WebGPU and NodeMaterial: WGSL Support

[sunag]

Description

I did an approach entirely using flows for NodeBuilder for that we can remove ShaderLib approach and build material without a GLSL scheme in ES6 with a similar GLSL syntax.

We removed support for GLSL and glslang.js dependencies which had a reduction of 922 KB, including greater performance in shader compilation.

The port of GLSL for WebGPU is too experimental and caused numerous bugs only in my last implementations, unlike of WGSL that is the native shading language of WebGPU and is a bit more low-level allowing more control and optimization for Shader Graphs like NodeMaterial. A happy ending at last, in fact a new start :)

Yet, much work in flow process can be done in NodeMaterial but I think that we first can mature the integration and provide more natives features supported of Three.js for WebGPU like we did in: SkinningNode, and adding basic support for analytic lights and PBR using ShaderNode ( #22662 )

Link

https://raw.githack.com/sunag/three.js/dev-wgsl/examples/index.html?q=webgpu

Related issue

ShaderNode - #22603

This contribution is funded by Google via Igalia.

[mrdoob]

Thanks!