Paint on primitives #93

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utopiah · 2026-05-14T07:52:53Z

utopiah commented

2026-05-14 07:52:53 +00:00

Now that #29 and #30 are implemented, allowing to draw freely in 3D, it would be useful to use similar mechanics to paint on primitives (and potentially models).

It could stay with painting on <a-plane> then generalize to faces of other primitives then models.

It's useful for annotations but also follow how powerful creating own assets is with OctoStudio. There are seeding assets but very quickly using the camera a lot is added with the World around the player.

Now that #29 and #30 are implemented, allowing to draw freely in 3D, it would be useful to use similar mechanics to paint on primitives (and potentially models). It could stay with painting on `<a-plane>` then generalize to faces of other primitives then models. It's useful for annotations but also follow how powerful creating own assets is with OctoStudio. There are seeding assets but very quickly using the camera a lot is added with the World around the player.

utopiah added the Beyond NLNet2025-04 label 2026-05-14 07:53:01 +00:00

utopiah commented

2026-05-14 07:54:52 +00:00

Well known toys like Spirograph https://en.wikipedia.org/wiki/Spirograph or basic 2D drawing (e.g. using SVG in https://home.benetou.fr/spirale.html or more generally canvas) can be use to teach geometrical concepts. This in turn can be used here.

utopiah commented

2026-05-14 07:55:04 +00:00

See also #88

utopiah added the Remixing label 2026-05-29 12:25:28 +00:00

utopiah commented

2026-05-29 12:57:50 +00:00

See also past work on drawing on canvas https://git.benetou.fr/utopiah/spasca-fot-sloan-q4/src/branch/main/data/index.html#L1162-L1211

utopiah removed the Beyond NLNet2025-04 label 2026-05-29 13:34:36 +00:00

utopiah commented

2026-05-29 14:50:27 +00:00

Can be used for #84

utopiah commented

2026-06-17 19:24:19 +00:00

Consider

elForCanvas.setAttribute("src", graphicscanvas.toDataURL() ) 
let m = elForCanvas.getObject3D('mesh').material
if (m.map) m.map.needsUpdate = true // does not work in VR
// optionally

Consider ``` elForCanvas.setAttribute("src", graphicscanvas.toDataURL() ) let m = elForCanvas.getObject3D('mesh').material if (m.map) m.map.needsUpdate = true // does not work in VR // optionally ```

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Reference: utopiah/biggu_s_gate#93