WebGPURenderer: support clipping

[aardgoose]

Supports global and material bases clipping.

Notes:

This can be extended to support a ClippingGroup() as mentioned at:

three.js/src/renderers/WebGLRenderer.js

Lines 1783 to 1786 in a2bf250

	// we might want to call this function with some ClippingGroup
	// object instead of the material, once it becomes feasible
	// (#8465, #8379)
	clipping.setState( material, camera, useCache );

Fixes shadow handling of shadow side.

Added support for uniform arrays for vec4 only. Is this method ok or is a full set of ArrayUniform and ArrayNodeUniform classes prefered?

[LeviPesin]

Added support for uniform arrays for vec4 only. Is this method ok or is a full set of ArrayUniform and ArrayNodeUniform classes prefered?

I guess we should support arbitrary types.

[aardgoose]

Added support for uniform arrays for vec4 only. Is this method ok or is a full set of ArrayUniform and ArrayNodeUniform classes prefered?

I guess we should support arbitrary types.

I was wondering what method to use as opposed to which types. This approach just detects an array 'value' in the Uniform code and UniformGroups then handles arrays as part of the existing path. Or should NodeBuilder allocate a 'Vec{n}ArrayNodeUniform' etc which requires more boilerplate classes. There is an ArrayUniformNode too, but that doesn't appear to be used anywhere yet, and this works with a standard uniform() node.

[sunag]

There is an ArrayUniformNode too, but that doesn't appear to be used anywhere yet, and this works with a standard uniform() node.

ArrayUniformNode was initially implemented here ( #22497 ) but there is no related example anymore. I was also implementing array logic for floats, we will certainly help each other with that.

[sunag]

Maybe we need to add webgpu_clipping example in puppeteer too?

[aardgoose]

This now uses uniforms().

I'm not sure what is going on with the screen shot failure. The major area of difference is the bottom edge which isn't subject to clipping.

[aardgoose]

We commented at the same time.
I'll exclude it from the tests.