as preview.
+
+// note that can be tested in VR also as jxr switchToWireframe()
+	// could make for nice in VR testing setup as eved notes
+
+function enterSetupMode(){
+	// rely on 2 pinches to create a bounding box of safe interaction
+	// https://threejs.org/docs/#api/en/math/Box3.containsBox
+	setupMode = true
+}
+
+AFRAME.registerComponent('start-on-press', {
+	// should become a property of the component instead to be more flexible.
+	init: function(){
+		var el = this.el
+		this.el.addEventListener('pressedended', function (event) { 
+			if (!primaryPinchStarted && wristShortcut.match(prefix)) interpretJXR(wristShortcut)
+			// other action could possibly based on position relative to zones instead, i.e a list of bbox/functions pairs
+		})
+	}
+})
+//---- other components : ------
+// could become like https://twitter.com/utopiah/status/1264131327269502976
+	// can include a mini typing game to warm up finger placement
+
+function distanceLastTwoPinches(){
+	let dist = null
+	if (pinches.length>1){
+		dist = pinches[pinches.length-1].position.distanceTo( pinches[pinches.length-2].position )
+	}
+	return dist
+}
+
+function startSelectionVolume(){
+	selectionPinchMode = true
+	// see setupBBox in pinchprimary and pinchsecondary
+	// then addBoundingBoxToTextElement()
+}
+// note that the bbox with vertical position model is still interesting
+	// (if within bounding box, try to execute code)
+	// because it allows grouping and sequentially rather executing line by line
+	// see https://threejs.org/docs/#api/en/math/Box3.containsBox
+
+// save pose of targets and src locally and if available on PIM
+/*
+savingJSON = targets.map( e => {
+	rot : e.getAttribute("rotation"),
+	pos : e.getAttribute("position"), 
+	scale : e.getAttribute("scale"), 
+	src : e.getAttribute("src"), 
+	value : e.getAttribute("value"), 
+})
+*/
+// load alt set of items e.g from https://observablehq.com/@utopiah/from-pim-to-2d-to-3d-to-xr-explorations
+	// or https://fabien.benetou.fr/pub/home/pimxr-experimentation/sources.json
+
+// position should be configurable as rotation is handled by the OS
+
+function parsePointer( x,y ){
+		console.log(x,y)
+	if (!sketchEl) {
+		sketchEl = document.createElement("a-entity")
+		// sketchEl.setAttribute("position", "0 1.4 -0.3") otherwise lines don't align
+			// could counter that offset but might be problematic later on with translations/rotations
+		targets.push( sketchEl )
+		AFRAME.scenes[0].appendChild(sketchEl)
+	}
+	var el = document.createElement("a-sphere")
+	var pos = x/1000 + " " + y/1000 + " 0"
+		// should offset and flip properly
+	el.setAttribute("position", pos)
+	el.setAttribute("radius", 0.01)
+	el.setAttribute("color", "green")
+	sketchEl.appendChild( el )
+	if (lastPointSketch){
+		var oldpos = AFRAME.utils.coordinates.stringify( lastPointSketch.getAttribute("position") )
+		sketchEl.setAttribute("line__"+ Date.now(), `start: ${oldpos}; end : ${pos};`)
+	}
+	lastPointSketch = el
+	
+}
+
+function parseKeys(status, key){
+	var e = hudTextEl
+	if (status == "keyup"){
+		if (key == "Control"){
+			groupingMode = false
+			groupSelectionToNewNote()
+		}
+	}
+	if (status == "keydown"){
+		var txt = e.getAttribute("value") 
+		if (txt == "[]") 
+			e.setAttribute("value", "")
+		if (key == "Backspace" && txt.length)
+			e.setAttribute("value", txt.slice(0,-1))
+		if (key == "Control")
+			groupingMode = true
+		if (key == "Shift" && selectedElement)
+			e.setAttribute("value", selectedElement.getAttribute("value") )
+		else if (key == "Enter") {
+			if ( selectedElement ){
+				var clone = selectedElement.cloneNode()
+				clone.setAttribute("scale", "0.1 0.1 0.1")  // somehow lost
+				AFRAME.scenes[0].appendChild( clone )
+				targets.push( clone )
+				selectedElement = clone
+			} else {
+				if (txt.match(prefix)) interpretJXR(txt)
+				// check if text starts with jxr, if so, also interpret it.
+				addNewNote(e.getAttribute("value"))
+				e.setAttribute("value", "")
+			}
+		} else {
+		// consider also event.ctrlKey and multicharacter ones, e.g shortcuts like F1, HOME, etc
+			if (key.length == 1)
+				e.setAttribute("value", e.getAttribute("value") + key )
+		}
+		save()
+	}
+}
+
+var keyboardInputTarget = 'hud'
+AFRAME.registerComponent('hud', {
+	init: function(){
+		var feedbackHUDel= document.createElement("a-troika-text")
+		feedbackHUDel.id = "feedbackhud"
+		feedbackHUDel.setAttribute("value", "")
+		feedbackHUDel.setAttribute("position", "-0.05 0.01 -0.2") 
+		feedbackHUDel.setAttribute("scale", "0.05 0.05 0.05") 
+		this.el.appendChild( feedbackHUDel )
+		var typingHUDel = document.createElement("a-troika-text")
+		typingHUDel.id = "typinghud"
+		typingHUDel.setAttribute("value", startingText)
+		typingHUDel.setAttribute("position", "-0.05 0 -0.2") 
+		typingHUDel.setAttribute("scale", "0.05 0.05 0.05") 
+		this.el.appendChild( typingHUDel )
+		hudTextEl = typingHUDel // should rely on the id based selector now
+		document.addEventListener('keyup', function(event) {
+			if (keyboardInputTarget != 'hud') return
+			parseKeys('keyup', event.key)
+		});
+		document.addEventListener('keydown', function(event) {
+			if (keyboardInputTarget != 'hud') return
+			parseKeys('keydown', event.key)
+		});
+	}
+})
+
+function addNewNote( text, position=`-0.2 1.1 -0.1`, scale= "0.1 0.1 0.1", id=null, classes="notes", visible="true", rotation="0 0 0" ){
+	var newnote = document.createElement("a-troika-text")
+	newnote.setAttribute("anchor", "left" )
+	newnote.setAttribute("outline-width", "5%" )
+	newnote.setAttribute("outline-color", "black" )
+	newnote.setAttribute("visible", visible )
+
+	if (id) 
+		newnote.id = id
+	else
+		newnote.id = "note_" + Date.now() // not particularly descriptive but content might change later on
+	if (classes)
+		newnote.className += classes
+	newnote.setAttribute("side", "double" )
+	var userFontColor = AFRAME.utils.getUrlParameter('fontcolor')
+	if (userFontColor && userFontColor != "") 
+		newnote.setAttribute("color", userFontColor )
+	else 
+		newnote.setAttribute("color", fontColor )
+	if (text.match(prefix))
+		newnote.setAttribute("color", codeFontColor )
+	newnote.setAttribute("value", text )
+	//newnote.setAttribute("font", "sw-test/Roboto-msdf.json")
+	newnote.setAttribute("position", position)
+	newnote.setAttribute("rotation", rotation)
+	newnote.setAttribute("scale", scale)
+	AFRAME.scenes[0].appendChild( newnote )
+	targets.push(newnote)
+	return newnote
+}
+
+function interpretAny( code ){
+
+	if (!code.match(/^dxr /)) return
+	var newcode = code
+	newcode = newcode.replace("dxr ", "")
+	//newcode = newcode.replace(/bash ([^\s]+)/ ,`debian '$1'`) // syntax delegated server side
+	fetch("/command?command="+newcode).then( d => d.json() ).then( d => {
+		console.log( d.res )
+		appendToHUD( d.res ) // consider shortcut like in jxr to modify the scene directly
+		// res might return that said language isn't support
+			// commandlistlanguages could return a list of supported languages
+	})
+}
+
+var pastPoints = []
+function draw( position ){
+	let drawingMoment = +Date.now() // might not be fast enough to get a UUID
+	let uniqueId = Date.now().toString(36) + Math.random().toString(36).substring(2);
+	// from https://stackoverflow.com/a/44078785/1442164
+	let pos = AFRAME.utils.coordinates.stringify( position )
+	// add sphere per point
+	let el = document.createElement("a-sphere")
+	let drawing
+	el.setAttribute("position", pos)
+	el.setAttribute("radius", 0.001)
+	el.setAttribute("color", "lightblue")
+	el.setAttribute("dateadded", drawingMoment )
+	// if previous point exist, draw line between both
+	if (pastPoints.length) {
+		let previousPoint = pastPoints[pastPoints.length-1] // should check time, e.g max 1s
+		drawing = previousPoint.element.parentElement
+		let oldpos = AFRAME.utils.coordinates.stringify( previousPoint.position )
+		drawing.setAttribute("line__"+ uniqueId, `start: ${oldpos}; end : ${pos};`)
+	} else {
+		drawing = document.createElement("a-entity")
+		drawing.className = "drawing"
+		AFRAME.scenes[0].appendChild( drawing )
+	}
+	drawing.appendChild( el )
+	// if sufficiently close to another sphere (the first) close the loop
+	if (pastPoints.length>1) {
+		let lastPoint = pastPoints[pastPoints.length-1]
+		let oldpos = AFRAME.utils.coordinates.stringify( lastPoint.position )
+		let lastPosV3 = new THREE.Vector3().copy( lastPoint.position )
+		if (lastPosV3.distanceTo( position ) < 0.1) // threshold
+			drawing.setAttribute("line__"+ drawingMoment + "_closeloop", `start: ${oldpos}; end : ${pos};`)
+			// then enter extrude mode (assume they are on 1 plane)
+			// should also prevent from adding points to the current drawing
+			// before investing too much effort in this, should consider how it would actually improve usage
+			// especially as we can add AFrame primitives with the keyboard
+				// intersection of kbd and hand tracked 6DoF being the primary usage
+	}
+
+	pastPoints.push({position:pos, element:el, timestamp: drawingMoment})
+	/* test values, must wait .1 second between otherwise there is no known position
+		(most likely AFrame to threejs delay)
+	draw( new THREE.Vector3(-0.04, 1.7, -1) );
+	draw( new THREE.Vector3(0.04, 1.7, -1) );
+	draw( new THREE.Vector3(0, 1.72, -1) );
+	*/
+
+
+}
+
+// the goal is to associate objects as shape with volume to code snippet
+function addGltfFromURLAsTarget( url, scale=1, position="0 1.7 -0.3" ){
+	var el = document.createElement("a-entity")
+	AFRAME.scenes[0].appendChild(el)
+	el.setAttribute("gltf-model", url)
+	el.setAttribute("position", position) 
+	el.setAttribute("scale", scale + " " + scale + " " + scale)
+	targets.push(el)
+
+	return el
+	// consider https://sketchfab.com/developers/download-api/downloading-models/javascript
+}
+
+function showhistory(){
+	setFeedbackHUD("history :\n")
+	commandhistory.map( i => appendToHUD(i.uninterpreted+"\n") )
+}
+
+function saveHistoryAsCompoundSnippet(){
+	addNewNote( commandhistory.map( e => e.uninterpreted ).join("\n") )
+}
+
+function bindVariableValueToNewNote(variableName){
+	// from observe jxr keyword
+	const idName = "bindVariableValueToNewNote"+variableName
+	addNewNote( variableName + ":" + eval(variableName), `-0.15 1.4 -0.1`,  "0.1 0.1 0.1", idName, "observers", "true" )
+	// could add to the HUD instead and have a list of these
+	return setInterval( _ => {
+		const value = variableName+";"+eval(variableName)
+		// not ideal for DOM elements, could have shortcuts for at least a-text with properties, e.g value or position
+		document.getElementById(idName).setAttribute("value", value)
+	}, 100 )
+}
+
+function parseJXR( code ){
+// should make reserved keywords explicit.
