Scalar Data Visualization: Part 3

//-----------------------------------------------------------------------------
// File: ScoOteRColorPalet.cs
//
// DemolitiOn is My MissiOn
//
// Copyright (c) Ibrahim Hamed. All rights reserved.
//-----------------------------------------------------------------------------

using System;
using System.Drawing;
using System.Collections.Generic;
using System.Text;

namespace ScoOteRLoAdeR
{
	class ScoOteRColorPalet
	{
		private static Color[] palet;
		private static double Step;
		private static double Min;
		public static void SetPalet()
		{
			palet = new Color[120];
			//palet[0] = Color.DarkBlue;
			//palet[1] = Color.Blue;
			//palet[2] = Color.DodgerBlue;
			//palet[3] = Color.LightGreen;
			//palet[4] = Color.DarkGreen;
			//palet[5] = Color.YellowGreen;
			//palet[6] = Color.Yellow;
			//palet[7] = Color.Red;
			//palet[8] = Color.DarkRed;

			float m = 0;
			
			// red to yellow
			for (int i = 0; i < 30; i++)
			{
				m = m + 0.03f;
				palet[i] = Color.FromArgb(255, (int)(m * 255), 0);
			}

			m = 1;
			//yellow to green
			for (int i = 30; i < 60; i++)
			{
				m = m - 0.03f;
				palet[i] = Color.FromArgb((int)(m * 255), 255, 0);
			}
			m = 0;
			//green to cyan
			for (int i = 60; i < 90; i++)
			{
				m = m + 0.03f;
				palet[i] = Color.FromArgb(0, 255, (int)(m * 255));
			}
			m = 1;

			for (int i = 90; i < 120; i++)
			{
				m = m - 0.03f;
				palet[i] = Color.FromArgb(0, (int)(m * 255), 255);
			}

		}
		public static void SetBound(double Max, double MiN)
		{
			Step = (Max - MiN) / 119;
			Min = MiN;
			//Step = (Max - MiN) / 4;
		}
		public static int GetColor(double Value)
		{
			return (Step == 0)?palet[0].ToArgb():palet[119-(int)((Value - Min) / Step)].ToArgb();
			//int region = (int)(Value / Step);
			//switch (region)
			//{
			//    case 0:
			//        return Color.FromArgb(0, (int)(Math.Min(1, Math.Abs(((Value - Min) / Step))) * 255), 255).ToArgb();//(0, 0, 255 - (int)(Math.Abs(((Value - Min) / Step)) * 128)).ToArgb();
			//        break;
			//    case 1:
			//        return Color.FromArgb(0, 255, (int)(Math.Min(1, Math.Abs((( Step - (Value - (Min + Step)))) / Step)) * 255)).ToArgb();//(0, (int)(Math.Abs(((Value - (Min + Step)) / Step)) * 128), 128).ToArgb();
			//        break;
			//    case 2:
			//        return Color.FromArgb((int)(Math.Min(1, Math.Abs((((Value - (Min + Step * 2))) / Step))) * 255), 255, 0).ToArgb();//((int)(Math.Abs((((Value - (Min + Step * 2))) / Step)) * 128), 128, 0).ToArgb();
			//        break;
			//    default:
			//        return Color.FromArgb(255, (int)(Math.Min(1, Math.Abs(((Step - ((Value - (Min + Step * 3)))) / Step))) * 255), 0).ToArgb();//(127 + (int)(Math.Abs((((Value - (Min + Step * 3))) / Step)) * 128), 0, 0).ToArgb();
			//        break;
			//}
			//return 0;
		}
		public static Color[] Palet
		{
			get { return palet; }
		}
		public static double MIN
		{
			get { return Min; }
		}
		public static double STEP
		{
			get { return Step; }
		}
	}
}