/************************************************************************************************************
(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('#','');		
	
	var red = numberBaseConverter(rgbColor.substr(0,2),16,10);
	var green = numberBaseConverter(rgbColor.substr(2,2),16,10);
	var 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;
	
	var maxValue = Math.max(red,green,blue);
	var minValue = Math.min(red,green,blue);
	
	var hue = 0;
	var saturation;
	
	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; 
	var valueBrightness = maxValue;
	
	if(valueBrightness/1<0.5){
		//saturation = (maxValue - minValue) / (maxValue + minValue);
	}
	if(valueBrightness/1>= 0.5){
		//saturation = (maxValue - minValue) / (2 - maxValue - minValue);
	}	
		
	
	var returnArray = [hue,saturation,valueBrightness];
	return returnArray;
}

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

  var red, green, blue;
  
	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;
	}
	var rgbColor = "#" + red + "" + green + "" + blue;
	return rgbColor.toUpperCase();
}

function findColorByDegrees(rgbColor,degrees){
	rgbColor = rgbColor.replace('#','');
	var 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('#','');
	var 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]);	
	
}