+	var newcode = code
+	newcode = newcode.replace("jxr ", "")
+	newcode = newcode.replace(/(\d)s (.*)/ ,`setTimeout( _ => { $2 }, $1*1000)`)
+
+	// qs X => document.querySelector("X")
+	newcode = newcode.replace(/qs ([^\s]+)/ ,`document.querySelector('$1')`)
+
+	// sa X Y => .setAttribute("X", "Y")
+	newcode = newcode.replace(/ sa ([^\s]+) (.*)/,`.setAttribute('$1','$2')`)
+		// problematic for position as they include spaces
+
+	newcode = newcode.replace(/obsv ([^\s]+)/ ,`newNoteFromObservableCell('$1')`)
+
+	// TODO
+	//<a-text target value="jxr observe selectedElement" position="0 1.25 -0.2" scale="0.1 0.1 0.1"></a-text>
+	newcode = newcode.replace(/observe ([^\s]+)/,`bindVariableValueToNewNote('$1')`)
+	// could proxy instead... but for now, the quick and dirty way :
+
+	// e.g qs a-sphere sa color red => 
+	// document.querySelector("a-sphere").setAttribute("color", "red")
+
+	newcode = newcode.replace(/lg ([^\s]+) ([^\s]+)/ ,`addGltfFromURLAsTarget('$1',$2)`)
+	// order matters, here we only process the 2 params if they are there, otherwise 1
+	newcode = newcode.replace(/lg ([^\s]+)/ ,`addGltfFromURLAsTarget('$1')`)
+	return newcode
+}
+
+function interpretJXR( code ){
+	if (!code) return
+	if (code.length == 1) { // special case of being a single character, thus keyboard
+		if (code == ">") { // Enter equivalent
+			content =  hudTextEl.getAttribute("value") 
+			if (Number.isFinite(Number(content))) {
+				loadPageRange(Number(content));
+			} else {
+				addNewNote( content )
+			}
+			setHUD("")
+		} else if (code == "<") { // Backspace equivalent
+			setHUD( hudTextEl.getAttribute("value").slice(0,-1))
+		} else {
+			appendToHUD( code )
+		}
+	}
+	if (!code.match(prefix)) return
+	var uninterpreted = code
+	var parseCode = ""
+	code.split("\n").map( lineOfCode => parseCode += parseJXR( lineOfCode ) + ";" )
+	// could ignore meta code e.g showhistory / saveHistoryAsCompoundSnippet
+	commandhistory.push( {date: +Date.now(), uninterpreted: uninterpreted, interpreted: parseCode} )
+	
+	console.log( parseCode )
+	try {
+		eval( parseCode )
+	} catch (error) {
+		console.error(`Evaluation failed with ${error}`);
+	}
+
+	// unused keyboard shortcuts (e.g BrowserSearch) could be used too
+	// opt re-run it by moving the corresponding text in target volume
+}
+
+AFRAME.registerComponent('toolbox', { // ununsed
+	init: function(){
+		var el = this.el
+		var e = document.createElement("a-sphere")
+		e.setAttribute("scale", "0.1 0.1 0.1")
+		e.setAttribute("color", "lightblue")
+		e.setAttribute("pressable")
+		e.id = "toolboxsphere"
+		el.appendChild( e )
+		var e = document.createElement("a-cylinder")
+		e.setAttribute("scale", "0.1 0.1 0.1")
+		e.setAttribute("color", "darkred")
+		e.setAttribute("pressable")
+		e.id = "toolboxcylinder"
+		el.appendChild( e )
+		var e = document.createElement("a-box")
+		e.setAttribute("scale", "0.1 0.1 0.1")
+		e.setAttribute("color", "pink")
+		e.setAttribute("pressable")
+		e.id = "toolbox"
+		el.appendChild( e )
+	},
+	tick: function(){
+		var toolbox = document.querySelector("#toolbox")
+		var cam = document.querySelector("[camera]")
+		toolbox.object3D.position.x = cam.getAttribute("position").x-0.5
+		toolbox.object3D.position.z = cam.getAttribute("position").z+0.2
+		//toolbox.object3D.rotation.y = cam.getAttribute("rotation").y
+	}
+})
+
+// from https://aframe.io/aframe/examples/showcase/hand-tracking/pressable.js
+AFRAME.registerComponent('pressable', {
+	schema:{pressDistance:{default:0.06}},
+	init:function(){this.worldPosition=new THREE.Vector3();this.handEls=document.querySelectorAll('[hand-tracking-controls]');this.pressed=false;},
+	tick:function(){var handEls=this.handEls;var handEl;var distance;for(var i=0;i<handEls.length;i++){handEl=handEls[i];distance=this.calculateFingerDistance(handEl.components['hand-tracking-controls'].indexTipPosition);if(distance<this.data.pressDistance){if(!this.pressed){this.el.emit('pressedstarted');} this.pressed=true;return;}} if(this.pressed){this.el.emit('pressedended');} this.pressed=false;},
+	calculateFingerDistance:function(fingerPosition){var el=this.el;var worldPosition=this.worldPosition;worldPosition.copy(el.object3D.position);el.object3D.parent.updateMatrixWorld();el.object3D.parent.localToWorld(worldPosition);return worldPosition.distanceTo(fingerPosition);}
+});
+
+AFRAME.registerComponent('selectionboxonpinches', {
+	init:function(){
+		AFRAME.scenes[0].object3D.add(selectionBox);
+	}
+})
+
+AFRAME.registerComponent('keyboard', {
+	init:function(){
+		let generatorName = this.attrName
+		const horizontaloffset = .7
+		const horizontalratio = 1/20
+		alphabet.map( (line,ln) => {
+		 for (var i = 0; i < line.length; i++) {
+			var pos = i * horizontalratio - horizontaloffset
+                        addNewNote( line[i], pos+" "+(1.6-ln*.06)+" -.4", ".1 .1 .1", null, generatorName)
+		 }
+		})
+	}
+})
+	
+AFRAME.registerComponent('capturegesture', {
+	init:function(){this.handEls=document.querySelectorAll('[hand-tracking-controls]');},
+	tick:function(){
+		document.querySelector("#rightHand").object3D.traverse( e => { if (e.name == "b_r_wrist") console.log("rw", e.rotation) })
+		document.querySelector("#leftHand" ).object3D.traverse( e => { if (e.name == "b_l_wrist") console.log("rl", e.rotation) })
+			// should look up thumb-metacarpal and index-finger-metacarpal if not sufficient
+				// might trickle down iif wrist rotation itself is already good
+			// https://immersive-web.github.io/webxr-hand-input/
+	}
+});
+
+AFRAME.registerComponent('timeline', {
+        init:function(){
+		let generatorName = this.attrName
+                fetch("../content/fot_timeline.json").then(res => res.json() ).then(res => {
+                        res.fot_timeline.slice(0,maxItemsFromSources).map( (c,i) => addNewNote( c.year+"_"+c.event, "1 "+i/10+" -1", ".1 .1 .1", null, generatorName) ) 
+                })
+        },
+});
+
+AFRAME.registerComponent('glossary', {
+	init:function(){
+		let generatorName = this.attrName
+		fetch("content/glossary.json").then(res => res.json() ).then(res => {
+			Object.values(res.entries).slice(0,maxItemsFromSources).map( (c,i) => addNewNote( c.phrase + c.entry.slice(0,50)+"..." , "-1 "+i/10+" -1", ".1 .1 .1", null, generatorName) ) 
+		})
+	},
+});
+
+AFRAME.registerComponent('fot', {
+	init:function(){
+		this.tick = AFRAME.utils.throttleTick(this.tick, 500, this);
+	},
+	tick: function(){
+		let generatorName = this.attrName
+		fetch("https://fabien.benetou.fr/PIMVRdata/FoT?action=source#" + Date.now()).then(res => res.text() ).then(res => {
+			res.split("\n").slice(0,maxItemsFromSources).map( (n,i) => {
+				found = added.find((str) => str === n)
+				if (typeof found === 'undefined'){
+					added.push(n)
+					addNewNote( n, "-1 "+(1+i/10)+" -2.5", ".1 .1 .1", null, generatorName ) 
+				}
+			})
+		})
+	}
+});
+
+AFRAME.registerComponent('issues', {
+	init:function(){
+		let generatorName = this.attrName
+		// fetch("https://api.github.com/repos/Utopiah/relax-plus-think-space/issues").then(res => res.json() ).then(res => {
+		fetch("https://git.benetou.fr/api/v1/repos/utopiah/text-code-xr-engine/issues").then(res => res.json() ).then(res => {
+			res.slice(0,maxItemsFromSources).map( (n,i) => addNewNote( n.title, "0 "+(1+i/10)+" -1.8", ".1 .1 .1", null, generatorName ) )
+		})
+	},
+});
+
+AFRAME.registerComponent('dynamic-view', {
+	init:function(){
+		let generatorName = this.attrName
+		fetch("content/DynamicView.json").then(res => res.json() ).then(res => {
+			res.nodes.slice(0,maxItemsFromSources).map( n => addNewNote( n.title, "" + res.layout.nodePositions[n.identifier].x/100 + " " + res.layout.nodePositions[n.identifier].y/100 + " -1", ".1 .1 .1", null, generatorName ) )
+		})
+	},
+});
+
+function toggleVisibilityEntitiesFromClass(classname){
+	let entities = Array.from( document.querySelectorAll("."+classname) )
+	if (entities.length == 0) return
+	let state = entities[0].getAttribute("visible") // assume they are all the same
+	if (state)
+		entities.map( e => e.setAttribute("visible", "false"))
+	else
+		entities.map( e => e.setAttribute("visible", "true"))
+}
+
+function pushLeftClass(classname, value=.1){
+	Array.from( document.querySelectorAll("."+classname) ).map( e => e.object3D.position.x -= value)
+}
+
+function pushRightClass(classname, value=.1){
+	Array.from( document.querySelectorAll("."+classname) ).map( e => e.object3D.position.x += value)
+}
+
+function pushUpClass(classname, value=.1){
+	Array.from( document.querySelectorAll("."+classname) ).map( e => e.object3D.position.y += value)
+}
+
+function pushDownClass(classname, value=.1){
+// can be used for accessibiliy, either directly or sampling e.g 10s after entering VR to lower based on the estimated user height
+	Array.from( document.querySelectorAll("."+classname) ).map( e => e.object3D.position.y -= value)
+}
+
+function pushBackClass(classname, value=.1){
+	Array.from( document.querySelectorAll("."+classname) ).map( e => e.object3D.position.z -= value)
+}
+
+function pushFrontClass(classname, value=.1){
+	Array.from( document.querySelectorAll("."+classname) ).map( e => e.object3D.position.z += value)
+}
+
+function toggleVisibilityAllGenerators(){
+	generators.split(" ").map( g => toggleVisibilityEntitiesFromClass(g) )
+	// not hidableassets though
+}
+
+function toggleVisibilityAll(){
+	toggleVisibilityAllGenerators()
+	toggleVisibilityEntitiesFromClass("hidableassets")
+}
+
+function toggleVisibilityAllButClass(classname){
+	generators.split(" ").filter( e => e != classname).map( g => toggleVisibilityEntitiesFromClass(g) )
+	toggleVisibilityEntitiesFromClass("hidableassets")
+}
+
+AFRAME.registerComponent('adjust-height-in-vr', {
+	init: function(){
+		AFRAME.scenes[0].addEventListener("enter-vr", _ => {
+			setTimeout( _ => { // getting the value right away returns 0, so short delay
+				userHeight = document.querySelector("#player").object3D.position.y
+				// assume the user does not change, some might prefer to use standing up first then sit down.
+					// otherwise explicit controls
+				heightAdjustableClasses.map( c => {
+					max = Math.max.apply(null, Array.from( document.querySelectorAll("."+c) ).map( e => e.object3D.position.y) )	
+					min = Math.min.apply(null, Array.from( document.querySelectorAll("."+c) ).map( e => e.object3D.position.y) )	
+					pushDownClass(c, userHeight - (max-min)/2 )
+					setFeedbackHUD( "adjusted height by:" + ( userHeight - (max-min)/2 ) )
+				} )
+			}, 100 )
+		})
+	}
+})
+
+AFRAME.registerComponent('commands-from-external-json', {
+/*
+// following discussion with Yanick
+
+// for cabin.html to faciliate growth and flexibility
+
+fetch('./commands.json') // then load like A-Frame elements
+// e.g command //{name,defaultpose,autorun,description}
+// could even be stored as wiki page
+
+fetch('./templates.json')
+// e.g [commands with optional pose]
+
+// watch can be a template too
+	<a-text side="double" networked="template:#text-template;attachTemplateToLocal:false;" id="instructionA" value="Interactive instructions:" position="0 1.5 -0.2" scale="0.2 0.2 0.2"></a-text>
+	<a-text side="double" id="instructionB" target value="jxr lg Fox.glb 0.001" position="0 1.65 -0.2" scale="0.1 0.1 0.1">
+		<a-entity gltf-model="Fox.glb" scale="0.005 0.005 0.005"></a-entity>
+	</a-text>
+	<a-text side="double" networked="template:#text-template;attachTemplateToLocal:false;" id="instructionC" target value="jxr obsv observablehq-numberOfPages-835aa7e9" position="0 1.55 -0.2" scale="0.1 0.1 0.1"></a-text>
+	<a-text side="double" networked="template:#text-template;attachTemplateToLocal:false;" id="instructionD" target value="jxr 1s startSelectionVolume()" position="0 1.50 -0.2" scale="0.1 0.1 0.1"></a-text>
+*/
+	init:function(){
+		var el = this.el
+		let generatorName = this.attrName
+		var links = [ // could be in the commands file instead
+			"target:#instructionA; source:#instructionB",
+			"target:#instructionA; source:#instructionC",
+			"target:#instructionA; source:#instructionD",
+		]
+		links = []
+		//fetch("commands.json").then(res => res.json() ).then(res => {
+		var commandsURL = "https://fabien.benetou.fr/PIMVRdata/CabinCommands?action=source"
+		commandsURL = "https://fabien.benetou.fr/PIMVRdata/EngineSequentialTutorialCommands?action=source" // new default
+		var src = AFRAME.utils.getUrlParameter('commands-url')
+		if (src && src != "") commandsURL = src
+		fetch(commandsURL).then(res => res.json() ).then(res => {
+			// to consider for remoteLoad/remoteSave instead, to distinguish from url though.
+			// also potential security concern so might insure that only a specific user, with mandatory password access, added commands.
+			var visible = true
+			if (c.visible) visible = c.visible
+			res.map( c => addNewNote( c.value, c.position, c.scale, c.id, generatorName, c.visible) )
+				// missing name/title, autorun (true/false), description, 3D icon/visual, visiblity (useful for sequential tutorial)
+			links.map( l => { var linkEl = document.createElement("a-entity"); 
+					 linkEl.setAttribute("line-link-entities", l)
+					 el.appendChild(linkEl) 
+			} )
+			var hideRest = AFRAME.utils.getUrlParameter('commands-hide-rest')
+			if (hideRest && hideRest != "") setTimeout( _ => toggleVisibilityAllButClass('commands-from-external-json'), 5000) // waiting for everything to have loaded...
+		})
+	},
+});
+
+function save(){
+	var data = targets.map( e => { return {
+			localname: e.localName,
+			src: e.getAttribute("src"),
+			position: e.getAttribute("position"),
+			rotation: e.getAttribute("rotation"),
+			scale: e.getAttribute("scale"),
+			value: e.getAttribute("value"),
+		} } )
+	cabin = data
+	localStorage.setItem('cabin', JSON.stringify( data) )
+	return data
+	// could be called on page exit, unsure if reliable in VR
+	// alternatively could be call after each content is moved or created
+}
+
+function load(){
+	if (localStorage.getItem('cabin'))
+		cabin = JSON.parse(localStorage.getItem('cabin'))
+	cabin.map( e => {
+		var newel = document.createElement(e.localname)
+		savedProperties.map( p => {
+			if (e[p] ) newel.setAttribute(p, e[p])
+		})
+		AFRAME.scenes[0].appendChild( newel )
+	})
+}
+
+function remoteLoad(){
+	fetch(url+'source') 
+		.then( response => { return response.json() } )
+		.then( data => { console.log("remote data:", data) })
+	// does actually load back. Should consider what load() does instead.
