| /*#pragma settings NoRTFlip*/ |
| |
| uniform half4 testInputs; // equals (-1.25, 0, 0.75, 2.25) |
| uniform half4 colorGreen, colorRed; |
| |
| half4 main(float2 coords) { |
| half4 expected = half4(0); // derivative of a constant is zero |
| return (dFdy(testInputs.x) == expected.x && |
| dFdy(testInputs.xy) == expected.xy && |
| dFdy(testInputs.xyz) == expected.xyz && |
| dFdy(testInputs.xyzw) == expected.xyzw && |
| sign(dFdy(coords.xx)) == half2(0, 0) && |
| sign(dFdy(coords.yy)) == half2(1, 1) && |
| sign(dFdy(coords.xy)) == half2(0, 1)) ? colorGreen : colorRed; |
| } |