[require]
GLSL >= 1.20

[vertex shader file]
glsl-mvp.vert

[fragment shader]
#version 120
void main() {
    const float one = tan(0.785398163397448);
    const float sqrt3 = tan(1.0471975511965976);
    const float zero = tan(0.0);

    gl_FragColor = vec4(zero, one, sqrt3 - 1.0, 1.0);
}

[test]
clear color 0.0 0.0 0.0 0.0
clear
ortho
draw rect 10 10 10 10
probe rgb 15 15 0.0 1.0 0.7320508075688772