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| void instancingStage(inout vec3 positionMC)
| {
| mat4 instancingTransform;
|
| #ifdef HAS_INSTANCE_MATRICES
| instancingTransform = mat4(
| a_instancingTransformRow0.x, a_instancingTransformRow1.x, a_instancingTransformRow2.x, 0.0, // Column 1
| a_instancingTransformRow0.y, a_instancingTransformRow1.y, a_instancingTransformRow2.y, 0.0, // Column 2
| a_instancingTransformRow0.z, a_instancingTransformRow1.z, a_instancingTransformRow2.z, 0.0, // Column 3
| a_instancingTransformRow0.w, a_instancingTransformRow1.w, a_instancingTransformRow2.w, 1.0 // Column 4
| );
| #else
| vec3 translation = vec3(0.0, 0.0, 0.0);
| vec3 scale = vec3(1.0, 1.0, 1.0);
|
| #ifdef HAS_INSTANCE_TRANSLATION
| translation = a_instanceTranslation;
| #endif
| #ifdef HAS_INSTANCE_SCALE
| scale = a_instanceScale;
| #endif
|
| instancingTransform = mat4(
| scale.x, 0.0, 0.0, 0.0,
| 0.0, scale.y, 0.0, 0.0,
| 0.0, 0.0, scale.z, 0.0,
| translation.x, translation.y, translation.z, 1.0
| );
| #endif
|
| positionMC = (instancingTransform * vec4(positionMC, 1.0)).xyz;
| }
|
|