+
+	// for the reMarkable write back in source, OCR/HWR could be done on the WebXR device instead
+		// alternatively "just" sending the .jpg thumbnail would be a good enough start
+		// note that highlights are also JSON files
+		// both might not be ideal directly in the original JSON but could be attachement as URLs
+}
+
+function remoteSave(){
+	  fetch(url+'edit', {
+		  method: 'POST',
+		  headers: {'Content-Type':'application/x-www-form-urlencoded'},
+		  body: "post=1&author=PIMVR&authpw=edit_password&text="+JSON.stringify( cabin )
+	  }).then(res => res).then(res => console.log("saved remotely", res))
+}
+
+function switchSide(){
+	// mostly works... but event listeners are not properly removed. Quickly creates a mess, low performance and unpredictable.
+	document.querySelector("#"+sides[primarySide]+"Hand").removeAttribute("pinchprimary")
+	document.querySelector("#"+sides[secondarySide]+"Hand").removeAttribute("pinchsecondary")
+	document.querySelector("#"+sides[secondarySide]+"Hand").removeAttribute("wristattachsecondary")
+	document.querySelector("#"+sides[secondarySide]+"Hand").setAttribute("pinchprimary", "")
+	document.querySelector("#"+sides[primarySide]+"Hand").setAttribute("pinchsecondary", "")
+	document.querySelector("#"+sides[primarySide]+"Hand").setAttribute("wristattachsecondary", "target: #box")
+	if (primarySide == 0) {
+		secondarySide = 0
+		primarySide = 1
+	} else {
+		primarySide = 0
+		secondarySide = 1
+	}
+}
+
+function cloneAndDistribute(){
+	el = document.querySelector("a-box[src]") // page
+	// trying instead to rely on previously selected matching element and dl2p
+
+	// lack visual feedback to show what is indeed lastly selected or the distance found
+	//el = selectedElements[selectedElements.length-2] // not current command
+	times = Math.floor(dl2p*10) // also assume it's been done properly
+	if (times < 2) times = 7
+	
+	offset = .5
+	 for (var i = 0; i < times ; i++) { // equivalent of Blender array modifier
+		let newEl = el.cloneNode() 
+		AFRAME.scenes[0].appendChild(newEl) // takes time...
+		setTimeout( setZ, 100, {el: newEl, z: -1-i*offset} )
+		newEl.addEventListener('hasLoaded', function (event) {
+			//this.object3D.position.z = i*offset
+			console.log("loaded") // doesnt seem to happen
+		})
+	 }
+
+	function setZ(params){
+		params.el.object3D.position.z = params.z
+	}
+}
+
+function loadPageRange(start=1, end=-1, startPosition={x:0, y:1.3, z:-.7}, stepVector={x:.2, y:0, z:0}){
+	const baseURL = "https://fabien.benetou.fr/pub/home/future_of_text_demo/content/book_as_png/gfg_d-"
+	const extension = ".png"
+
+	// assumes portrait A4-ish
+	var rootEl = AFRAME.scenes[0]
+	if (end<0) end = start
+	
+	let step = 0
+	for (let i=start; i<=end; i++){
+		step++
+		let el = document.createElement("a-box")
+		el.setAttribute("target", true)
+		//el.setAttribute("position", ""+ step/5+ " 1.3 -.7") // could be based on selectedElements last position instead
+		let pos = "" + startPosition.x+stepVector.x*step + " " + startPosition.y+stepVector.y*step + " " + startPosition.z+stepVector.z*step 
+		el.setAttribute("position", pos)
+		// layout system could be parametric, e.g over x or y or z or another system
+		el.setAttribute("width", ".1")
+		el.setAttribute("height", ".15")
+		el.setAttribute("depth", ".01")
+		pageNumber = i
+		if (pageNumber<10) pageNumber = "0"+pageNumber
+		if (pageNumber<100) pageNumber = "0"+pageNumber
+		el.setAttribute("src", baseURL+pageNumber+extension)
+		el.setAttribute("pagenumber", pageNumber)
+		el.id = pageNumber + "_" + Date.now()
+		rootEl.appendChild(el)
+		let posInterface = "" + startPosition.x+stepVector.x*step + " " + startPosition.y+1+stepVector.y*step + " " + startPosition.z+stepVector.z*step 
+		let UI = addNewNote("jxr nextPage('"+el.id+"')", posInterface, "0.1 0.1 0.1", el.id+"_interface")
+		//el.setAttribute("attach","target:#"+el.id+"_interface")
+	}
+}
+
+function writeWebDAV(){
+	const webdavurl = "https://webdav.benetou.fr";
+	const client = window.WebDAV.createClient(webdavurl)
+	async function w(path = "/file.txt"){ return await client.putFileContents(path, "SpaSca test"); }
+	w("/fot.txt") // need new permissions
+}
+
+function getPagesFromWebDAV(){
+	const webdavurl = "https://webdav.benetou.fr";
+	const client = window.WebDAV.createClient(webdavurl)
+	async function getDirectory(path = "/"){ return await client.getDirectoryContents(path); }
+	getDirectory("book_as_png").then( d => d.sort( (a,b) => (a.filename>b.filename)).slice(0,10).map( (c,i) => addPageFromURL(webdavurl+c.filename)))
+}
+
+function addPageFromURL(url){
+	if (url.indexOf(".png")<0) return
+	let el = document.createElement("a-box")
+	el.setAttribute("position", -Math.random()+" "+Math.random()*3 + " -1")
+	el.setAttribute("width", ".1")
+	el.setAttribute("height", ".15")
+	el.setAttribute("depth", ".01")
+	el.setAttribute("src", url)
+	AFRAME.scenes[0].appendChild(el)
+	return el
+}
+
+function getModelsFromWebDAV(){
+	const webdavurl = "https://webdav.benetou.fr";
+	const client = window.WebDAV.createClient(webdavurl)
+	async function getDirectory(path = "/"){ return await client.getDirectoryContents(path); }
+	getDirectory("models").then( d => d.sort( (a,b) => (a.filename>b.filename)).slice(0,10).map( (c,i) => addModelFromURL(webdavurl+c.filename)))
+}
+
+function addModelFromURL(url){
+	return addNewNote("jxr lg "+url+ " 0.001", -Math.random()+" "+Math.random()*3 + " -1")
+	// should try boxing it instead in 1m3
+}
+
+// same principle to go from nextPage() to openingLinkedPages() from wiki URL
+	// consider screenstack, could add a note to mode further
+
+function loadWikiAsGraph(){
+	fetch(wikiAsImages).then(response => response.json()).then(data => {
+		Object.entries(data.Nodes).slice(0,maxItems).map( v => {
+			let pageName = v[0]
+			let targest = v[1].Targets
+			let el = addPageFromURL(baseLiveURL+pageName.replace(".","_")+imageExtension)
+			el.id = pageName
+			el.classname = "wikipage"
+			// should rely on tryCachedImageOtherwiseRenderLive(pages) instead
+			setTimeout( _ => { 
+				let pos = el.getAttribute("position")
+				let UI = addNewNote("jxr openFromNode('"+el.id+"')", pos, "0.1 0.1 0.1", el.id+"_interface")
+				console.log("should add: addNewNote('jxr openNewNode("+pageName+")')")
+			}, 100 ) // wait for the entity to be actually added
+			// to be coupled with loadCodeFromPage()
+				// see also the idea that each wiki page wouldn't just be descriptive but also have code
+					// related pages
+					// https://fabien.benetou.fr/Fabien/Principle
+					// https://fabien.benetou.fr/CognitiveEnvironments/CognitiveEnvironments
+					// https://fabien.benetou.fr/Cookbook/Cognition
+		})
+	})
+}
+
+function nextPage(id){
+console.log("nextpage()")
+	// assuming only direct parent for now
+	const baseURL = "https://fabien.benetou.fr/pub/home/future_of_text_demo/content/book_as_png/gfg_d-"
+	const extension = ".png"
+	let pageNumber = Number( id.split("_")[0] )
+console.log(pageNumber+1)
+	loadPageRange(pageNumber+1)
+}
+
+function loadCodeFromPage(url="https://fabien.benetou.fr/Analysis/BeyondTheCaseAgainstBooks?action=source"){
+	// alternatively could load from a page number
+	fetch(url)
+	.then( r => r.text() )
+	.then(data => { 
+		let code = data.split("\n").filter( l => (l.slice(0,2) == "[@") )[0].slice(2).slice(0,-2);
+		// example as PmWiki parsing
+		eval(code)
+	} )
+}
+
+function loadFromMastodon(statusesURL="https://mastodon.pirateparty.be/api/v1/accounts/56066/statuses"){
+	fetch(statusesURL).then( r => r.json() ).then( t => t.filter( i => i.in_reply_to_id == null ).map( (i,n) => {
+		let div = document.createElement("div")
+		div.innerHTML = i.content
+		addNewNote(div.innerText, "1 "+ (1.2+(n+1)/20) +" -0.4")
+	} ) )
+}
+
+const tile_extension = ".glb"
+
+// could become a dedicated asset sets, e.g asset-metadata.json in that directory
+const available_asset_kits = [
+	{
+		tile_URL : "../content/asset_kits/KenneyHexTiles/",
+		tiles : ["building_cabin", "building_castle", "building_dock", "building_farm", "building_house", "building_market", "building_mill", "building_mine", "building_sheep", "building_smelter", "building_tower", "building_village", "building_wall", "building_water", "dirt", "dirt_lumber", "grass", "grass_forest", "grass_hill", "path_corner", "path_cornerSharp", "path_crossing", "path_end", "path_intersectionA", "path_intersectionB", "path_intersectionC", "path_intersectionD", "path_intersectionE", "path_intersectionF", "path_intersectionG", "path_intersectionH", "path_start", "path_straight", "river_corner", "river_cornerSharp", "river_crossing", "river_end", "river_intersectionA", "river_intersectionB", "river_intersectionC", "river_intersectionD", "river_intersectionE", "river_intersectionF", "river_intersectionG", "river_intersectionH", "river_start", "river_straight", "sand", "sand_rocks", "stone", "stone_hill", "stone_mountain", "stone_rocks", "unit_boat", "unit_house", "unit_houseLarge", "unit_mill", "unit_tower", "unit_tree", "unit_wallTower", "water", "water_island", "water_rocks",],
+		tiles_types_full : [ "building_", "river_", "sand", "stone", "water"],
+		tiles_types_parts : [ "unit_", "path_" ],
+		hex_type : true,
+	},{
+		tile_URL : "../content/asset_kits/KenneyRetroMedieval/",
+		tiles_types_full : ["floor", "column", "tower", "wall"],
+		tiles_types_parts : ["battlement"],
+		tiles : [ "battlement", "battlement_cornerInner", "battlement_cornerOuter", "battlement_half", "column", "columnPaint", "columnPaint_damaged", "column_damaged", "detail_barrel", "detail_crate", "detail_crateSmall", "fence", "floor", "floor_flat", "floor_stairs", "floor_stairsCornerInner", "floor_stairsCornerOuter", "floor_steps", "floor_stepsCornerInner", "floor_stepsCornerOuter", "overhang", "overhang_fence", "overhang_round", "roof", "roof_corner", "roof_edge", "structure", "structure_poles", "structure_wall", "tower", "towerPaint", "towerPaint_base", "tower_base", "tower_edge", "tower_top", "wall", "wallFortified", "wallFortifiedPaint", "wallFortifiedPaint_gate", "wallFortifiedPaint_half", "wallFortified_gate", "wallFortified_gateHalf", "wallFortified_half", "wallPaint", "wallPaint_detail", "wallPaint_flat", "wallPaint_gate", "wallPaint_half", "wall_detail", "wall_flat", "wall_flatGate", "wall_gate", "wall_gateHalf", "wall_half", "wall_low" ],
+		hex_type : false,
+	}
+]
+
+var selected_asset_kit = 1
+
+// consider also a set of assets, e.g this one but also another kit from the same artist
+// consider the other direction, i.e how a single glTF could become a set of tiles
+
+function displayAllTiles(){
+	const scale = 1/10
+	let last_type = null
+	available_asset_kits[selected_asset_kit].tiles.map( (t) => {
+		let x = -1*scale
+		if (!last_type) n = 0
+		const tiles_types = [ ...available_asset_kits[selected_asset_kit].tiles_types_full, ...available_asset_kits[selected_asset_kit].tiles_types_parts]
+		tiles_types.map( (tile_type,ttn) => {
+			if (t.indexOf(tile_type) > -1) {
+				x = ttn/10 
+				if (tile_type != last_type) n = 0
+				last_type = tile_type
+			}
+		} )
+		let el = addGltfFromURLAsTarget( available_asset_kits[selected_asset_kit].tile_URL+t+tile_extension, 
+			.09,
+			""+x+" 0.7 -"+n*scale )
+		// fine tuning should also be per asset set
+		// el.class = ...
