30 lines
651 B
GLSL
30 lines
651 B
GLSL
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// 3x4 part of the model-to-world matrix
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attribute vec4 Instancing1;
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attribute vec4 Instancing2;
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attribute vec4 Instancing3;
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// Calculate a normal that has been transformed for instancing
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vec3 InstancingNormal(vec3 normal)
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{
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vec3 tmp;
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tmp.x = dot(vec3(Instancing1), normal);
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tmp.y = dot(vec3(Instancing2), normal);
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tmp.z = dot(vec3(Instancing3), normal);
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return tmp;
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}
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// Calculate position, transformed for instancing
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vec4 InstancingPosition(vec4 position)
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{
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vec3 tmp;
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tmp.x = dot(Instancing1, position);
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tmp.y = dot(Instancing2, position);
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tmp.z = dot(Instancing3, position);
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return vec4(tmp, 1.0);
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}
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