27 lines
562 B
GLSL
27 lines
562 B
GLSL
#version 430 core
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layout (points) in;
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layout (triangle_strip, max_vertices = 4) out;
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uniform vec2 lightPos;
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uniform mat4 worldMat;
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void emitLine (vec2 pa)
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{
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gl_Position = vec4 (pa, 0, 1);
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EmitVertex();
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gl_Position = vec4 (pa + (200 * (pa - lightPos)), 0 , 1);
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EmitVertex();
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}
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void main()
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{
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vec4 frontL4 = worldMat * vec4(gl_in[0].gl_Position.xy, 0 ,1);
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vec4 frontR4 = worldMat * vec4(gl_in[0].gl_Position.zw, 0 ,1);
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vec2 frontL = frontL4.xy;
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vec2 frontR = frontR4.xy;
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emitLine (frontR);
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emitLine (frontL);
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EndPrimitive();
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}
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