934d1f10b8
The 3 cascades are now rendered in a single pass, using 2D array texture and
a GS to do the dispatch ("layered rendering").
It's possible to use instancing instead but it requires the AMD_vertex_shader_layer
extension which is oddly part of opengl 4.2.
25 lines
403 B
GLSL
25 lines
403 B
GLSL
#version 330 core
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uniform mat4 ModelViewProjectionMatrix[3];
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layout(triangles) in;
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layout(triangle_strip, max_vertices=9) out;
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in vec2 tc[3];
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out vec2 uv;
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void main(void)
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{
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for (int j = 0; j<3; j++)
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{
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gl_Layer = j;
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for(int i=0; i<3; i++)
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{
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uv = tc[i];
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gl_Position = ModelViewProjectionMatrix[j] * gl_in[i].gl_Position;
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EmitVertex();
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}
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EndPrimitive();
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}
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}
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