// Avoid `console` errors in browsers that lack a console.
(function() {
    var method;
    var noop = function () {};
    var methods = [
        'assert', 'clear', 'count', 'debug', 'dir', 'dirxml', 'error',
        'exception', 'group', 'groupCollapsed', 'groupEnd', 'info', 'log',
        'markTimeline', 'profile', 'profileEnd', 'table', 'time', 'timeEnd',
        'timeStamp', 'trace', 'warn'
    ];
    var length = methods.length;
    var console = (window.console = window.console || {});

    while (length--) {
        method = methods[length];
        // Only stub undefined methods.
        if (!console[method]) {
            console[method] = noop;
        }
    }
}());

// Place any jQuery/helper plugins in here.
function checkContentHeight(target){
	var stageHeight=$( window ).height();
	var newHeight = (stageHeight/2)-(target.height()/2);
	return newHeight;
}

function checkContentWidth(target){
	var stageWidth=$( window ).width();
	var newWidth = (stageWidth/2)-(target.width()/2);
	return newWidth;
}

function getDeviceVer() {
	var ua = navigator.userAgent;
	var uaindex;
	
	// determine OS
	if ( ua.match(/(iPad|iPhone|iPod touch)/) ){
		userOS = 'iOS';
		uaindex = ua.indexOf( 'OS ' );
	}else if ( ua.match(/Android/) ){
		userOS = 'Android';
		uaindex = ua.indexOf( 'Android ' );
	}else{
		userOS = 'unknown';
	}
	
	// determine version
	if ( userOS === 'iOS' && uaindex > -1 ){
		userOSver = ua.substr( uaindex + 3, 3 ).replace( '_', '.' );
	}else if ( userOS === 'Android'  &&  uaindex > -1 ){
		userOSver = ua.substr( uaindex + 8, 3 );
	}else{
		userOSver = 'unknown';
	}
	return Number(userOSver)
}

function shuffle(array) {
	var currentIndex = array.length
	, temporaryValue
	, randomIndex
	;
	
	// While there remain elements to shuffle...
	while (0 !== currentIndex) {
		// Pick a remaining element...
		randomIndex = Math.floor(Math.random() * currentIndex);
		currentIndex -= 1;
		
		// And swap it with the current element.
		temporaryValue = array[currentIndex];
		array[currentIndex] = array[randomIndex];
		array[randomIndex] = temporaryValue;
	}
	
	return array;
}

function randomBoolean(){
    return Math.random() < 0.5;
}

function getDistance(sx, sy, ex, ey) {
	var dis = Math.sqrt(Math.pow(sx - ex, 2) + Math.pow(sy - ey, 2));
	return dis;
}

function sortOnObject(array, object, rev) {
	if(rev){
		array.sort(function(a, b){
			var a1= a[object], b1= b[object];
			if(a1== b1) return 0;
			return a1< b1? 1: -1;
		});
	}else{
		array.sort(function(a, b){
			var a1= a[object], b1= b[object];
			if(a1== b1) return 0;
			return a1> b1? 1: -1;
		});
	}
	return array;
}

function randomIntFromInterval(min,max){
    return Math.floor(Math.random()*(max-min+1)+min);
}

function addCommas(nStr) {
    nStr += '';
    x = nStr.split('.');
    x1 = x[0];
    x2 = x.length > 1 ? '.' + x[1] : '';
    var rgx = /(\d+)(\d{3})/;
    while (rgx.test(x1)) {
        x1 = x1.replace(rgx, '$1' + ',' + '$2');
    }
    return x1 + x2;
}

function swapArray(input, index_A, index_B) {
    var temp = input[index_A];
 
    input[index_A] = input[index_B];
    input[index_B] = temp;
}

function getCenterPosition(startX, startY, endX, endY) {
	var pos = {x:0, y:0}
    pos.x=(startX+endX)/2;
    pos.y=(startY+endY)/2;
	return pos;
}

function setRotation(x1, y1, x2, y2) {
    var radiance = 180/Math.PI;
    var walkdirection = -(Math.atan2(x2-x1, y2-y1))*radiance;
    return walkdirection - 90;
}

function isEven(value) {
	if (value%2 == 0)
		return true;
	else
		return false;
}