sfml-fluid-simulation/Hsv.cpp at main · ypatel2022/sfml-fluid-simulation · GitHub

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#include <SFML/Graphics.hpp>

sf::Color Hsv(int hue, float sat, float val, float d)
{
	hue %= 360;
	while (hue < 0) hue += 360;

	if (sat < 0.f) sat = 0.f;
	if (sat > 1.f) sat = 1.f;

	if (val < 0.f) val = 0.f;
	if (val > 1.f) val = 1.f;

	int h = hue / 60;
	float f = float(hue) / 60 - h;
	float p = val * (1.f - sat);
	float q = val * (1.f - sat * f);
	float t = val * (1.f - sat * (1 - f));

	switch (h)
	{
	default:
	case 0:
	case 6: return sf::Color(val * 255, t * 255, p * 255, d);
	case 1: return sf::Color(q * 255, val * 255, p * 255, d);
	case 2: return sf::Color(p * 255, val * 255, t * 255, d);
	case 3: return sf::Color(p * 255, q * 255, val * 255, d);
	case 4: return sf::Color(t * 255, p * 255, val * 255, d);
	case 5: return sf::Color(val * 255, p * 255, q * 255, d);
	}
}