1
2out vec4 sk_FragColor;
3uniform float a;
4uniform float b;
5uniform float c;
6uniform vec4 d;
7uniform vec4 e;
8uniform vec4 f;
9void main() {
10    sk_FragColor.x = faceforward(a, b, c);
11    sk_FragColor = faceforward(d, e, f);
12}
13