first pass at occlusion in gpurenderer

[cabanier]

This implements per pixel occlusion by updating the shader of each renderer object.

@sunag , even though I apply the masknode to each element in the scene, it seems to apply only to some of the elements in the scene. If I recreate the material with masknode (instead of just assigning the node), it seems to work.

Am I doing something wrong?

[cabanier]

@mrdoob instead of copying the depth like we did previously, we now depth text for each render pixel.
I'm hoping to use the view/projection matrices in effect of the capture of the depth texture for better occlusion alignment. I have not figured out how to do that yet :-)

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	337.4 78.67	337.4 78.67	+0 B +0 B
WebGPU	553.64 153.44	555.1 153.85	+1.46 kB +411 B
WebGPU Nodes	552.99 153.28	554.45 153.69	+1.46 kB +411 B

🌳 Bundle size after tree-shaking

Minimal build including a renderer, camera, empty scene, and dependencies.

	Before	After	Diff
WebGL	468.59 113.32	468.59 113.32	+0 B +0 B
WebGPU	628.59 170.16	630.03 170.55	+1.44 kB +396 B
WebGPU Nodes	583.45 159.5	584.88 159.9	+1.44 kB +397 B

[cabanier]

@sunag @Mugen87 Any idea why applying the masknode to each material only works for some objects?

[sunag]

I'm working on a NodeHandler to handle this with this kind of replacement, I think renderer.applyOcclusion() should be replaced with something more targeted at replacement at render time.

[cabanier]

I'm working on a NodeHandler to handle this with this kind of replacement, I think renderer.applyOcclusion() should be replaced with something more targeted at replacement at render time.

How can I do that?

[sunag]

How can I do that?

I'm developing this new feature.

Have you tried replacing for testes your code renderer.xr.applyOcclusion() with?

scene.traverse( ( object ) => {

	if ( object.material ) {

		object.material.maskNode = false;

	}

} );

It seems to disappear(apply) all objects.

[cabanier]

Have you tried replacing for testes your code renderer.xr.applyOcclusion() with?

scene.traverse( ( object ) => {

	if ( object.material ) {

		object.material.maskNode = false;

	}

} );

It seems to disappear(apply) all objects.

Isn't that expected? Or are you saying that the current code disappears all objects?

[sunag]

Isn't that expected? Or are you saying that the current code disappears all objects?

Yes, works as expected, just answering the previous question about: masknode only works for some objects. The problem is probably related to something else.