class Tools {
	public static function tilt (nr,overflow) {
		
		// returns a 'sin'-version of the numner: start slow first, then speeden up, then damp speed
		// for smooth animation
		// input: number between 0-1
		// output: nummer between 0-1
		// overflow : doorslaan-effect
		/*if (overflow!=null) {
			overflowcorrection = 1/ getPercentage (1+overflow);//(1+0.5*Math.cos(overflow+2*Math.PI));
			trace ("corr="+overflowcorrection);
		} else {
			overflow=0;
			overflowcorrection=1;
		}*/
		//trace (overflowcorrection);
		var input = nr*2;
		var output = .5*(1+Math.cos(Math.PI*(1+input)))*(overflow+1);
		if (input>1) {output = 1 + output*overflow}
		return output;
	}

	public static function toHex (value) {
		var hex = "000000"+value.toString(16);
		hex= hex.substr (hex.length-6,6);
		return hex;
	}
	
	public static function getValue (node) {
		return node.firstChild.nodeValue;
	} 
	
	public static function playSound(soundId,volume) {
		if (!_root.sounds) _root.sounds = new Array;
		if (!_root.sounds[soundId]) {
			var sound = new Sound;
			sound.attachSound (soundId);
			if (volume) sound.setVolume (volume);
			_root.sounds[soundId] = sound;
		}
		
		_root.sounds[soundId].start (0);
	
	}
	
	public static function replace (holder, searchfor, replacement) {
		var temparray = holder.split(searchfor);
		holder = temparray.join(replacement);
		return (holder);
	}
	
	/*public static function raise (errorString) {
		trace ("Error: "+errorString);
	}*/
	
	public static function firstCapital (str) {
		var newStr;
		if (str.toLowerCase().indexOf("ij")==0) newStr = str.substring(0,2).toUpperCase()+str.substring(2);
		else newStr = str.substring(0,1).toUpperCase()+str.substring(1);
		return newStr;
	}
	
	public static function removeAccents (str) {
		var accents=new Array;
		accents=[
			{
				searchFor : "èéêë",
				replacement : "e"
			},
			{
				searchFor : "àáäâ",
				replacement : "a"
			},
			{
				searchFor : "íîïì",
				replacement : "a"
			},
			{
				searchFor : "òóõö",
				replacement : "o"
			},
			{
				searchFor : "ùúü",
				replacement : "u"
			}
			
		]
		for (var i in accents) {
			for (var j=0; j<accents[i].searchFor.length; j++) {
				str = replace(str,accents[i].searchFor.charAt(j),accents[i].replacement);
			}
		}
		return str;
	}
	
	public static function contains (theArray,theValue) {
		/*
		* @pre typeof(theArray)='array'
		* @pre typeof(theValue)=='string'
		*/
		var found=false;
		for (var i in theArray) {
			
			if (theArray[i]==theValue) found=true;
		}
		return found;
	}
	
	public static function shuffle (theArray) {
		/*
		* @pre typeof(theArray)='array'
		*/

		return theArray.sort (function (a,b) {
			if (random(2)) return 1; 
		});
	}
	
	public static function toDegrees (rads) {
		return rads*180/Math.PI;
	}
	
}