// Easing equation, borrowed from jQuery easing plugin
// http://gsgd.co.uk/sandbox/jquery/easing/
jQuery.easing.easeOutQuart = function (x, t, b, c, d) {
	return -c * ((t=t/d-1)*t*t*t - 1) + b;
};

var current = 0;
var offset = 0;

jQuery(function( $ ){

	$.scrollTo.defaults.axis = 'x'; 
	
	$(window).resize(function(){
		setup();		
	});
	setup();


	$.easing.elasout = function(x, t, b, c, d) {
		var s=1.70158;var p=0;var a=c;
		if (t==0) return b;  if ((t/=d)==1) return b+c;  if (!p) p=d*.3;
		if (a < Math.abs(c)) { a=c; var s=p/4; }
		else var s = p/(2*Math.PI) * Math.asin (c/a);
		return a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b;
	};

});



function st(id){
	$.scrollTo( $("#"+id) , 800 , {offset:offset});
	return false;
}

function setup(){
	
	var total = $('.painting').length;
	if(total > 0){
		var pageSize = getPageSize();


		//Set distance between paintings
		var width = pageSize[0] / 2  + 100;
		if(width < 500) width = 500;
		
		var height	= pageSize[1];
		var space 	= height - 70 - 30;
		if(space < 500) space = 500;
		var top		= 70 + (space - 500) / 2;
		
		
		$('.painting').css({marginTop:top});

		$('.painting').css({width:width});
		offset = -(pageSize[0]-width)/2;		

		var left = -offset;
		$('#painting_0').css({paddingLeft:left}); 
		
		var bigWidth = (total*width + left * 2)
		$('#scroller').css({width:bigWidth}); 

	}

}


function getPageSize(){
	var de = document.documentElement;
	var w = window.innerWidth || self.innerWidth || (de&&de.clientWidth) || document.body.clientWidth;
	var h = window.innerHeight || self.innerHeight || (de&&de.clientHeight) || document.body.clientHeight;
	arrayPageSize = [w,h];
	return arrayPageSize;
}