1  #version 450 core
 2  
 3  void main()
 4  {
 5      int low = gl_VertexIndex & 1;
 6      int high = gl_VertexIndex >> 1;
 7      gl_Position.x = (float(low) - 0.5f) * 2.0f;
 8      gl_Position.y = (float(high) - 0.5f) * 2.0f;
 9      gl_Position.z = 0.0f;
10      gl_Position.w = 1.0f;
11  }