progs/vpglsl/ifelse.glsl

   1
   2 void main() {
   3     gl_Position = gl_Vertex;
   4     if (gl_Position.x < 0.5)
   5         gl_FrontColor = vec4(1.0, 0.0, 0.0, 1.0);
   6     else
   7         gl_FrontColor = gl_Color;
   8 }