// This is C2E2f_passthru from "The Cg Tutorial" (Addison-Wesley, ISBN
// 0321194969) by Randima Fernando and Mark J. Kilgard.  See page 62.

struct C3E1v_Output {
  float4 position : POSITION;
  float3 color    : COLOR;
};

C3E1v_Output C3E1v_anycolor(float2 position : POSITION,
                           uniform float3 constantColor)
{
  C3E1v_Output OUT;

  OUT.position = float4(position,0,1);
  OUT.color = constantColor;  // some RGB color

  return OUT;	
}