+		n++
+	} )
+	// could consider a new spawner type so that picking a tile clones it first
+		// could do same behavior as on release or on picked, namely register listener then act on event
+}
+// try generating at scale, e.g 2, a landscape to explore based on type
+	// with scale adjusting as jxr line to be the Wondering pills/drinks/mushroom to change scale
+		// cf similar commands to move a class, consequently could add class after addGltfFromURLAsTarget
+
+function randomTileFull(){
+	const tiles_full = available_asset_kits[selected_asset_kit].tiles.filter( t => { let present = false; available_asset_kits[selected_asset_kit].tiles_types_full.map(m => { if (t.indexOf(m)>-1) present = true; }); return present} )
+	return tiles_full[Math.floor(Math.random()*tiles_full.length)]
+}
+
+var tiles_snapping_grid = []
+
+function getClosestTilesSnappingPosition( t, threshold=0.05 ){
+	let point = null
+	let found = tiles_snapping_grid.map( i => { return { pos:i, dist: i.distanceTo(t) } } )
+		.filter( t => t.dist < threshold )
+		.sort( (a,b) => a.dist > b.dist)
+	if (found && found[0]) point = found[0].pos
+	return point
+}
+
+var tile_snapping_enabled = true
+
+AFRAME.registerComponent('snap-on-pinchended', {
+	init: function(){
+		let el = this.el
+		let clone
+		this.el.addEventListener('picked', function (event) {
+			if (tile_snapping_enabled) {
+				clone = el.object3D.clone() // worked with AFrame version but didnt get complex geometry
+				AFRAME.scenes[0].object3D.add( clone )
+				clone.traverse( c => {
+					if (c.type == "Mesh") {
+						c.material = c.material.clone()
+						c.material.opacity = .5
+						c.material.transparent = true
+					}
+				 } )
+			}
+		})
+		this.el.addEventListener('moved', function (event) {
+			if (tile_snapping_enabled) {
+				var pos = AFRAME.utils.coordinates.parse( el.getAttribute("position") )
+				pos.x = pos.x.toFixed(1) 
+				pos.y = pos.y.toFixed(1)
+				pos.z = pos.z.toFixed(1)
+				clone.position.set(pos.x, pos.y, pos.z)
+			}
+		})
+		this.el.addEventListener('released', function (event) {
+			if (tile_snapping_enabled) { // might generalize the name as now used for compound primitives too
+				el.setAttribute("rotation", "0 0 0")
+				// could limit to an axis or two, e.g here y axis probably should be kept or at least adjust to next 1/6th rotation
+				// could snap to invisible grid too, e.g every 1 or 1/10th unit 
+				var pos = AFRAME.utils.coordinates.parse( el.getAttribute("position") )
+				pos.x = pos.x.toFixed(1) // i.e .1m so 1/10th of a meter here, 10cm
+				pos.y = pos.y.toFixed(1)
+				pos.z = pos.z.toFixed(1)
+				// could check first if that "spot" is "free", e.g not other targets on that position
+					// but then if not, what? move to another of the closest 6th closest points? (2 vertical, 2 horizontal, 2 depth) or even 8th with diagonales?
+						// if not? now what? move until there is a free spot?
+				el.setAttribute("animation__snap"+Date.now(), "property: position; to: "+AFRAME.utils.coordinates.stringify(pos)+"; dur: 200;");
+				//el.setAttribute("position", AFRAME.utils.coordinates.stringify(pos))
+				//if (clone) clone.remove()
+				if (clone) AFRAME.scenes[0].object3D.remove( clone )
+
+				if (el.className == "compound_object"){
+					let thresholdDistance = 0.2 // based on object size
+					targets.filter( i => (
+						(i.className == el.className)
+						&& el.getAttribute("position").distanceTo(i.getAttribute("position")) == 0.2)
+						&& el.getAttribute("position").y == i.getAttribute("position").y
+						&& el.getAttribute("position").z == i.getAttribute("position").z
+						).map( _ => document.querySelector("#snapping-sound").components.sound.playSound() )
+				} // very restrictive, also doesn't repulse away
+
+			// if works, generalize and add to https://git.benetou.fr/utopiah/text-code-xr-engine/issues/66
+			// should come back from emit('released')
+			// could rely on getClosestTilesSnappingPosition()
+				// if it works, might check if position is not already used by a tile
+			}
+		})
+	}
+})
+
+function generateRandomPlace(max_i=10, max_j=10, scale=1/10, y=1.4){
+	// lifesize,  y :  -2, scale 1
+	// dollhouse, y : 1.4, scale 1/10
+	for (let i=0;i<max_i;i++){
+		for (let j=0;j<max_j;j++){
+			let offset_if_hex = 0
+			if (available_asset_kits[selected_asset_kit].hex_type && j%2) offset_if_hex = 1/2
+			let pos = new THREE.Vector3( (i+offset_if_hex)*scale, y, (j*8.5/10)*scale )
+			el = addGltfFromURLAsTarget( 
+				available_asset_kits[selected_asset_kit].tile_URL+randomTileFull()+tile_extension, 
+				1*scale, 
+				AFRAME.utils.coordinates.stringify( pos )
+			)
+			el.setAttribute('snap-on-pinchended', '')
+			el.className += "tiles"
+			tiles_snapping_grid.push( pos )
+		}
+	}
+}
+
+// could add behavior based on class or, maybe easier, add a snapping-after-release component
+// it would register an event listener and the released element would trigger an event
+
+function rescalePlace(scale = 10, yoffset=-1){
+	let places = Array.from( document.querySelectorAll(".tiles") )
+	tiles_snapping_grid = []
+	places.map( e => {
+		scl = e.getAttribute("scale"); e.setAttribute("scale", scl.x*scale+ " " + scl.y*scale + " " + scl.z*scale)
+		pos = e.getAttribute("position"); e.setAttribute("position", pos.x*scale+ " " + (pos.y+yoffset) + " " + pos.z*scale)
+		let pos3 = new THREE.Vector3( pos.x*scale, pos.y+yoffset, pos.z*scale )
+		tiles_snapping_grid.push( pos3 )
+	} )
+}
+
+function addScreenshot(){
+	screenshotcanvas = document.querySelector('a-scene').components.screenshot.getCanvas('perspective')	
+	var sel = document.createElement("a-image") // could use a flat box instead, or use it as a frame
+	AFRAME.scenes[0].appendChild(sel) 	
+	sel.setAttribute("src", screenshotcanvas.toDataURL() )
+	sel.setAttribute("height", .1)
+	sel.setAttribute("width", .2)
+	sel.setAttribute("position", "0 1.4 -0.1")
+	targets.push(sel)
+	return sel
+}
+
+function newPrimitiveWithOutline( name="box", position="0 0 0", scale=".1 .1 .1" ){
+	let el = document.createElement("a-"+name)
+	let el_outline = document.createElement("a-"+name)
+	el.appendChild(el_outline)
+	el.setAttribute("scale", scale)
+	el.setAttribute("position", position)
+	el_outline.setAttribute("scale", "1.01 1.01 1.01")
+	el_outline.setAttribute("color", "gray")
+	el_outline.setAttribute("wireframe", "true")
+	el_outline.className = "outline_object" 
+	return el
+}
+
+function addCompoundPrimitiveExample(position="0 1.4 -0.2"){
+	let el = generateCompoundPrimitiveExample(position)
+	AFRAME.scenes[0].appendChild(el)
+	targets.push(el)
+	el.setAttribute('snap-on-pinchended', true) // could set the parameter here, e.g sound if close to same type
+	return el
+}
+
+function addBlockCodeExample(text="hi", pos="0 1.4 -0.2", color="black", outlineColor="white"){
+	let el = addNewNote( text )
+	el.setAttribute("color", color)
+	el.setAttribute("outline-color", outlineColor)
+	el.setAttribute("position", pos)
+	let compountPrim = generateCompoundPrimitiveExample()
+	compountPrim.setAttribute("position", "0.1 0 -0.051")
+	el.appendChild(compountPrim)
+	// el.setAttribute('snap-on-pinchended', true) 
+	return el
+}
+
+function generateCompoundPrimitiveExample(position="0 1.4 -0.2"){
+	var el = document.createElement("a-entity")	
+	el.setAttribute("position", position)
+	el.id = "compound_object_" + Date.now()
+	el.className = "compound_object" 
+	let parts = []
+	parts.push( newPrimitiveWithOutline("box",           "0 0 0",     ".2 .1 .1") )
+	parts.push( newPrimitiveWithOutline("box",        ".125 0 0",  ".05 .05 .05") )
+	parts.push( newPrimitiveWithOutline("box",  "-.125 0.0375 0",  ".05 .025 .1") )
+	parts.push( newPrimitiveWithOutline("box", "-.125 -0.0375 0",  ".05 .025 .1") )
+	parts.push( newPrimitiveWithOutline("box",  "-.125 0 0.0375", ".05 .05 .025") )
+	parts.push( newPrimitiveWithOutline("box", "-.125 0 -0.0375", ".05 .05 .025") )
+	parts.map( p => el.appendChild(p) )
+	return el
+}
+
+function addPrimitive( name, position="0 1.4 -0.2" ){
+	let el = newPrimitiveWithOutline( name )
+	el.setAttribute("position", position)
+	AFRAME.scenes[0].appendChild(el)
+	el.id = "template_object_" + name
+	el.className = "template_object" 
+	targets.push(el)
+	el.setAttribute('clone-on-primarypinchstarted', true)
+	return el
+}
+
+AFRAME.registerComponent('clone-on-primarypinchstarted', { 
+  init: function () {
+	let el = this.el
+	this.el.addEventListener('picked', function (event) {
+		selectedElement = instanciateFromPrimitive( selectedElement )
+	})
+  }
+})
+
+function instanciateFromPrimitive(element){
+	var clone = element.cloneNode(true)
+	clone.removeAttribute('clone-on-primarypinchstarted')
+	clone.setAttribute( "scale", element.getAttribute("scale") ) // somehow lost?
+	clone.id += "_clone" + Date.now()
+	clone.className = "cloned"
+	targets.push(clone)
+	AFRAME.scenes[0].appendChild(clone)
+	return clone
+}
+
+function addAllPrimitives(){
+	const other_primitives = ["camera", "cursor", "sky", "light", "sound", "videosphere"]
+	const other_primitives_with_param_needed = ["text", "gltf-model", "obj-model", "troika-text"]
+	Object.getOwnPropertyNames(AFRAME.primitives.primitives)
+	// thanks to https://github.com/Utopiah/aframe-inVR-blocks-based-editor/blob/master/aframe-invr-inspect.js
+		.map( i => i.replace("a-",""))
+		.filter( i => other_primitives.indexOf(i) < 0 )
+		.filter( i => other_primitives_with_param_needed.indexOf(i) < 0 ) // temporarilty disabled
+		.map( (i,j) => addPrimitive( i, ""+ j/7 + " 1.4 -0.5" ) )
+}
+
+const eventHighlighterReady = new Event("highlighterready");
+var highlighter
+shiki.setCDN(jxrrootURL+'engine/'+'../content/shiki/') // see https://github.com/shikijs/shiki#specify-a-custom-root-directory
+shiki.getHighlighter({ theme: 'monokai', langs: ['javascript' ] }).then(h => { highlighter = h; document.body.dispatchEvent(eventHighlighterReady); } )
+	// see https://github.com/shikijs/shiki/blob/main/docs/languages.md 
+
+function highlight(code = `console.log("Here is your code."); var x = 5;`, language='javascript'){
+	if (!highlighter) return null
+	// check set colorRange if the result is {} which is the case when shiki highlighter isn't ready or available
+	const tokens = highlighter.codeToThemedTokens(code, language)
+	let pos=0
+	let colorRange={}
+	tokens.map( line => {
+		line.map( (t,i) => {
+			colorRange[pos] = t.color/*.replace("#","0x")*/
+			pos+=t.content.length
+		})
+		pos++
+	})
+	return colorRange
+}
+
+function startExperience(){
+	//fetch("https://fabien.benetou.fr/Tools/Docker?action=source").then(r=>r.text()).then( page => { addCodeEditor( page, "" ) })
+        //if (AFRAME.utils.device.checkHeadsetConnected()) AFRAME.scenes[0].enterVR();
+	//document.querySelector("#snapping-sound").components.sound.playSound();
+	document.querySelector("#mainbutton").style.display = "none"
+}
+
+// track created editors then apply actions to the currently selected one
+// problems happen when relying on querySelector/getElementById rather than a specific editor
+	// do these based on codeEditor.element rather than document	
+// still probably problematic for interactions
+	// consider for now only the currentEditor
+
+function nextLineCodeEditor(codeEditor, lines=1){ // can be negative to scroll up
+	if (codeEditor.line+lines < 0) return
+	codeEditor.line+=lines
+	let content=codeEditor.page.split("\n").slice(codeEditor.line,codeEditor.line+codeEditor.lengthWindowRange).join("\n"); 
+	codeEditor.currentlyDisplayedText=content
+	codeEditor.element.setAttribute("troika-text", {value: content})
+	if (codeEditor.language) codeEditor.element.setAttribute("troika-text", {colorRanges: highlight(content, language='javascript')})
+	let gutterEl = codeEditor.element.querySelector(".leftgutter")
+	if (gutterEl){
+		let lineNumbers = "\n"
+		for (let i=codeEditor.line+1;i<=codeEditor.line+codeEditor.lengthWindowRange;i++){
+			for (let pad=0;pad<String(getNumberOfLinesFromCodeEditor()).length-String(i).length; pad++)
+				lineNumbers+="_"
+			lineNumbers+=i+"\n"
+		}
+		gutterEl.setAttribute("troika-text", {value: lineNumbers})
+	}
+
+	let rightGutterEl = codeEditor.element.querySelector(".rightgutter")
+	if (rightGutterEl){
+		b = rightGutterEl.parentElement.object3D.children[0]._textRenderInfo.blockBounds
+		w = b[2]-b[0]
+		h = b[3]-b[1]
+		let scrollBarHeight = codeEditor.lengthWindowRange/codeEditor.page.match(/\n/g).length * h
+		let scrollBarVerticalOffset = codeEditor.line/codeEditor.page.match(/\n/g).length * h
+		if (scrollBarHeight < .1) scrollBarHeight = .1
+		rightGutterEl.object3D.position.y= h/2-scrollBarHeight/2 - scrollBarVerticalOffset
+	}
+}
+
+function nextPageCodeEditor(codeEditor){
+	nextLineCodeEditor(codeEditor, codeEditor.lengthWindowRange)
+}
+
+function previousPageCodeEditor(codeEditor){
+	nextLineCodeEditor(codeEditor, -codeEditor.lengthWindowRange)
+}
+
+function stopScrollCodeEditor(codeEditor){
+	codeEditor.scrollInterval = clearInterval( codeEditor.scrollInterval )
+}
+
+function startScrollCodeEditor(codeEditor){
+	if (!codeEditor.scrollInterval) codeEditor.scrollInterval = setInterval( _ => nextLineCodeEditor(codeEditor), 100)
+}
+
+function highlightAllOccurences(codeEditor, keyword="function"){
+	let indices = []
+	let lastfound = codeEditor.currentlyDisplayedText.indexOf(keyword,0)
+	while (lastfound>-1) {
+		indices.push(lastfound)
+		lastfound = codeEditor.currentlyDisplayedText.indexOf(keyword,lastfound+keyword.length)
+	}
+	indices.map( pos => {
+		let offset = (codeEditor.currentlyDisplayedText.slice(0,pos).match(/[\n\t ]/g)||[]).length
+		pos-=offset
+		highlightString(pos, keyword.length)
+	})
+}
+
+function hightlightNextKeyword(codeEditor, keyword="function"){
+	let pos = codeEditor.currentlyDisplayedText.indexOf(keyword)
+	// invisible characters... some still left
+	let offset = (codeEditor.currentlyDisplayedText.slice(0,pos).match(/[\n\t ]/g)||[]).length
+	pos-=offset
+	highlightString(pos, keyword.length)
+}
+
+function highlightString(codeEditor, pos, length){
+	for (let c=pos;c<pos+length;c++) highlightChar(codeEditor,  c )
+}
+
+// WARNING this is limited to visible characters, i.e not " " or "\t" or "\n"
+// should instead allow to highlight " " and "\t" both looking the same
+function highlightChar(codeEditor, pos=0, name=null){ // could have multiple selection
+	let b = Array.from( codeEditor.element.object3D.children[0].geometry.attributes.aTroikaGlyphBounds.array ).slice(pos*4,pos*4+4)
+	let w = b[2]-b[0]
+	let h = b[3]-b[1] // could be used to check for same line, if so could make a single block from beginning to end
+
+	let g = new THREE.BoxGeometry( w, h, .01  );
+	let m = new THREE.MeshBasicMaterial( {color: 0xffffff, opacity: 0.8, transparent: true} );
+	let c = new THREE.Mesh( g, m )
+	if (name) c.name = name
+	codeEditor.element.object3D.add( c );  
+
+	c.position.x= b[0]+w/2
+	c.position.y= b[1]+h/2
+	c.position.z= .01
+}
+
+function highlightUnderChar(codeEditor, pos=0, name=null){
+	let b = Array.from( codeEditor.element.object3D.children[0].geometry.attributes.aTroikaGlyphBounds.array ).slice(pos*4,pos*4+4)
+	// note that this skips invisible char and thus desync codeEditor.caret from actual position
+		// but, for now at least, " " and "\t" seems to be of equal value and "\n" does not shift on the current line
+		// currently we could count the invisible moving ones on this line and negative offset horizontally
+	let currentLineNumber = (codeEditor.currentlyDisplayedText.slice(0, pos ).match(/\n/g)||[]).length
+	let currentPositionOnLine = codeEditor.currentlyDisplayedText.slice(0, pos ).length
+		- codeEditor.currentlyDisplayedText.split("\n").slice(0,currentLineNumber).join("\n").length
+	console.log(currentPositionOnLine)
+// might need a special case for the beginning of the line... or rather maybe the position here is different, it's the number of the glyph
+// e.g "   x" x is not 3 but 0
+// we could also count then from the string but we don't have that, just pos as parameter. Some extra information might be needed.
