A Pen by Lucas Alba.

ahCBE.markdown

2D and 3D carousel using css perspective

A Pen by Lucas Alba on CodePen.

License.

index.html

	<div class='wrapper'>
	<section id="container" class='twoD'>
		<figure id="carousel" class=''></figure>
	</section>
	</div>
	<section id="ctrls">
		<div id='dots'></div>
		<div>
			<div>
				Total: <label id="nodeCountLbl"  for="nodeCountCtrl"></label>
				<input id="nodeCountCtrl" type="range"/>
			</div>
			<div>
				Position:<label id="posCtrlLbl"  for="posCtrl">Position</label>
				<input id="posCtrl" type="range"/>
			</div>
		</div>
		<div >
			<button id="prev" data-increment="-1">Previous</button>
			<button id="next" data-increment="1">Next</button>
			<button id="axisCtrl">Toggle Carousel Axis</button>
			<button id="backfaceCtrl">Backface</button>
			<button id="3DCtrl">3D Toggle</button>
		</div>
	</section>

script.js

var Carousel = (function($){
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	var modTransform = Modernizr.prefixed('transform');
	//config
	var _obj ={	
		elem: undefined,
		nodes: 10,
		max: 20,
		radius: 100,
		axis : "y",
		nodeCtrl: undefined,
		nodeCtrlLbl: undefined,
		axisCtrl:undefined,
		nextBtnCtrl:undefined,
		previousBtnCtrl:undefined,
		backfaceCtrl:undefined,
		posCtrl:undefined,
		posCtrlLbl:undefined,
		generateElems:false,
		dotsCtrl:false,
		nodeName:"",
		displayBackface:true,
		generateColors:false
	};
	var _rotations = {x:'rotateX', y:'rotateY'};
	var _rotOpp = {x:'y', y:'x'};
	function enableAxisCtrl(){
	if(_obj.axisCtrl !==undefined)
		_obj.axisCtrl.click( function(){toggleAxis();});
	}
	function enableBackfaceCtrl(){
		if(_obj.backfaceCtrl !==undefined)
			_obj.backfaceCtrl.click( function(){toggleBackface()});
	}
	function enableNextCtrl(){
		if(_obj.nextBtnCtrl !==undefined)
			_obj.nextBtnCtrl.click( function(){move(_obj.axis === "y"?~_obj.pos+2:_obj.pos+1);});
	}
	function enableDots(){
		if(_obj.dotsCtrl !==undefined){
			var i,l,tmp = document.createDocumentFragment();
			for(i=0,l=len();i<l;i+=1){
				tmp.appendChild($('<figure>').addClass('dotOff').get(0));
				console.log('loop '+i)
			}
			_obj.dotsCtrl.empty().html(tmp).children().on('click', function(){
				var idx =$(this).index();
				_obj.posCtrl ? _obj.posCtrl.val(idx).change() :	move(idx);
				dotPos(idx);
			});
		}
	}
	this.dotPos=function(pos){
		_obj.dotsCtrl.children().removeClass('dotOn').eq(pos).addClass('dotOn');
	};
	function enablePrevCtrl(){
		if(_obj.previousBtnCtrl !==undefined)
			_obj.previousBtnCtrl.click( function(){move(_obj.axis === "y"?~_obj.pos:_obj.pos-1);});
	}
	function enablePosCtrl(){
		if(_obj.posCtrl !==undefined){
			_obj.posCtrl.attr({"max":_obj.nodes-1}).val(_obj.pos).on('change',function(){
				move(this.value);				
				if(posCtrlLbl !== undefined){
					_obj.posCtrlLbl.text(this.value);
				}
			});
		}
	}
	function enableCountCtrl(){
		if(_obj.nodeCtrl !== undefined){
			//validate and correct: max input
			_obj.nodeCtrl.val(_obj.nodes >_obj.max?_obj.max:_obj.nodes).attr({"max":(_obj.max),"step":"1","min":"2"});
			_obj.nodeCtrl.change( function( event ) {
				//validate and correct: /*odd and*/ max
				var val = (this.value>_obj.max?_obj.max:this.value);//>>1<<1;
				if(_obj.nodeCtrlLbl !== undefined)//update label
					_obj.nodeCtrlLbl.text(val+" "+_obj.nodeName);
				if(val !== this.value)//update input if invalid
					_obj.nodeCtrl.val(val);
				len(val);
			});
			//init the CtrlLbl
			if(_obj.nodeCtrlLbl !== undefined){
				_obj.nodeCtrlLbl.text(_obj.nodes+" "+_obj.nodeName);
			}
		}
	}
	this.toggleBackface = function(){_obj.elem.toggleClass('backface');	};
	this.init = function(_opts){
		if(_opts.elem === undefined || _opts.elem ===null)
			throw new Error("Carousel.init(object): Requires object.elem type HTML elemtent");
		$.extend(true,_obj,_opts);	
		_obj.elem.addClass("carousel");
		//Generate new children with pos + click event if resetflag
		if(_obj.generateElems){
			var tmp = document.createDocumentFragment();
			for(var i=0,l=_obj.max;i<l;++i){
				tmp.appendChild(($('<figure>').attr({"data-pos":(i)}).html(i).get(0)));
			}
			_obj.elem.empty().html(tmp);
			_obj.nodes = _obj.nodes;
		}
		else{
			_obj.nodes =_obj.max= _obj.elem.children().length;
			_obj.elem.children().each(function(n){
				$(this).attr({"data-pos":(n)});
			});
		}
		if(!_obj.displayBackface)
			_obj.elem.toggleClass('backface');
		$.extend(_obj,{ pos:0, mid:(_obj.nodes>>1), rot:0, nodeSlice: (360 / _obj.nodes)});
		morph();
		enablePosCtrl();
		enableCountCtrl();
		enableAxisCtrl();
		enableBackfaceCtrl();
		enableNextCtrl();
		enablePrevCtrl();
		$('body').addClass('ready');
		console.log('Ready');
		return this;
	};
	function morph(){
		enableDots();
		var e  =_obj.elem[0];
		var nodeSize = e[_obj.axis=="x" ? 'offsetHeight':'offsetWidth'  ];
		var nodeSlice = (360 / _obj.nodes);
		_obj.radius = Math.round( ( nodeSize >>1) / Math.tan( Math.PI / _obj.nodes ) );
		for (i=0,ang=0,l=_obj.nodes;i<l;i++ ){
			ang = nodeSlice * i;
			if(_obj.generateColors)
				$(e.children[i]).css({"display":"block","background-color":'hsla(' + ang + ', 100%, 50%, 1)'})[0].style[ modTransform ] = _rotations[_obj.axis] +'(' + (ang*=_obj.axis==="y"?1:-1) + 'deg) translateZ(' + _obj.radius + 'px)';
			else
				$(e.children[i]).css({"display":"block",})[0].style[ modTransform ] = _rotations[_obj.axis] +'(' + (ang*=_obj.axis==="y"?1:-1) + 'deg) translateZ(' + _obj.radius + 'px)';
		}
		for (l=_obj.max;i<=l;i++)//hide unused nodes
			$(e.children[i]).css({"display":"none"});
		e.style[modTransform] = 'translateZ(-' + _obj.radius + 'px) '+_rotations[_obj.axis]+'(' +_obj.rot+ 'deg)';
		dotPos(Math.abs(_obj.pos)%len());
		if(posCtrlLbl !== undefined){
			_obj.posCtrlLbl.text(Math.abs(_obj.pos));
		}
		console.log(_obj.pos);
	};
	this.toggleAxis = function(){
		_obj.axis = _rotOpp[_obj.axis]; 
		var pos= _obj.pos;
		this.len(_obj.nodes);
		move(pos);
		return this;
	};
	this.len = function(val){
		if(val == undefined)
			return _obj.nodes;
		console.log("len");
		_obj.nodes = val;
		_obj.pos =0;
		_obj.rot =360/_obj.nodes*_obj.pos;
		_obj.nodeSlice = (360 / _obj.nodes);
		enablePosCtrl();
		move(0);
		return this;
	};
	this.move= function(n){
		n= _obj.axis=="y"?~n+1:n;
		_obj.pos = n;
		_obj.rot =(360/_obj.nodes*(_obj.pos));
		morph();	
		return this;
	};
	$(window).resize(function() {
	  morph();
	});
	return this;
})(jQuery);
$(document).ready(function(){
		Carousel.init({		
			elem: $('#carousel'),
			nodeCtrl: $('#nodeCountCtrl'),
			nodeCtrlLbl:$('#nodeCountLbl'),
			posCtrl:$('#posCtrl'),
			posCtrlLbl:$('#posCtrlLbl'),
			previousBtnCtrl:$('#prev'),
			nextBtnCtrl:$('#next'),
			axisCtrl:$('#axisCtrl'),
			backfaceCtrl:$('#backfaceCtrl'),
			nodes:13,
			max:100,
			dotsCtrl:$('#dots'),
			generateElems:true,
			generateColors:true,
			displayBackface:false,
		});
	});
	$('#3DCtrl').click(function(){$('#container').toggleClass('twoD threeD');})

