1uniform half4 N, I, NRef; 2uniform half4 colorGreen, colorRed; 3 4half4 main(float2 xy) { 5 6 const half4 constN = half4(1, 2, 3, 4); 7 const half4 constI = half4(1, 1, -100, 1); 8 const half4 constNRef = half4(1); 9 10 half4 expectedPos = half4(1, 2, 3, 4); 11 half4 expectedNeg = -half4(1, 2, 3, 4); 12 13 return (faceforward(N.x, I.x, NRef.x ) == expectedNeg.x && 14 faceforward(N.xy, I.xy, NRef.xy ) == expectedNeg.xy && 15 faceforward(N.xyz, I.xyz, NRef.xyz ) == expectedPos.xyz && 16 faceforward(N.xyzw, I.xyzw, NRef.xyzw ) == expectedPos.xyzw && 17 faceforward(constN.x, constI.x, constNRef.x ) == expectedNeg.x && 18 faceforward(constN.xy, constI.xy, constNRef.xy ) == expectedNeg.xy && 19 faceforward(constN.xyz, constI.xyz, constNRef.xyz ) == expectedPos.xyz && 20 faceforward(constN.xyzw, constI.xyzw, constNRef.xyzw) == expectedPos.xyzw) ? colorGreen 21 : colorRed; 22} 23