generated from karl/cpp-template
karl
9ab7f3eed0
the example from https://learnopengl.com/Advanced-OpenGL/Geometry-Shader is functional; built with SCons.
32 lines
830 B
GLSL
32 lines
830 B
GLSL
#version 330 core
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layout (points) in;
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layout (triangle_strip, max_vertices = 5) out;
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in VS_OUT {
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vec3 color;
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} gs_in[];
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out vec3 fColor;
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void build_house(vec4 position)
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{
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fColor = gs_in[0].color; // gs_in[0] since there's only one input vertex
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gl_Position = position + vec4(-0.2, -0.2, 0.0, 0.0); // 1:bottom-left
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EmitVertex();
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gl_Position = position + vec4( 0.2, -0.2, 0.0, 0.0); // 2:bottom-right
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EmitVertex();
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gl_Position = position + vec4(-0.2, 0.2, 0.0, 0.0); // 3:top-left
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EmitVertex();
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gl_Position = position + vec4( 0.2, 0.2, 0.0, 0.0); // 4:top-right
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EmitVertex();
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gl_Position = position + vec4( 0.0, 0.4, 0.0, 0.0); // 5:top
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fColor = vec3(1.0, 1.0, 1.0);
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EmitVertex();
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EndPrimitive();
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}
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void main() {
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build_house(gl_in[0].gl_Position);
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}
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