document interactions beyond pinches #94

e.g action on release :

elements.map( el => { el.addEventListener('released', e => console.log('do sth') ) } )
// could also be moved or picked events

from 3edd5c6117

or using both index finger tips :

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 indexesTipTracking = setInterval( _ => {
	ptarget = p.components['hand-tracking-controls'].indexTipPosition
	starget = s.components['hand-tracking-controls'].indexTipPosition
	console.log( ptarget.distanceTo(starget) )
}, 20)

from c8b3cb5741

e.g ondrop from 51fc1d860f (should probably de onreleased to be coherent with the current event)