1 2out vec4 sk_FragColor; 3uniform vec4 N; 4uniform vec4 I; 5uniform vec4 NRef; 6uniform vec4 colorGreen; 7uniform vec4 colorRed; 8vec4 main() { 9 float huge = faceforward(1.0, 1e+30, 1e+30); 10 vec2 huge2 = faceforward(vec2(1.0), vec2(1e+30), vec2(1e+30)); 11 vec3 huge3 = faceforward(vec3(1.0), vec3(1e+30), vec3(1e+30)); 12 vec4 huge4 = faceforward(vec4(1.0), vec4(1e+30), vec4(1e+30)); 13 vec4 expectedPos = vec4(huge) + huge2.xxxx; 14 vec4 expectedNeg = huge3.xxxx + huge4.xxxx; 15 expectedPos = vec4(1.0, 2.0, 3.0, 4.0); 16 expectedNeg = vec4(-1.0, -2.0, -3.0, -4.0); 17 return ((((((faceforward(N.x, I.x, NRef.x) == expectedNeg.x && faceforward(N.xy, I.xy, NRef.xy) == expectedNeg.xy) && faceforward(N.xyz, I.xyz, NRef.xyz) == expectedPos.xyz) && faceforward(N, I, NRef) == expectedPos) && -1.0 == expectedNeg.x) && vec2(-1.0, -2.0) == expectedNeg.xy) && vec3(1.0, 2.0, 3.0) == expectedPos.xyz) && vec4(1.0, 2.0, 3.0, 4.0) == expectedPos ? colorGreen : colorRed; 18} 19