+
+	let currentLineContent = codeEditor.currentlyDisplayedText.split("\n")[currentLineNumber].slice(0, currentPositionOnLine)
+	let invisibleOnCurrentLine = (currentLineContent.slice(0, currentPositionOnLine).match(/[\t ]/g)||[]).length
+	const spaceSize = .046 // hardcoded but changes per front so should be measured instead
+		// can be done via temptroikaobject.element.object3D.children[0].geometry.attributes.aTroikaGlyphBounds.array[0] for value " _"
+			// as a kind of calibration
+	let w = b[2]-b[0]
+	let h = b[3]-b[1] // could be used to check for same line, if so could make a single block from beginning to end
+//console.log(invisibleOnCurrentLine, currentLineContent)
+
+	let g = new THREE.BoxGeometry( w, .01, .01  );
+	let m = new THREE.MeshBasicMaterial( {color: 0xffffff, opacity: 0.8, transparent: true} );
+	let c = new THREE.Mesh( g, m )
+	if (name) c.name = name
+	codeEditor.element.object3D.add( c );
+
+	c.position.x= b[0]+w/2-invisibleOnCurrentLine*spaceSize
+	c.position.y= b[1]-.01
+	c.position.z= .01
+}
+
+function moveCaretToNextVisibleChar(codeEditor){
+	addCaretToCodeEditor( ++codeEditor.caret )
+	// might be able to reach non visible one by remove an offset
+}
+
+function addCaretToCodeEditor(codeEditor, pos=0){
+	if (codeEditor.caret) removeCaretFromCodeEditor(codeEditor)
+	highlightUnderChar(codeEditor, pos, "caret")
+	codeEditor.caret = pos
+}
+
+function removeCaretFromCodeEditor(codeEditor){
+	codeEditor.element.object3D.getObjectByName("caret").removeFromParent()
+}
+
+function clearCodeEditorContent(codeEditor){
+	updateCodeEditorWithContent( "" )
+}
+
+// should support a range, note the entire document (or window?)
+function searchAndReplaceInCodeEditor(codeEditor, before, after){
+	updateCodeEditorWithContent( codeEditor, codeEditor.currentlyDisplayedText.replaceAll(before, after))
+	// note that it desyncs from page so page should only be seen as the initial source
+		// this though would break scrolling which is based on page
+		// consequently page should be modified
+}
+
+function updateCodeEditorWithContent(codeEditor, content){
+	if (!codeEditor.element) return
+	codeEditor.currentlyDisplayedText=content
+	codeEditor.element.setAttribute("troika-text", {value: content})
+	if (codeEditor.language) codeEditor.element.setAttribute("troika-text", {colorRanges: highlight(content, codeEditor.language)})
+}
+
+function addBackdropToTroikaElement( codeEditor ){
+	let el = codeEditor.element
+	el.addEventListener("object3dset", e => {
+		el.object3D.children[0].addEventListener("synccomplete", e => {
+			// this can be used for resizing but without add the element
+			if (codeEditor.element.querySelector(".leftgutter")) return // already added, should unregister
+
+			b = el.object3D.children[0]._textRenderInfo.blockBounds
+			w = b[2]-b[0]
+			h = b[3]-b[1]
+
+			g = new THREE.BoxGeometry( w, h, .01  );
+			m = new THREE.MeshBasicMaterial( {color: 0, opacity: 0.9, transparent: true} );
+			c = new THREE.Mesh( g, m );
+			el.object3D.add( c );  
+			c.name = "backdrop"
+			c.position.z=-.01
+			c.position.x= w/2
+		})
+	})
+}
+
+function addGuttersToTroikaElement( codeEditor ){
+	let el = codeEditor.element
+	el.addEventListener("object3dset", e => {
+		el.object3D.children[0].addEventListener("synccomplete", e => {
+			if (codeEditor.element.querySelector(".leftgutter")) return 
+			// already added, should unregister, can be removed to allow dynamic resizing BUT should skip adding element
+	
+			b = el.object3D.children[0]._textRenderInfo.blockBounds
+			w = b[2]-b[0]
+			h = b[3]-b[1]
+
+			gutterWidth = .2 * String(getNumberOfLinesFromCodeEditor(codeEditor)).length
+			//should adjust width based on number of lines in total first
+			g = new THREE.BoxGeometry( gutterWidth, h, .01  );
+			m = new THREE.MeshBasicMaterial( {color: 0x333333, opacity: 0.9, transparent: true} );
+			c = new THREE.Mesh( g, m );
+			el.object3D.add( c );  
+			c.position.z=-.01
+			c.position.x= -gutterWidth/2
+			//c.rotation.y= .2 // looks nice but have to consider text on top first, could apply rotation to text too
+			var leftGutter = document.createElement("a-troika-text")
+			leftGutter.setAttribute("anchor", "left" )
+			leftGutter.setAttribute("outline-width", "5%" )
+			leftGutter.setAttribute("outline-color", "black" )
+			let lineNumbers = "\n"
+			for (let i=codeEditor.line+1;i<=codeEditor.line+codeEditor.lengthWindowRange;i++){
+				for (let pad=0;pad<String(getNumberOfLinesFromCodeEditor(codeEditor)).length-String(i).length; pad++)
+					lineNumbers+="_" // not using a fixed width font now so " " is smaller
+				lineNumbers+=i+"\n"
+			}
+			lineNumbers.slice(0,-1)
+			leftGutter.setAttribute("troika-text", {value: lineNumbers})
+			leftGutter.setAttribute("troika-text", {textIndent: -.5})
+			leftGutter.className = "leftgutter"
+			codeEditor.element.appendChild( leftGutter )
+			// should be updated when scrolling
+	
+			gutterWidth = .1
+			g = new THREE.BoxGeometry( gutterWidth, h, .01  );
+			m = new THREE.MeshBasicMaterial( {color: 0x333333, opacity: 0.9, transparent: true} );
+			c = new THREE.Mesh( g, m );
+			el.object3D.add( c );  
+			c.position.z=-.01
+			c.position.x= w+gutterWidth/2
+			//c.rotation.y= -.2 // looks nice but have to consider text on top first
+	
+			var rightGutter = document.createElement("a-cylinder")
+			// height proportional to the visible content to the terminal size
+			let scrollBarHeight = codeEditor.lengthWindowRange/getNumberOfLinesFromCodeEditor(codeEditor) * h
+			let scrollBarVerticalOffset = codeEditor.line/getNumberOfLinesFromCodeEditor(codeEditor) * h
+			if (scrollBarHeight < .1) scrollBarHeight = .1
+			rightGutter.setAttribute("height", scrollBarHeight )
+			rightGutter.setAttribute("radius", .01 )
+			rightGutter.className = "rightgutter"
+			// should become a constrained target (moving only on y axis and clamped)
+			codeEditor.element.appendChild( rightGutter )
+			// so... rightgutter vs rightGutter ... somehow changing to the "correct" one breaks the editor itself (?!)
+			rightGutter.object3D.position.x= w+gutterWidth/2
+			rightGutter.object3D.position.y= h/2-scrollBarHeight/2 - scrollBarVerticalOffset
+			// offset by line position proportional also then updated when scrolling
+			
+			gutterHeight = .3
+			g = new THREE.BoxGeometry( w, gutterHeight, .01  );
+			m = new THREE.MeshBasicMaterial( {color: 0x333333, opacity: 0.9, transparent: true} );
+			c = new THREE.Mesh( g, m );
+			el.object3D.add( c );  
+			c.position.z=-.01
+			c.position.y= -h/2-gutterHeight/2
+			c.position.x= w/2
+			//c.rotation.x= -.2 // looks nice but have to consider text on top first
+			// should add the commands here
+			var middleGutter = document.createElement("a-troika-text")
+			middleGutter.setAttribute("anchor", "left" )
+			middleGutter.setAttribute("outline-width", "5%" )
+			middleGutter.setAttribute("outline-color", "black" )
+			middleGutter.setAttribute("troika-text", {value: ":(will add commands here)"})
+			//middleGutter.setAttribute("troika-text", {textIndent: -.3})
+			middleGutter.className = "middlegutter"
+			codeEditor.element.appendChild( middleGutter )
+			middleGutter.object3D.position.y= -h/2-gutterHeight/2
+			// should disable the overlay first, see parseKeys
+				// see listeners in 'hud'
+			let enteringCommand = false
+			document.addEventListener('keydown', function(event) {
+				if (keyboardInputTarget != 'codeeditor') return
+				if (event.key == ":"){
+					enteringCommand = true
+					//let middlegutter = document.getElementById("middlegutter")
+					middleGutter.setAttribute("troika-text", {value: ":(started typing command)"})
+					// should add text here until esc or enter is pressed
+				} else if (enteringCommand) {
+					if (event.key == "Escape"){
+						enteringCommand = false
+						middleGutter.setAttribute("troika-text", {value: "(cancel, ready to receive new command)"})
+					} else if (event.key == "Enter"){
+						enteringCommand = false
+						middleGutter.setAttribute("troika-text", {value: "(executed, ready to receive new command)"})
+						// could rely only on searchAndReplaceInCodeEditor(before, after) for now
+							// which BTW should support a range, note the entire document (or window?)
