1uniform half4 colorGreen, colorRed; 2 3half4 main(float2) { 4 float4 color; 5 color = float4(colorGreen) * 0.5; // 0, 0.5, 0, 0.5 6 color.a = 2.0; // 0, 0.5, 0, 2 7 color.g /= 0.25; // 0, 2, 0, 2 8 color.gba *= float3(0.5); // 0, 1, 0, 1 9 color.bgar += float4(0.25, 0.0, 0.0, 0.75); // 0.75, 1, 0.25, 1 10 color.r += color.a <= 1.0 ? color.b : 0.0; // 1, 1, 0.25, 1 11 12 return (color == float4(1, 1, 0.25, 1)) ? colorGreen : colorRed; 13} 14