source: data/data_extern/programs/GLSL150/AtomicGS.glsl

#version 150

// Trivial GLSL geometry shader that doubles a mesh.

uniform mat4 WorldViewProj;

layout(triangles) in;
layout(triangle_strip, max_vertices = 6) out;
 
void main(void) 
{
    for (int i = 0; i < gl_in.length(); ++i) {
        gl_Position = WorldViewProj * gl_in[i].gl_Position;
        EmitVertex();
    }
    EndPrimitive();

    for (int i = 0; i < gl_in.length(); ++i) {
        const vec4 world_offset = vec4(50, 50, 50, 0);
        gl_Position = WorldViewProj * (gl_in[i].gl_Position + world_offset);
        EmitVertex();
    }
    EndPrimitive();
}