package model.color;

import util.Matrix;

public class ColorConst {
	
	public final static int NUM_CHAN = 3;
	
	private Matrix matrix = new Matrix();
	
//	public final static double [][] RGB_TRISTIM = {
//		{0.607, 0.174, 0.2000},
//		{0.299, 0.587, 0.114},
//		{0.00, 0.066, 1.116}};
	public final static double [][] RGB_TRISTIM = {
		{0.431, 0.342, 0.178},
		{0.222, 0.707, 0.071},
		{0.020, 0.130, 0.939}};
	public final static double [][] TRISTIM_CONES = {
		{0.61209, 2.14231, -0.02966},
		{-0.969775, 2.955775, 0.305425},
		{0, 0, 1.41183}};
//	public final static double [][] CONES_COLOR_OPP = {
//		{0.85, 1.50, 0.01},
//		{1.66, -2.43, 0},
//		{-0.34, -0.26, 0.71}};
	// fudge matrix to wipe out R_G and B_Y responses
	// on achromatic images
	public final static double [][] CONES_COLOR_OPP = {
		{0.85,  1.50,  0.01},
		{1.66, -2.23,  0.37},
		{0.34,  0.06, -0.71}};
//		{0.85, 1.50, 0.01},
//		{2.12, -2.43, 0},
//		{-0.27, -0.19, 0.71}};
	
	// image position constants
	public final static int R = 0;
	public final static int G = 1;
	public final static int B = 2;
	// tristimulus positions
	public final static int X = 0;
	public final static int Y = 1;
	public final static int Z = 2;
	// cone positions
	public final static int L = 0;
	public final static int M = 1;
	public final static int S = 2;
	// color opponent change position constants
	public final static int BL_WH = 0;
	public final static int R_G = 1;
	public final static int B_Y = 2;
	
	// methods to further the computations
	public double [][] getRGB_CONE(){
		double [][] temp = matrix.mMult(RGB_TRISTIM,TRISTIM_CONES);
		return temp;
	}
	public double [][] getTRISTIM_COLOR_OPP(){
		double [][] temp = matrix.mMult(TRISTIM_CONES, 
				CONES_COLOR_OPP);
		return temp;
	}
	public double [][] getRGB_COLOR_OPP(){
		double [][] temp = matrix.mMult(getRGB_CONE(), 
				CONES_COLOR_OPP);
		return temp;
	}
	
	public final static int ACHROMATIC = 0;
	public final static int RED_GREEN = 1;
	public final static int BLUE_YELLOW = 0;
	public final static String OPPONENT_CHANNELS [] = 
	       {"Achromatic","Red-Green","Blue-Yellow"};
}