WebGPU lightmapper support for shadow casting local lights and omni shadow shader cleanup

[mvaligursky]

Summary

Enables lightmapper to work correctly on WebGPU with shadow casting omni/spot lights and cleans up shadow shader handling for omni lights by properly separating shadow coordinate calculation based on light type.

Changes

Lightmapper WebGPU Support

• Unified WebGL and WebGPU rendering paths to both use render passes, and this adds support for local lights on WebGPU
• Non-clustered shadow rendering now uses RenderPassShadowLocalNonClustered instead of deprecated shadowRenderer.render()

Dead Code Removal

renderer.js

• Removed setCamera() and clearView() methods (only used by old lightmapper path)

shadow-renderer.js

• Removed render() method (replaced by render passes)
• Removed insideRenderPass parameter from renderFace() - now always assumes inside render pass

Shader Cleanup - Omni Shadow Matrix

Omni lights use cubemap shadows that sample by direction, not matrix transformation. The shadowMatrix uniform was incorrectly handled.

lightFunctionShadow.js (GLSL & WGSL)

• Added getShadowSampleCoordOmni{i}() - dedicated function for omni lights without shadowMatrix parameter
• getShadowSampleCoord{i}() now only handles directional/spot lights
• getShadow{i}() dispatches to appropriate function based on light type

lightDeclaration.js (GLSL & WGSL)

• Shadow section: Skip declaring shadowMatrix for omni lights (not used)
• Cookie section (GLSL only): Always declare shadowMatrix for omni cookies (needed for cube orientation)

Example Updates

lights-baked.example.mjs

• Update to be easily tell if something does not work, which was not possible with the original random positioning
• Added orbit camera with controls
• Added visual representations for lights (emissive sphere/cone/cylinder)
• Added UI controls for toggling lights and soft shadows
• Objects arranged in deterministic 8x8 grid

[willeastcott]

What're the additional spaces at the start of the label for?

[mvaligursky]

it was supposed to be indented .. as it applies to directional light only, but it didn't work :)

[willeastcott]

Can you use camera-controls.mjs (as I do in the new annotations example)?

[willeastcott]

Nice!