uniform float value;
uniform float minSat;
uniform float maxSat;
varying vec2 uv;

void main() {
	float chroma = (1.0 - uv.y) * value * (maxSat - minSat) + minSat;
	float X = chroma * (1.0 - (abs(mod(uv.x * 6.0, 2.0) - 1.0)));
	float m = value - chroma;
	
	chroma += m;
	X += m;
	
	vec3 rgb = vec3(chroma);
	vec2 lower = vec2(X, m);
	
	float segment = floor(uv.x * 6.0);
	if(segment == 0.0)
		rgb.gb = lower;
	else if(segment == 1.0)
		rgb.rb = lower;
	else if(segment == 2.0)
		rgb.br = lower;
	else if(segment == 3.0)
		rgb.gr = lower;
	else if(segment == 4.0)
		rgb.rg = lower;
	else// if(segment == 5.0)
		rgb.bg = lower;
	
	gl_FragColor = vec4(rgb, 1.0);
}