+					} else {
+						middleGutter.setAttribute("troika-text", {value: 
+							middleGutter.getAttribute("troika-text").value
+							+ event.key})
+					}
+				}
+			});
+		})
+	})
+}
+
+function getNumberOfLinesFromCodeEditor(codeEditor){
+	let newLines = codeEditor.page.match(/\n/g)
+	if (!newLines) return 1 // undefined or 0
+	return newLines.length+1
+}
+
+function getEditorFromId( id ){
+	return editors.filter(e=>e.element.id.includes(id))?.[0]
+}
+
+// add jxr command on top of the editor e.g "jxr focusCodeEditor()" which would replace keyboard input
+	// switching keyboardInputTarget to 'codeeditor' then to 'hud' when done
+	// should also support clipboard or even a more direct way to have impact
+	// could save remotely (e.g wiki) or locally in localStorage
+function addCodeEditor(page="jxr console.log('hello world')", language="javascript",
+	position="-.5 1.6 -.7", name="codeditor", width=50, preventReflow=false ){
+	let codeEditor = {
+		element: null,
+		line: 0,
+		page: null,
+		startWindowRange: 0,
+		lengthWindowRange: 20,
+		scrollInterval: null,
+		currentlyDisplayedText: "",
+		caret: null,
+		language: ''
+	}
+	// could also add empty but with column and row for sizing
+
+	let forcedLines = ''
+	let pos = 0
+	let content = page
+	let line = ''
+	let parts =  page.split(' ')
+	let n = 0
+
+	if (!preventReflow && !language.length){
+		while ( pos < page.length ){
+			while ( line.length < width && parts[n]){
+				line += parts[n++] + ' '
+			}
+			let potentialine = content.slice(pos, pos+width)
+			forcedLines += line.trim() + '\n'
+			pos+=line.length
+			if (line.length==0) pos++
+			line = ''
+		}
+
+		codeEditor.page = forcedLines
+	} else {
+		codeEditor.page = page
+	}
+	codeEditor.line = codeEditor.startWindowRange
+	let numberOfLines = getNumberOfLinesFromCodeEditor(codeEditor)
+	if (numberOfLines<codeEditor.lengthWindowRange) codeEditor.lengthWindowRange = numberOfLines
+
+	content=codeEditor.page.split("\n").slice(codeEditor.line,codeEditor.line+codeEditor.lengthWindowRange).join("\n"); 
+	codeEditor.currentlyDisplayedText=content
+
+	if (document.getElementById(name)) name += Date.now()  
+	// shouldn't exist prior
+	if (!codeEditor.element) codeEditor.element = addNewNote(content, position, "0.1 0.1 0.1", name, "tool")
+	codeEditor.element.classList.add('reader')
+	codeEditor.element.setAttribute("troika-text", {value: content})
+	codeEditor.element.setAttribute("troika-text", {depthOffset: .1})
+	codeEditor.element.setAttribute("rotation", "30 0 0")
+	if (language.length && language != "none") {
+		codeEditor.element.setAttribute("troika-text", {colorRanges: highlight(content, language)})
+		codeEditor.language = language
+	}
+
+	addBackdropToTroikaElement( codeEditor)
+	addGuttersToTroikaElement( codeEditor)
+	
+	let scrollbarPicked = false
+	let previousPosition
+	let p = document.querySelector('[pinchprimary]')
+	let target = new THREE.Vector3(); // create once an reuse it
+	p.addEventListener('pinchended', pinchPrimaryScrollbarEnded );
+	function pinchPrimaryScrollbarEnded(event){
+		//p.removeEventListener('pinchended', pinchPrimaryScrollbarEnded)
+		//p.removeEventListener('pinchmoved', pinchPrimaryScrollbarMoved)
+		//p.removeEventListener('pinchstarted', pinchPrimaryScrollbarStarted)
+		if (!scrollbarPicked) return
+		scrollbarPicked = false
+	}
+	p.addEventListener('pinchmoved', pinchPrimaryScrollbarMoved );
+	function pinchPrimaryScrollbarMoved(event){
+		if (!scrollbarPicked) return
+		if (previousPosition.y>event.detail.position.y)
+			nextLineCodeEditor(1)
+		else
+			nextLineCodeEditor(-1)
+		previousPosition = event.detail.position.clone()
+	}
+	p.addEventListener('pinchstarted', pinchPrimaryScrollbarStarted );
+	function pinchPrimaryScrollbarStarted(event){
+		let rightGutterEl = codeEditor.element.querySelector(".rightgutter")
+		previousPosition = event.detail.position.clone()
+		rightGutterEl.object3D.getWorldPosition( target );
+		if (previousPosition.distanceTo(target)<0.1) scrollbarPicked = true
+	}
+	
+	editors.push( codeEditor )
+	return codeEditor
+}
+
+function addCodeMultipleEditors(parts, src, language, name='splitededitor'){
+	let editorParts = []
+	let pl = src.length/parts
+	for (let n=0; n<parts; n++ ){
+		editorParts.push( 
+			addCodeEditor( src.slice(n*pl,(n+1)*pl), language, '-0.22 '+(2-n/10)+' -.4', name+'_part'+n )
+		)
+	}
+	return editorParts
+}
+
+function mergeEditors( editors ){
+	// inherit language and content from the last found
+	let pos = ''
+	let content = ''
+	let language = ''
+	editors.reverse().map( e => {
+		content += e.page // could add separator, e.g new line
+		if (language != e.language) console.warn('different language in editors to merge')
+		language = e.language
+		pos = e.element.getAttribute("position").clone()
+		e.element.setAttribute("visible", false)
+	})
+	return addCodeEditor( content, language, AFRAME.utils.coordinates.stringify( pos ), "codeditormerge", editorBaseWidth, true )
+}
+
+// should reconsider the behavior as the content could still be the same but what is displayed changed
+function splitEditorHorizontally( codeEditor, preventReflow=true){
+	let p1, p2
+	if (codeEditor.language.length){
+		let content = codeEditor.page.split('\n')
+		p1 = content.slice(content.length/2).join('\n')
+		p2 = content.slice(0,content.length/2).join('\n')
+	} else {
+		p1 = codeEditor.page.slice(codeEditor.page.length/2)
+		p2 = codeEditor.page.slice(0,codeEditor.page.length/2)
+	}
+	let pos1 = codeEditor.element.getAttribute("position").clone()
+	let pos2 = codeEditor.element.getAttribute("position").clone()
+	//pos1.x-=1
+	//pos2.x+=1
+	pos1.y-=.1
+	pos2.y+=.1
+	// could also be set based on controllers/hands positions at the end of a stretch/pull gesture
+	let ce1 = addCodeEditor( p1, codeEditor.language, AFRAME.utils.coordinates.stringify( pos1 ), "codeditorsplit", editorBaseWidth, preventReflow)
+	let ce2 = addCodeEditor( p2, codeEditor.language, AFRAME.utils.coordinates.stringify( pos2 ), "codeditorsplit", editorBaseWidth, preventReflow )
+		//codeEditor.language, codeEditor.element.getAttribute("position"), "codeditorsplit" )
+	// should be smaller yet somehow displays it all
+	//updateCodeEditorWithContent(codeEditor, p2 )
+	return [ce1, ce2]
+}
+
+// could change model opacity based on hand position, fading out when within a (very small here) safe space
+
+function removeOutlineFromEntity( el ){
+	[...el.querySelectorAll(".outline_object")].map( i => i.remove() )
+}
+
+function getIdFromPick(){
+	let id = null
+	let pp = selectedElements.filter( e => e.primary )
+	if (pp && pp[pp.length-1] && pp[pp.length-1].element ){
+		if (!pp[pp.length-1].element.id) pp[pp.length-1].element.id= "missingid_"+Date.now() 
+		id = pp[pp.length-1].element.id
+		setFeedbackHUD(id)
+	}
+	return id
+}
+
+function getClassFromPick(){ // should be classes, for now assuming one
+	let classFound = null
+	let pp = selectedElements.filter( e => e.primary )
+	if (pp && pp[pp.length-1] && pp[pp.length-1].element ){
+		//if (!pp[pp.length-1].element.className) pp[pp.length-1].element.className= "missingclass"
+		// arguable
+		classFound = pp[pp.length-1].element.className
+		setFeedbackHUD(classFound)
+	}
+	return classFound
+}
+
+function getArrayFromClass(classname){
+	return Array.from( document.querySelectorAll("."+classname) )
+}
+
+function applyToClass(classname, callback, value){
+// example applyToClass("template_object", (e, val ) => e.setAttribute("scale", val), ".1 .1 .2")
+	getArrayFromClass(classname).map( e =>  callback(e, value))
+// could instead become a jxr shortcut, namely apply a set attribute to a class of entities
+}
+
+function changeColorLastClass(){
+	let classFound = getClassFromPick() // applies on primary only
+	if (classFound) 
+		[...document.querySelectorAll("."+classFound)].map( el => el.setAttribute("color", "red") )
+}
+
+function changeColorLastId(){
+	let id = getIdFromPick() // applies on primary only
+	if (id) document.querySelector("#"+id).setAttribute("color", "red")
+}
+
+function changeColorNextPinch(){
+	//let id = getIdFromPick() // applies on primary only
+		// does not work anymore ... but could listen to selectedElements changes via an observer but deprecated
+		// proxy could be nice but requires to modify push() calls first
+	let lastPrimary = selectedElements.filter( e => e.primary ).length
+
+	let checkForNewPinches = setInterval( _ => {
+		if (selectedElements.filter( e => e.primary ).length > lastPrimary){
+			let id = getIdFromPick() // applies on primary only
+			if (id) document.querySelector("#"+id).setAttribute("color", "red")
+			clearInterval(checkForNewPinches)
+		}
+	}, 50) // relatively cheap check, filtering on small array
+}
+
+// see demo ~30min in during https://www.youtube.com/watch?v=X9bQ-6oWKc4
+// should link to the right code already written
+	// see also cloneAndDistribute() & observe() but there is another one... between pinches
+		// observe being a shortcut to bindVariableValueToNewNote(variableName)
+let pointsFromMovement = []
+function nextMovementToPoints(debut=false){
+	pointsFromMovement = [] // could also add them to a larger array with timestamps
+	let el = document.querySelector('[pinchprimary]')
+	el.addEventListener('pinchended', function addThenRemove(event) { 
+		addPointToPointsFromMovement(event)
+		// could add a timeout so that if no pinchended happens after e.g 10sec one doesn't forget
+		el.removeEventListener('pinchended', addThenRemove)
+		el.removeEventListener('pinchstarted', addPointToPointsFromMovement)
+		el.removeEventListener('pinchmoved', addPointToPointsFromMovement)
+	});
+	el.addEventListener('pinchmoved', addPointToPointsFromMovement );
+	el.addEventListener('pinchstarted', addPointToPointsFromMovement );
+	function addPointToPointsFromMovement( event){
+		pointsFromMovement.push( event.detail.position.clone() )
+	}
+
+/*
+could be a promise also
+
+//see examples for debugging/dev 
+testPoints = await fetch("pointsFromMovementExample.json").then( r => r.json() )
+
+//could also otherwise down sample
+let first = new THREE.Vector3(  ).copy( testPoints[0] )
+let last = new THREE.Vector3(  ).copy( testPoints[testPoints.length-1]) 
+let distance = first.distanceTo( last )
+let direction = new THREE.Vector3().subVectors( last, first ).normalize()
+
+//example of adding on curve
+testPoints.map( p => addNewNote("something "+Math.random(), p) )
+
+//example of animating from start to end
+nn = addNewNote("something", testPoints[0]);
+nn.setAttribute("animation", {property: "position" , to: AFRAME.utils.coordinates.stringify(testPoints[testPoints.length-1]) } )
+*/
+}
+
+function addDropZone(position="0 1.4 -0.6", callback=setFeedbackHUD, radius=0.11){
+// consider how this behavior could be similar to the wrist watch shortcut
+// namely binding it to a jxr function
+	let el = document.createElement("a-sphere")
+	el.setAttribute("wireframe", true)
+	el.setAttribute("radius", radius)
+	el.setAttribute("position", position)
+	el.id = "dropzone_"+Date.now()
+	AFRAME.scenes[0].appendChild( el )
+	let sphere = new THREE.Sphere( AFRAME.utils.coordinates.parse( position ), radius )
+	// could become movable but would then need to move the matching sphere too
+		// could be a child of that entity
+	let pincher = document.querySelector('[pinchprimary]')
+	pincher.addEventListener('pinchended', function (event) { 
+		if (selectedElements.length){
+			let lastDrop = selectedElements[selectedElements.length-1]
+			if ((Date.now() - lastDrop.timestamp) < 1000){
+				if (sphere.containsPoint( lastDrop.element.getAttribute("position"))){
+					// should be a threejs sphere proper, not a mesh
+					console.log("called back" )
+					callback( lastDrop.selectedElement )
+				}
+			}
+		}
+	})
+	// never unregister
+	return el
+}
+
+/*
+
+generalize selector to pick last Nth rather than very last
+        adapt getIdFromPick() with .slice() after filter then map on length-N instead of length-1
+
+selector pickers : pickClass and pickId
+        display result in 3D HUD with rotating objects and selector value
+                ideally themselves also selectable/usable, e.g clone from HUD to bring back "out"
+                         requires extra work as becoming a child will not work, own positionning
+                                should fix that
+                        could compare to world coordinates instead of "just" position attribute
+        add a clear selector function to avoid making the HUD unusable
+
+could also pick via volume, e.g wireframe box
+        start with https://threejs.org/docs/#api/en/math/Box3.containsPoint
+                can iterate with https://threejs.org/docs/#api/en/math/Box3.containsBox
+                consider also https://threejs.org/docs/#api/en/math/Box3.intersectsBox
+
+consider pick then apply, i.e changeColorLastId() but for next Id
+        should be cancealable
+
+*/
+
+function addGrid(){ // not actually correct but does the job
+	plot = document.createElement("a-entity")
+	var idx = 0
+	for (var x=-5;x<=5;x++)
+		for (var y=0;y<=3;y++)
+			for (var z=-5;z<=5;z++){
+				xp=-x
+				yp=-y
+				zp=-z
+				plot.setAttribute("line__"+ ++idx, `start: ${x} ${y} ${z}; end : ${xp} ${y} ${z}; opacity: 1;`)
+				plot.setAttribute("line__"+ ++idx, `start: ${x} ${y} ${z}; end : ${x} ${yp} ${z}; opacity: 1;`)
+				plot.setAttribute("line__"+ ++idx, `start: ${x} ${y} ${z}; end : ${x} ${y} ${zp}; opacity: 1;`)
+			}
+	plot.id = "grid"
+	AFRAME.scenes[0].appendChild( plot )
+}
+
+// functions call by event listener should be within this scope
+// thus hopefully not conflicting with other listeners
+function emptyPinchToMove(){
+	const startRadius = .00001
+	const maxRadius = .1
+	const maxDist = .05
+	const resetPosition = "0 9999 0"
+	let previousPosition
+	let controlSphere = document.createElement("a-sphere")
+	let r = startRadius 
+	controlSphere.setAttribute("radius", r) 
+	controlSphere.setAttribute("color", "blue")
+	controlSphere.setAttribute("wireframe", "true")
+	controlSphere.setAttribute("position", resetPosition)
+	AFRAME.scenes[0].appendChild( controlSphere )
+	//targets.push(controlSphere) // keeping it out for specific control for now but should consider generalization
+        let el = document.querySelector('[pinchprimary]')
+        el.addEventListener('pinchended', function end(event) {
+		// el.removeEventListener('pinchended', end)
+		// el.removeEventListener('pinchstarted', pinched)
+		// el.removeEventListener('pinchmoved', moved)
+		r = startRadius
+		controlSphere.setAttribute("radius", r) 
+		controlSphere.setAttribute("position", resetPosition)
+        })
+        el.addEventListener('pinchmoved', moved );
+        function moved(event){
+		if (selectedElement) return
+		controlSphere.setAttribute("position", AFRAME.utils.coordinates.stringify( event.detail.position) )
+		if (r >= maxDist){
+			// start be movable after .05 diam
+			if (previousPosition){
+				diff = previousPosition.sub(event.detail.position).clone()
+				pushBackClass("hidableenvironment", diff.z*10) // consider something exponential instead while maintaining sign
+				pushLeftClass("hidableenvironment", diff.x*10)
+				// could rely on getArrayFromClass(classname) to then move on these 2 dimensions
+			}
+		} 
+		if (r < maxRadius) {
+			r += 0.01
+			controlSphere.setAttribute("radius", r) 
+		}
+		previousPosition = event.detail.position.clone()
+        }
+        el.addEventListener('pinchstarted', pinched );
+        function pinched(event){
+        }
+
+	let previousPositionSecondary
+        let elSecondary = document.querySelector('[pinchsecondary]')
+        elSecondary.addEventListener('pinchmoved', movedSecondary );
+        function movedSecondary(event){
+		if (selectedElement) return
+		if (previousPositionSecondary){
+			angle = previousPositionSecondary.sub(event.detail.position).clone()
+			let axis = new THREE.Vector3( 0, 1, 0 );
+			applyToClass("hidableenvironment", (e, val ) => {
+				//let rot = e.getAttribute("rotation")
+				//e.setAttribute("rotation", ""+rot.x+" "+(rot.y+val*90)+" "+rot.z)
+				// rotating from the center of the model, not the player position
+let obj = e.object3D
+obj.position.sub(val.point)
+obj.position.applyAxisAngle( axis, val.angle ) // no offset but reset when pinching again
+//obj.position.applyAxisAngle( axis, obj.rotation.y+val.angle ) // rotates with offset
+obj.position.add(val.point)
+obj.rotateOnAxis(axis, val.angle)
+// cf https://stackoverflow.com/questions/42812861/three-js-pivot-point/42866733#42866733
+// does reset on each new pinch though
+
+// might be a threejs vs AFrame rotation setup?
