//	Spludlow Software
//	Copyright © Samuel P. Ludlow 2020 All Rights Reserved
//	Distributed under the terms of the GNU General Public License version 3
//	Distributed WITHOUT ANY WARRANTY; without implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE
//	https://www.spludlow.co.uk/LICENCE.TXT
//	The Spludlow logo is a registered trademark of Samuel P. Ludlow and may not be used without permission
//	v1.14

using System;
using System.Windows.Media;

namespace Spludlow.Media
{
	public class Colour
	{
		public static Color FromHSV(double hue, double saturation, double value)
		{
			int hi = Convert.ToInt32(Math.Floor(hue / 60)) % 6;
			double f = hue / 60 - Math.Floor(hue / 60);

			value = value * 255;
			byte v = Convert.ToByte(value);
			byte p = Convert.ToByte(value * (1 - saturation));
			byte q = Convert.ToByte(value * (1 - f * saturation));
			byte t = Convert.ToByte(value * (1 - (1 - f) * saturation));

			if (hi == 0)
				return Color.FromArgb(255, v, t, p);
			else if (hi == 1)
				return Color.FromArgb(255, q, v, p);
			else if (hi == 2)
				return Color.FromArgb(255, p, v, t);
			else if (hi == 3)
				return Color.FromArgb(255, p, q, v);
			else if (hi == 4)
				return Color.FromArgb(255, t, p, v);
			else
				return Color.FromArgb(255, v, p, q);
		}
	}
}