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[require]
GLSL >= 1.10
[vertex shader passthrough]
[fragment shader]
uniform int front;
uniform int back;
const vec4 c = vec4(1.0, 0.0, 0.0, 0.0);
void main()
{
int f = gl_FrontFacing ? 1 : -1;
if (f == front) {
gl_FragColor = c.yxyx;
} else if (f == back) {
gl_FragColor = c.yyxx;
} else {
gl_FragColor = c.xyyx;
}
}
[test]
uniform int front 1
uniform int back -1
draw rect -1 -1 2 1
draw rect 1 0 -2 1
relative probe rgba (0, 0) (0.0, 1.0, 0.0, 1.0)
relative probe rgba (1, 0) (0.0, 1.0, 0.0, 1.0)
relative probe rgba (0, 1) (0.0, 0.0, 1.0, 1.0)
relative probe rgba (1, 1) (0.0, 0.0, 1.0, 1.0)
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