node_modules/three/src/renderers/shaders/ShaderChunk/skinbase_vertex.glsl.js

export default /* glsl */`
#ifdef USE_SKINNING

	mat4 boneMatX = getBoneMatrix( skinIndex.x );
	mat4 boneMatY = getBoneMatrix( skinIndex.y );
	mat4 boneMatZ = getBoneMatrix( skinIndex.z );
	mat4 boneMatW = getBoneMatrix( skinIndex.w );

#endif
`;