/************************************************************************************************************
(C) www.dhtmlgoodies.com, October 2005

This is a script from www.dhtmlgoodies.com. You will find this and a lot of other scripts at our website.	

Terms of use:
You are free to use this script as long as the copyright message is kept intact. However, you may not
redistribute, sell or repost it without our permission.

Thank you!

www.dhtmlgoodies.com
Alf Magne Kalleland

************************************************************************************************************/
	

function numberBaseConverter (number,oldBase,newBase) {
	number = number + "";
	number = number.toUpperCase();
	var characters = "0123456789ABCDEF";
	var dec = 0;
	for (var no = 0; no <=  number.length; no++) {
		dec += (characters.indexOf(number.charAt(no))) * (Math.pow(oldBase , (number.length - no - 1)));
	}
	number = "";
	var magnitude = Math.floor((Math.log(dec))/(Math.log(newBase)));
	for (var no = magnitude; no >= 0; no--) {
		var amount = Math.floor(dec/Math.pow(newBase,no));
		number = number + characters.charAt(amount); 
		dec -= amount*(Math.pow(newBase,no));
	}
	if(number.length==0)number=0;
	return number;
}

// Converts a RGB color to HSV
function toHSV(rgbColor){
	rgbColor = rgbColor.replace('#','');		
	
	red = numberBaseConverter(rgbColor.substr(0,2),16,10);
	green = numberBaseConverter(rgbColor.substr(2,2),16,10);
	blue = numberBaseConverter(rgbColor.substr(4,2),16,10);
	if(red.length==0)red=0;
	if(green.length==0)green=0;
	if(blue.length==0)blue=0;
	red = red/255;
	green = green/255;
	blue = blue/255;
	
	maxValue = Math.max(red,green,blue);
	minValue = Math.min(red,green,blue);
	
	var hue = 0;
	
	if(maxValue==minValue){
		hue = 0;
		saturation=0;
	}else{
		if(red == maxValue){
			hue = (green - blue) / (maxValue-minValue)/1;	
		}else if(green == maxValue){
			hue = 2 + (blue - red)/1 / (maxValue-minValue)/1;	
		}else if(blue == maxValue){
			hue = 4 + (red - green) / (maxValue-minValue)/1;	
		}
		saturation = (maxValue-minValue) / maxValue;
	}
	hue = hue * 60; 
	valueBrightness = maxValue;
	
	if(valueBrightness/1<0.5){
		//saturation = (maxValue - minValue) / (maxValue + minValue);
	}
	if(valueBrightness/1>= 0.5){
		//saturation = (maxValue - minValue) / (2 - maxValue - minValue);
	}	
		
	
	returnArray = [hue,saturation,valueBrightness];
	return returnArray;
}

function toRgb(hue,saturation,valueBrightness){
	Hi = Math.floor(hue / 60);
	if(hue==360)Hi=0;
	f = hue/60 - Hi;
	p = (valueBrightness * (1- saturation)).toPrecision(2);
	q = (valueBrightness * (1 - (f * saturation))).toPrecision(2);
	t = (valueBrightness * (1 - ((1-f)*saturation))).toPrecision(2);

	switch(Hi){
		case 0:
			red = valueBrightness;
			green = t;
			blue = p;				
			break;
		case 1: 
			red = q;
			green = valueBrightness;
			blue = p;
			break;
		case 2: 
			red = q;
			green = valueBrightness;
			blue = t;
			break;
		case 3: 
			red = p;
			green = q;;
			blue = valueBrightness;
			break;
		case 4:
			red = t;
			green = p;
			blue = valueBrightness;
			break;
		case 5:
			red = valueBrightness;
			green = p;
			blue = q;
			break;
	}
	
	if(saturation==0){
		red = valueBrightness;
		green = valueBrightness;
		blue = valueBrightness;		
	}
	
	red*=255;
	green*=255;
	blue*=255;

	red = Math.round(red);
	green = Math.round(green);
	blue = Math.round(blue);	
	
	red = numberBaseConverter(red,10,16);
	green = numberBaseConverter(green,10,16);
	blue = numberBaseConverter(blue,10,16);
	
	red = red + "";
	green = green + "";
	blue = blue + "";

	while(red.length<2){
		red = "0" + red;
	}	
	while(green.length<2){
		green = "0" + green;
	}	
	while(blue.length<2){
		blue = "0" + "" + blue;
	}
	rgbColor = "#" + red + "" + green + "" + blue;
	return rgbColor.toUpperCase();
}

function findColorByDegrees(rgbColor,degrees){
	rgbColor = rgbColor.replace('#','');
	myArray = toHSV(rgbColor);
	myArray[0]+=degrees;
	if(myArray[0]>=360)myArray[0]-=360;
	if(myArray[0]<0)myArray[0]+=360;	
	return toRgb(myArray[0],myArray[1],myArray[2]);
}

function findColorByBrightness(rgbColor,brightness){
	
	rgbColor = rgbColor.replace('#','');
	myArray = toHSV(rgbColor);
	
	myArray[2]+=brightness/100;
	if(myArray[2]>1)myArray[2]=1;
	if(myArray[2]<0)myArray[2]=0;	
	
	myArray[1]+=brightness/100;
	if(myArray[1]>1)myArray[1]=1;
	if(myArray[1]<0)myArray[1]=0;		
	
	return toRgb(myArray[0],myArray[1],myArray[2]);	
	
}