+			}, {angle:angle.x, point:event.detail.position.clone()})
+		}
+		previousPositionSecondary = event.detail.position.clone()
+        }
+}
+
+AFRAME.registerComponent('refresh-text-content-from-wiki-page', {
+	schema: {
+		pagename: {type: 'string', default: 'FoT'},
+	},
+	init:function(){
+		this.added = []
+		let = forcedPagename = AFRAME.utils.getUrlParameter('roomname')
+		forcedPagename?this.pagename=forcedPagename:this.pagename=this.data.pagename
+		this.tick = AFRAME.utils.throttleTick(this.tick, 500, this);
+	},
+	tick: function(){
+		let generatorName = this.attrName
+		fetch("https://fabien.benetou.fr/PIMVRdata/"+ this.pagename +"?action=source#" + Date.now()).then(res => res.text() ).then(res => {
+			res.split("\n").slice(0,maxItemsFromSources).map( (n,i) => {
+				found = this.added.find((str) => str === n)
+				if (typeof found === 'undefined'){
+					this.added.push(n)
+					addNewNote( n, "-1 "+(1+i/10)+" -2.5", ".1 .1 .1", null, generatorName ) 
+				}
+			})
+		})
+	}
+});
+
+function sendPerspectiveToServer(){
+	let pagename
+	let = forcedPagename = AFRAME.utils.getUrlParameter('roomname')
+	forcedPagename?pagename=forcedPagename:pagename="TestingPairCollaboration"
+	document.querySelector('a-scene').components.screenshot.getCanvas('perspective').toBlob( blob => { 
+	  let img = new File([blob], pagename+".jpg", { type: "image/jpeg"});
+
+	  form = new FormData();
+	  form.append('authpw', 'upload_pass_for_api');
+	  form.append('n', 'PIMVRdata.TestFormUpoad');
+	  form.append('action', 'postupload');
+	  form.append('uploadfile', img);
+
+	  fetch('https://fabien.benetou.fr/PIMVRdata/TestFormUpoad', {
+	    method: 'POST',
+	    body: form
+	  });
+	}, "image/jpeg", 0.8);
+}
+
+function doublePinchToScale(){
+	let initialPositionSecondary
+	let initialScale
+        let elSecondary = document.querySelector('[pinchsecondary]')
+        elSecondary.addEventListener('pinchmoved', movedSecondary );
+        function movedSecondary(event){
+		if (!selectedElement) return
+		let scale = initialScale * initialPositionSecondary.distanceTo(event.detail.position) * 50
+		selectedElement.setAttribute("scale", ""+scale+" "+scale+" "+scale+" ")
+        }
+        elSecondary.addEventListener('pinchstarted', startedSecondary );
+        function startedSecondary(event){
+		initialPositionSecondary = event.detail.position.clone()
+		if (!selectedElement) return
+		initialScale = AFRAME.utils.coordinates.parse( selectedElement.getAttribute("scale") ).x
+        }
+}
+
+function makeAnchorsVisibleOnTargets(){
+	targets.map( t => {
+		let controlSphere = document.createElement("a-sphere")
+		controlSphere.setAttribute("radius", 0.05) 
+		controlSphere.setAttribute("color", "blue")
+		controlSphere.setAttribute("wireframe", "true")
+		controlSphere.setAttribute("segments-width", 8)
+		controlSphere.setAttribute("segments-height", 8)
+		t.appendChild( controlSphere )
+	}) // could provide a proxy to be able to monitor efficiently
+}
+
+function startMesher(){
+// consider preview triangle from primary moved
+	let meshPoints = []
+	let meshTriangles = []
+	let offset
+	let meshEl = document.createElement("a-entity")
+	meshEl.className += "meshed"
+	AFRAME.scenes[0].appendChild( meshEl )
+
+        let elSecondary = document.querySelector('[pinchsecondary]')
+        elSecondary.addEventListener('pinchended', endedSecondary );
+	function endedSecondary(){
+		targets.push(meshEl)
+		meshEl.setAttribute('dynamic-body', "shape:hull")
+		// using 'dynamic-unless-picked' crashes the browser
+		//makeAnchorsVisibleOnTargets() // too large here
+		applyToClass("meshvertex", (e, val ) => e.setAttribute("visible", val), "false")
+		el.removeEventListener('pinchended', end)
+		elSecondary.removeEventListener('pinchended', endedSecondary );
+	}
+
+        let el = document.querySelector('[pinchprimary]')
+        el.addEventListener('pinchended', end)
+
+	function end(event) {
+		if (selectedElement) return
+		let pos = event.detail.position.clone()
+		if (meshPoints.length==0){
+			meshOffset = event.detail.position.clone()
+			meshEl.getAttribute("position").add(meshOffset)
+		}
+		let currentPos = AFRAME.utils.coordinates.stringify( pos.sub(meshOffset) )
+		let controlSphere = document.createElement("a-sphere")
+		controlSphere.className += "meshvertex"
+		controlSphere.setAttribute("radius", 0.01) 
+		controlSphere.setAttribute("color", "green")
+		controlSphere.setAttribute("wireframe", "true")
+		controlSphere.setAttribute("segments-width", 8)
+		controlSphere.setAttribute("segments-height", 8)
+		controlSphere.setAttribute("position", currentPos)
+		meshEl.appendChild( controlSphere )
+		meshPoints.push(controlSphere)
+		if (meshPoints.length==2){
+			let previousPos = AFRAME.utils.coordinates.stringify( 
+				meshPoints[meshPoints.length-2].getAttribute("position") )
+			meshEl.setAttribute("line", `start: ${previousPos}; end : ${currentPos}; opacity: 1; color:white;`)
+		}
+		if (meshPoints.length>2){
+			meshEl.removeAttribute("line")
+			let ranked = meshPoints
+				.slice(0,-1)
+				.map( t => { return { el: t, dist : pos.distanceTo(t.getAttribute("position") ) } })
+				.sort( (a,b) => a.dist - b.dist)
+			let triangle = document.createElement("a-triangle")
+			triangle.setAttribute("vertex-a", currentPos)
+			triangle.setAttribute("vertex-b", 
+				AFRAME.utils.coordinates.stringify( ranked[0].el.getAttribute("position") ))
+			triangle.setAttribute("vertex-c", 
+				AFRAME.utils.coordinates.stringify( ranked[1].el.getAttribute("position") ))
+			triangle.setAttribute("material", "side:double")
+			meshEl.appendChild( triangle )
+			meshTriangles.push( triangle )
+		}
+        }
+}
+
+AFRAME.registerComponent('dynamic-unless-picked', {
+	init: function(){
+		let el = this.el
+		el.setAttribute('dynamic-body', "")
+		this.el.addEventListener('picked', function (event) {
+			el.removeAttribute('dynamic-body')
+			el.setAttribute('static-body', "")
+		})
+		this.el.addEventListener('released', function (event) {
+			el.removeAttribute('static-body')
+			el.setAttribute('dynamic-body', "")
+		})
+	}
+	// should unregister on remove
+})
+
+AFRAME.registerComponent('collider-check', {
+  dependencies: ['raycaster'],
+
+  init: function () {
+    let worldPosition=new THREE.Vector3();
+    let v3 = new THREE.Vector3
+    let comeCloserInterval
+    this.el.addEventListener('raycaster-intersection', function (e) {
+      console.log('intersected')
+      comeCloserInterval = setInterval( _=> {
+	document.getElementById("leftHand").object3D.traverse( e => { if (e.name == "wrist") {
+		worldPosition.copy(e.position);e.parent.updateMatrixWorld();e.parent.localToWorld(worldPosition)
+	} })
+	e.detail.intersections[0]?.object.el.object3D.position.lerp(worldPosition, 0.1)
+	}, 100)
+    });
+    this.el.addEventListener('raycaster-intersection-cleared', function (e) {
+      console.log('cleared')
+      clearInterval( comeCloserInterval )
+    });
+  }
+});
+
+// should generalize to selector, like pushDownClass and related
+function tiltUpId(id){ tiltId(id, 0.1) }
+function tiltDownId(id){ tiltId(id, -0.1) }
+function tiltId(id, value){
+	document.getElementById(id).object3D.position.y+=value;
+	document.getElementById(id).object3D.rotation.x+=value; 
+}
+
+function onNextPinchSplitReader(){
+	//let id = getIdFromPick() // applies on primary only
+		// does not work anymore ... but could listen to selectedElements changes via an observer but deprecated
+		// proxy could be nice but requires to modify push() calls first
+	let lastPrimary = selectedElements.filter( e => e.primary ).length
+
+	let checkForNewPinches = setInterval( _ => {
+		if (selectedElements.filter( e => e.primary ).length > lastPrimary){
+			let id = getIdFromPick() // applies on primary only
+			if (id) {
+				let srcEditor = getEditorFromId( id )
+				let editorParts = splitEditorHorizontally( srcEditor )
+				// could position based on hands positions
+				// should hide or even delete older one
+				srcEditor.element.setAttribute('visible', false)
+				// could display a line between current pinch and secondary hand
+					// or temporary transparency on the 2 new editors
+					// could attach on hand indexes
+			}
+			clearInterval(checkForNewPinches)
+		}
+	}, 50) // relatively cheap check, filtering on small array
+}
+
+function addConnectorsToCodeEditor( codeEditor, input=true, output=true){
+	let el = codeEditor.element
+	el.addEventListener("object3dset", e => {
+		el.object3D.children[0].addEventListener("synccomplete", e => {
+			b = el.object3D.children[0]._textRenderInfo.blockBounds
+			w = b[2]-b[0]
+			h = b[3]-b[1]
+			// this assumes an axis aligned entity, which is correct until now
+			if (input){
+				el.setAttribute("line__input", `start: 0 0 0; end : -1 1 0; opacity: 1;`)
+				el.setAttribute("line__input__end", `start: -1 1 0; end : -2 1 0; opacity: 1;`)
+				// order matters for getConnectorsFromEditor, the very tip MUST be the end point
+			}
+			if (output){
+				el.setAttribute("line__output", `start: ${w} ${-h} 0; end : ${w+1} ${-h-1} 0; opacity: 1;`)
+				el.setAttribute("line__output__end", `start: ${w+1} ${-h-1} 0; end : ${w+2} ${-h-1} 0; opacity: 1;`)
+				// order matters for getConnectorsFromEditor, the very tip MUST be the end point
+			}
+		})
+	})
+	return el
+}
+
+function connectionsBetweenEditors( a, b ){
+	const connectionThreshold = 1 // to adjust after tries in VR, should probably be much shorter
+	let ca = getConnectorsFromEditor( a )
+	let cb = getConnectorsFromEditor( b )
+	let links = []
+	if ( ca.input && cb.output && ca.input.distanceTo(cb.output) < connectionThreshold ){
+		links.push({source:a, target:b})
+	}
+	if ( cb.input && ca.output && cb.input.distanceTo(ca.output) < connectionThreshold ){
+		links.push({source:b, target:a})
+	}
+	return links
+}
+
+function getConnectorsFromEditor( codeEditor ){
+	const pos = new THREE.Vector3()
+	const scale = new THREE.Vector3()
+	const quaternion = new THREE.Quaternion()
+	codeEditor.element.object3D.getWorldPosition(pos)
+	codeEditor.element.object3D.getWorldScale(scale)
+	codeEditor.element.object3D.getWorldQuaternion(quaternion)
+	let connectors = {source: codeEditor}
+	let res = ['input', 'output'].map( ctype => { // we might get different types of inputs or outputs later
+		let i = codeEditor.element.getObject3D('line__'+ctype+'__end')
+		if (i){
+			let tip = new THREE.Vector3( ...i.geometry.attributes.position.array.slice(3)) // end point
+			tip.applyQuaternion( quaternion )
+			tip.multiply(scale)
+			tip.add(pos)
+			connectors[ctype] = tip
+			//visualDebugSphere(tip)
+		}
+	})
+	return connectors
+}
+
+function generateGraphFromEditors( editors ){
+	let inputs = editors.map( e => getConnectorsFromEditor(e) ).filter( c => c.input )
