NodeMaterial: Basic BSDFs of MeshStandardMaterial and NodeBuilder simplification

[sunag]

• Basic BSDFs MeshStandardMaterial -> roughnessNode, metalnessNode, normalNode
• Simplification of NodeBuilder code generator and depedencies (biggest update of this PR)
• NormalMap Support
• 30+ math functions to MathNode
• ColorSpaceNode all three.js encoding functions (automatic use in TextureNode)
• Temporary variable system: TempNode
• StructNode Support
• New LightContext ( more generic )
• ExpressionNode for inline code

WebGPU - Selective Lights
https://raw.githack.com/sunag/three.js/dev-nodematerial-igalia-1/examples/webgpu_lights_selective.html

// PhysicalLightingModel example
// ReflectedLight use the same standard native of threejs

const glslCode = 
`void ( inout ReflectedLight reflectedLight, vec3 lightDirection, vec3 lightColor ) {

	RE_Direct_Physical( reflectedLight, lightDirection, lightColor );

}`

const physicalLightingModel = new FunctionNode(  glslCode   ).setIncludes( [ RE_Direct_Physical ] );

[sunag]

Sorry the big code!! The nexts PR will be smaller packages.

One question, I can remove Phong Material support to WebGPU in order to simplify?
This can be added by the user using Custom lighting model.

[Mugen87]

One question, I can remove Phong Material support to WebGPU in order to simplify?

I would say yes.

[mrdoob]

Yay!

[mrdoob]

Hmm, I think there is something wrong with the normal map code though:

Screen.Recording.2021-08-24.at.11.14.13.AM.mov

[sunag]

Hmm, I think there is something wrong with the normal map code though:

Well noticied, fixed :)

[Mugen87]

It seems type is not used in this method.

[Mugen87]

Another unused variable.

[Mugen87]

And here, too.

[mrdoob]

Merging this. I think we can leave the unused vars clean up for another PR.

[mrdoob]

Thanks! Welcome back! 🤗

[sunag]

@mrdoob Thank you again!!! I am very happy to have returned. 🎉