9 gl_Position = gl_Vertex;
16 vec4 y_adjust(vec4 pos)
21 x = vec4(-0.5, 0.0, 0.0, 0.0);
23 x = vec4(1.5, 0.0, 0.0, 0.0);
26 return vec4(0.0, -0.5, 0.5, 0.0) + x;
28 return vec4(0.0, 1.5, 0.5, 0.0) + x;
33 gl_FragColor = sign(pos) + y_adjust(pos);
38 probe all rgb 0.5 0.5 0.5 0.5