style.css

.carousel * {max-width:100%;	max-height:100%;}
.carousel {
  width: 100%;
  height: 100%;
  position: absolute;
  -webkit-transform-style: preserve-3d;
		  transform-style: preserve-3d;
}
.carousel > * {
  display: block;
  position: absolute;
  width: 100%;
  height: 100%;
  margin: 0;
  padding:0;
}

.carousel.backface > * {
  -webkit-backface-visibility: hidden;
		  backface-visibility: hidden;
}
.carousel {
  -webkit-transition: -webkit-transform 1s;
		  transition: transform 1s;
}
.carousel > *{
  -webkit-transition: opacity 1s, -webkit-transform 1s;
		  transition: opacity 1s, transform 1s;
}
/**/
.floatleft{	float :left;}
.floatright{float :right;}
.textalignleft{	text-align:left;}
#ctrls {
	position:fixed;
	bottom:0;
}
figure {
	display: block;
	-webkit-margin-before: 0;
	-webkit-margin-after: 0;
	-webkit-margin-start: 0;
	-webkit-margin-end: 0;
}
.wrapper{
width:100%;
overflow:hidden;

}
#dots {
	width: 100%;
	float: left;
}
.dotOff {
	width: 15px;
	height:15px;
	background-color: gray;
	float: left; 
	border-radius: 100%;
	margin: 1%;
	position:relative;
}
.dotOn{background-color: blue;}
.container,#container{
	width: 40%; 
	position: relative;
	margin: 50px 30%;
}
#container::after,.dotOff ::after{
	content:'';
	display:block;
	padding-top:100%;
}
.carousel > * {   
	/* opacity:0.8;    */
	background-color: radial-gradient(rgb(240, 240, 240), rgb(190, 190, 190));
	text-align: center;
	width:90%;
	height:90%;
	left:5%; 
	top:5%;  
	border-radius: 	0 25px 25px 25px;
	box-shadow:		1px 1px 1px 1px #999;
}
.threeD{
	-webkit-perspective: 800px;
			perspective: 800px;
}
.twoD{
	border: 1px solid;
	overflow: hidden;
}
.twoD >*>*{
	width:100%;
	height:100%;
	left:0; 
	top:0; 
	border-radius: 	0;	
}