AnimSkin can now write CPU-skinning results back to the render mesh so skeletal animation actually plays from scripts:
- capture bind normals at fromModel and skin them per pose (updateSkinnedNormals / getSkinnedNormals, cofactor inverse-transpose + normalize)
- packed getSkinnedPositions() array getter, matching AnimLattice's script pattern
- one-call applyToMesh(gfx, mesh, pose): skin positions+normals then in-place gpu.updateMeshVertices
- Renderable3D.getMesh() script binding so createRenderable meshes are reachable
- Mesh::gpuVertexCount so getVertexCount() is correct for non-morph meshes (both backends)
- tests: packed positions == skinPositionsTo, normals follow pose and stay unit length, applyToMesh render test with in-place updates
- docs: animation/graphics user guides + design spec
西风逍遥游
c65daede2e