24 lines
527 B
Plaintext
24 lines
527 B
Plaintext
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#version 150 compatibility
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#extension GL_EXT_geometry_shader4 : enable
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out vec3 eye_position;
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out vec3 normal;
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void main()
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{
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vec3 p0 = gl_PositionIn[0].xyz;
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vec3 p1 = gl_PositionIn[1].xyz;
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vec3 p2 = gl_PositionIn[2].xyz;
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normal = normalize(gl_NormalMatrix * cross(p2-p0,p1-p0));
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for (int i=0; i<3; ++i) {
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vec4 heye_position = gl_ModelViewMatrix * gl_PositionIn[i];
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eye_position = heye_position.xyz / heye_position.w;
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gl_Position = gl_ProjectionMatrix * heye_position;
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EmitVertex();
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}
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EndPrimitive();
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}
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