+	let outputs = editors.map( e => getConnectorsFromEditor(e) ).filter( c => c.output )
+	let connections = []
+	// check distances between all inputs with outputs which are not from the same source
+	outputs.map( o => {
+		inputs.map( i => {
+			if (i.source != o.source && i.input.distanceTo( o.output ) < .2 )
+				connections.push( { source: o.source, target: i.source })
+		})
+	})
+	let graph = {}
+	editors.map( (e) => {
+		graph[e.element.id] = {}
+		let g = graph[e.element.id] 
+		g.editor = e
+		g.predecessors = []
+		g.successors = []
+		connections.map( c => {
+			if (c.target == e) g.predecessors.push(c.source)	
+			if (c.source == e) g.successors.push(c.target)	
+		})
+	})
+	return graph
+}
+
+function visualDebugSphere( pos ){
+	let controlSphere = document.createElement("a-sphere")
+	controlSphere.setAttribute("radius", 0.01) 
+	controlSphere.setAttribute("color", "blue")
+	controlSphere.setAttribute("wireframe", "true")
+	controlSphere.setAttribute("segments-width", 8)
+	controlSphere.setAttribute("segments-height", 8)
+	controlSphere.classList.add('visualdebug')
+	controlSphere.setAttribute("position", AFRAME.utils.coordinates.stringify( pos ) )
+	AFRAME.scenes[0].appendChild( controlSphere )
+	return controlSphere
+}
+
+function numberOfPredecessors( g ){ return Object.keys( g ).map( k => g[k].predecessors.length ) }
+
+function numberOfSuccessors( g ){ return Object.keys( g ).map( k => g[k].successors.length ) }
+
+function traverseFunctionGraph( g ){
+	let callStack = []
+	Object.keys( g ).map( k => {
+		if (!g[k].predecessors.length) callStack.push( g[k] )
+	} )
+	if (callStack.length < 1){
+		console.warn( 'no entry point found in editor graph' )
+		return []
+	}
+	if (callStack.length > 1){
+		console.warn( 'multiple entry point founds in editor graph' )
+		return []
+	}
+	let pos = 0
+	while ( callStack[pos].successors?.[0] ) {
+		callStack.push( g[ callStack[pos].successors[0].element.id ] )
+		pos++
+	}
+	return callStack
+}
+
+var points2D = []
+function startDraw2D(){
+// consider draw( pos ) too
+	let p = document.querySelector('[pinchprimary]')
+	let target = new THREE.Vector3(); // create once an reuse it
+	p.addEventListener('pinchended', pinchPrimaryDraw2DEnded );
+	let indexTipTracking
+	let controlSphere
+	function pinchPrimaryDraw2DEnded(event){
+		let pos = event.detail.position.clone()
+		let controlSphere = points2D[points2D.length-1]
+		// check if close enough to starting point, if yes then remove listeners
+		/*
+		if ( pos.distanceTo( controlSphere.getAttribute("position") ) < .1 ){
+			console.log('removed listeners')
+			p.removeEventListener('pinchended', pinchPrimaryDraw2DEnded)
+			p.removeEventListener('pinchmoved', pinchPrimaryDraw2DMoved)
+			p.removeEventListener('pinchstarted', pinchPrimaryDraw2DStarted)
+		}
+		*/
+		//clearInterval( indexTipTracking )
+
+	}
+	p.addEventListener('pinchmoved', pinchPrimaryDraw2DMoved );
+	function pinchPrimaryDraw2DMoved(event){
+		// update line ending point position
+		let pos = event.detail.position.clone()
+		//let controlSphere = points2D[points2D.length-1]
+	}
+	p.addEventListener('pinchstarted', pinchPrimaryDraw2DStarted );
+	function pinchPrimaryDraw2DStarted(event){
+		// creates an offset between last pinch and last index tip position
+			// could merge them by updating the previous line end to the current pinch position
+			// could add a new line between both
+		if (points2D.length && points2D.length > 0){
+			let lastPoint = points2D[points2D.length-1]
+			let previouspos = 
+				lastPoint.getAttribute("line__0").end.clone().add( lastPoint.getAttribute('position') )
+		}
+		controlSphere = document.createElement("a-sphere")
+		points2D.push( controlSphere )
+		let pos = event.detail.position.clone()
+		controlSphere.className += "draw2d"
+		controlSphere.setAttribute("radius", 0.005)
+		controlSphere.setAttribute("color", "purple")
+		controlSphere.setAttribute("wireframe", "true")
+		controlSphere.setAttribute("segments-width", 8)
+		controlSphere.setAttribute("segments-height", 8)
+		controlSphere.setAttribute("position", pos)
+		AFRAME.scenes[0].appendChild( controlSphere )
+		controlSphere.setAttribute("line__0", `start: 0 0 0; end : 0 0 0; opacity: 1; color:purple;`)
+		clearInterval( indexTipTracking )
+		indexTipTracking = setInterval( _ => {
+			target = p.components['hand-tracking-controls'].indexTipPosition
+			// sometimes getting strange values, might check against null/0
+			let line = controlSphere.getAttribute("line__0")
+			let cspos = controlSphere.getAttribute("position")
+			if (line){
+				let previousPos = AFRAME.utils.coordinates.stringify( target.sub(cspos) )
+				//pos.z = line.start.z // stick to a single plane, here axis aligned
+				controlSphere.setAttribute("line__0", "end", previousPos)
+			}
+		}, 20)
+	}
+}
+
+function colorGradient(fadeFraction, rgbColor1, rgbColor2, rgbColor3) {
+// https://gist.github.com/gskema/2f56dc2e087894ffc756c11e6de1b5ed
+    var color1 = rgbColor1;
+    var color2 = rgbColor2;
+    var fade = fadeFraction;
+
+    // Do we have 3 colors for the gradient? Need to adjust the params.
+    if (rgbColor3) {
+      fade = fade * 2;
+
+      // Find which interval to use and adjust the fade percentage
+      if (fade >= 1) {
+        fade -= 1;
+        color1 = rgbColor2;
+        color2 = rgbColor3;
+      }
+    }
+
+    var diffRed = color2.red - color1.red;
+    var diffGreen = color2.green - color1.green;
+    var diffBlue = color2.blue - color1.blue;
+
+    var gradient = {
+      red: parseInt(Math.floor(color1.red + (diffRed * fade)), 10),
+      green: parseInt(Math.floor(color1.green + (diffGreen * fade)), 10),
+      blue: parseInt(Math.floor(color1.blue + (diffBlue * fade)), 10),
+    };
+
+    return 'rgb(' + Math.max(0,gradient.red) + ',' + Math.max(0,gradient.green) + ',' + Math.max(0,gradient.blue) + ')';
+}
+
+function presetColorGradient(fadeFraction){
+  let highColor = { red: 217, green: 83, blue: 79 };
+  let mediumColor = { red: 240, green: 173, blue: 78 };
+  let lowColor = { red: 92, green: 184, blue: 91 };
+
+  return colorGradient(fadeFraction, lowColor, mediumColor, highColor);
+}
+
+function tensionVisualized(){
+	let p = document.querySelector('[pinchprimary]')
+	let ptarget = new THREE.Vector3(); // create once an reuse it
+	let s = document.querySelector('[pinchsecondary]')
+	let starget = new THREE.Vector3(); // create once an reuse it
+	let entity = document.createElement("a-entity")
+	AFRAME.scenes[0].appendChild( entity )
+	entity.setAttribute("line__0", `start: 0 0 0; end : 0 0 0; opacity: 1; color:purple;`)
+	let indexesTipTracking = setInterval( _ => {
+		ptarget = p.components['hand-tracking-controls'].indexTipPosition
+		starget = s.components['hand-tracking-controls'].indexTipPosition
+		// sometimes getting strange values, might check against null/0
+		let line = entity.getAttribute("line__0")
+		if (line){
+			let start = AFRAME.utils.coordinates.stringify( ptarget )
+			entity.setAttribute("line__0", "start", start)
+			let end = AFRAME.utils.coordinates.stringify( starget )
+			entity.setAttribute("line__0", "end", end)
+			entity.setAttribute("line__0", "color", presetColorGradient( ptarget.distanceTo(starget)) )
+		}
+	}, 20)
+}
+
+function ontouch(){
+	let p = document.querySelector('[pinchprimary]')
+	let ptarget = new THREE.Vector3(); // create once an reuse it
+	let indexesTipTracking = setInterval( _ => {
+		ptarget = p.components['hand-tracking-controls'].indexTipPosition
+		getClosestTargetElement( ptarget )?.setAttribute('wireframe', true)
+	}, 20)
+}
+
+function thumbToIndexPull(){
+	let p = document.querySelector('[pinchprimary]')
+	let tip = new THREE.Vector3(); // create once an reuse it
+	let proximal = new THREE.Vector3(); // create once an reuse it
+	let thumb = new THREE.Vector3(); // create once an reuse it
+	let touches = []
+	const threshold_thumb2tip = 0.01
+	const threshold_thumb2proximal = 0.05
+	let indexesTipTracking = setInterval( _ => {
+		// cpnsider getObjectByName() instead
+		p.object3D.traverse( e => { if (e.name == 'index-finger-tip' ) tip = e.position })
+		//index-finger-phalanx-distal 
+		//index-finger-phalanx-intermediate
+		p.object3D.traverse( e => { if (e.name == 'index-finger-phalanx-proximal' ) proximal = e.position })
+		p.object3D.traverse( e => { if (e.name == 'thumb-tip' ) thumb = e.position })
+		let touch = {}
+		touch.date = Date.now()
+		touch.thumb2tip = thumb.distanceTo(tip)
+		if (!touch.thumb2tip) return
+		touch.thumb2proximal = thumb.distanceTo(proximal)
+		//console.log( touch.thumb2tip, touch.thumb2proximal )
+		// usually <1cm				<4cm (!)
+		//if ((touch.thumb2tip && touch.thumb2tip < threshold_thumb2tip)
+			//|| (touch.thumb2proximal && touch.thumb2proximal < threshold_thumb2proximal))
+		if (touch.thumb2tip < threshold_thumb2tip
+			|| touch.thumb2proximal < threshold_thumb2proximal){
+			if (touches.length){
+				let previous = touches[touches.length-1]
+				if (touch.date - previous.date < 300){
+					if (touch.thumb2tip < threshold_thumb2tip &&
+						previous.thumb2proximal < threshold_thumb2proximal){
+						console.log('^')
+						p.emit('thumb2indexpull')
+					}
+					if (touch.thumb2proximal < threshold_thumb2proximal &&
+						previous.thumb2tip < threshold_thumb2tip){
+						console.log('v')
+						p.emit('thumb2indexpush')
+					}
+				}
+			}
+			touches.push(touch)
+		}
+	}, 50)
+	// TODO
+	// Bind thumb2indexpush/thumb2indexpull to zoom in/out "world" i.e all assets that aren't "special" e.g self, lights, UI
+}
+
+function thumbToIndexAngle(){
+	let p = document.querySelector('[pinchprimary]')
+	let tip = new THREE.Vector3(); // create once an reuse it
+	let metacarpal = new THREE.Vector3(); // create once an reuse it
+	let thumb = new THREE.Vector3(); // create once an reuse it
+	let indexesTipTracking = setInterval( _ => {
+		p.object3D.traverse( e => { if (e.name == 'index-finger-tip' ) tip = e.position })
+		p.object3D.traverse( e => { if (e.name == 'thumb-metacarpal' ) metacarpal = e.position })
+		p.object3D.traverse( e => { if (e.name == 'thumb-tip' ) thumb = e.position })
+		tip.sub(metacarpal)
+		thumb.sub(metacarpal)
+		let angle = thumb.angleTo(tip)
+		if (angle > 0.9 && angle < 1.2) {
+			console.log( 'r' )
+			p.emit('thumb2indexpush')
+			// could insert (with max threshold) a targe entity between tip and thumb
+				// this entity could then ondrop add a new post it note or jxr element
+		}
+		// could also check angle against head to insure it's facing the user
+	}, 590)
+}
+
+// used for testing
+AFRAME.registerComponent('startfunctions', {
+  init: function () {
+
+	thumbToIndexAngle()
+	//thumbToIndexPull()
+	//ontouch()
+	//tensionVisualized()
+	//startExperience()
+	//doublePinchToScale()
+	//emptyPinchToMove()
+	//makeAnchorsVisibleOnTargets()
+	//startMesher()
+  }
+})