Morphing uses texture array to store morph targets

[mvaligursky]

• fixes Use TextureArray to store MorphTargets #7555
• additionally fixes the handling of texture arrays in WGSL

[Copilot]

Pull Request Overview

This PR refactors the morph target system to use texture arrays for storing morph targets and updates WGSL support accordingly. Key changes include the removal of legacy per-target texture declarations/evaluations, updating shader code (both GLSL and WGSL) to loop over texture arrays, and refactoring the Morph and MorphInstance classes to better handle texture array creation and blending.

Reviewed Changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/scene/shader-lib/chunks/internal/morph/frag/morphEvaluation.js	Removed legacy morph evaluation code.
src/scene/shader-lib/chunks/internal/morph/frag/morphDeclaration.js	Removed legacy morph declaration code.
src/scene/shader-lib/chunks/internal/morph/frag/morph.js	Reworked shader to use a texture array and an explicit loop for morphing.
src/scene/shader-lib/chunks/chunks.js	Removed references to legacy morph shader chunks.
src/scene/shader-lib/chunks-wgsl/internal/morph/frag/morph*.js	Updated WGSL shaders to support texture arrays in morphing.
src/scene/shader-lib/chunks-wgsl/chunks-wgsl.js	Removed references to deprecated WGSL morph includes.
src/scene/morph.js	Refactored texture data creation, updated error handling, and memory cleanup.
src/scene/morph-target.js	Updated destroy method and removed obsolete accessors.
src/scene/morph-instance.js	Reworked shader creation and texture blending logic for morphing.
src/platform/graphics/webgpu/webgpu-shader-processor-wgsl.js	Simplified texture resource parsing using updated mapping.

Comments suppressed due to low confidence (2)

src/scene/morph.js:191

• The function changes its behavior by returning undefined instead of false on error. Review and update the return type and error-handling flow to maintain consistency with callers.

if (morphTextureHeight > maxTextureSize) { Debug.warnOnce(`Morph target data is too large ...`); return; }

src/scene/morph-instance.js:217

• It appears that the constant 'BlendState' is used without an explicit import. Ensure that 'BlendState' is imported to avoid runtime errors.

device.setBlendState(BlendState.NOBLEND);