Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

JavaScript

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Behavior

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                
              
            
!

CSS

              
                html {
	overflow: hidden;
	touch-action: none;
	content-zooming: none;
}
body {
	position: absolute;
	margin: 0;
	padding: 0;
	width: 100%;
	height: 100%;
	background: #000;
}
canvas {
	position:absolute;
	width:100%;
	height:100%;
	background: #000;
}
              
            
!

JS

              
                ~ function() {

	'use strict';

	var setup = {
		/* ----- setup ----- */
		zoomMin: 1.5,
		zoomMax: 6,
		spring: 0.025,
		friction: 0.95,
		aspectRatio: 1.618,
		intensity: 255,
		color: [0,0.5,1],
		ngrid: 6,
		base: 'https://s3-us-west-2.amazonaws.com/s.cdpn.io/222599/',
		content: [
			{x:2, y:0, img:'ct33.jpg'},
			{x:2, y:2, img:'ct23.jpg'},
			{x:4, y:1, img:'ci38.jpg'},
			{x:1, y:4, img:'ct11.jpg'},
			{x:3, y:4, img:'df17.jpg'},
			{x:0, y:2, img:'ct07.jpg'},
			{x:0, y:0, img:'ct14.jpg'},
			{x:5, y:5, img:'ct35.jpg'},
			{x:5, y:3, img:'ct05.jpg'},
			{x:1, y:1, w:400, h:400, canvas: function (ctx) {
				ctx.fillStyle = '#fff';
				ctx.font = 'bold 400px sans-serif';
				ctx.textAlign = 'center';
				ctx.textBaseline = 'bottom';
				ctx.fillText('?', 200, 420);
			}},
			{x:2, y:1, w:400, h:400, canvas: function (ctx) {
				ctx.fillStyle = '#fff';
				ctx.font = 'bold 100px sans-serif';
				ctx.textAlign = 'center';
				ctx.textBaseline = 'bottom';
				ctx.fillText('R+R-R', 200, 250);
			}}
		]
	};

	var points, planes, over, overZoomed, size, radius;
	var force    = -setup.zoomMin;
	var ngrid    =  setup.ngrid;
	var npoints  = (ngrid + 1) * (ngrid + 1);
	var nplanes  = ngrid * ngrid;

	// ---- main loop ----
	function run() {

		requestAnimationFrame(run);
		// ---- clear screen ----
		ctx.clearRect(0, 0, canvas.width, canvas.height);
		// ---- zoom out ----
		if (over !== overZoomed) force = -setup.zoomMin;
		// ---- update points ----
		for (var i = 0; i < npoints; i++) {
			points[i].update();
		}
		// ---- update grid ----
		for (var i = 0; i < nplanes; i++) {
			planes[i].update();
		}
		// ---- zIndex sorting ----
		planes.sort(function (p0, p1) {
			return p1.zIndex - p0.zIndex;
		});
		// ---- draw grid ----
		for (var i = 0; i < nplanes; i++) {
			planes[i].draw();
		}
		// ---- tap ----
		if (pointer.isDown) {
			click();
			pointer.isDown = false;
		}
	
	}

		// ==== Points constructor ====
	var Points = function (x, y) {
		this.x  = Math.round((0.5 * (canvas.width - (size * ngrid * setup.aspectRatio))) + x * setup.aspectRatio);
		this.y  = Math.round(0.5 * (canvas.height - (size * ngrid)) + y);
		this.X  = this.x;
		this.Y  = this.y;
		this.vx = 0;
		this.vy = 0;
		this.d  = 0;
	};

	// ==== points Math ====
	Points.prototype.update = function () {
		var z, a, x, y,
			dx = pointer.x - this.x,
			dy = pointer.y - this.y;
		this.d = Math.sqrt(dx * dx + dy * dy);
		if (this.d < radius) {
			z = this.d * force * (radius - this.d) / radius;
			a = Math.atan2(dy, dx);
			x = this.x + Math.cos(a) * z;
			y = this.y + Math.sin(a) * z;
		} else {
			x = this.x;
			y = this.y;
		}
		this.vx = (this.vx + (x - this.X) * setup.spring) * setup.friction;
		this.vy = (this.vy + (y - this.Y) * setup.spring) * setup.friction;
		this.X += this.vx;
		this.Y += this.vy;
	};
	// ==== Planes constructor ====
	var Plane = function (p0, p1, p2, p3) {
		this.p0  = p0;
		this.p1  = p1;
		this.p2  = p2;
		this.p3  = p3;
		this.img = false;
		this.url = '';
		this.d2  = 0;
		this.isLoading = false;
		this.width  = 0;
		this.height = 0;
		
	};

	// ==== compute z-index ====
	Plane.prototype.update = function () {
		this.zIndex = Math.max(this.p0.d, this.p1.d, this.p2.d, this.p3.d);
	};

	// ==== draw triangle ====
	Plane.prototype.drawTriangle = function (p0, p1, p2, up) {
		if (this.isLoading) {
			if (this.img.complete) {
				this.isLoading = false;
				this.width  = this.img.width;
				this.height = this.img.height;
				this.d2     = -this.width * this.height;
			}
		} else {
			ctx.save();
			ctx.beginPath();
			ctx.moveTo(p0.X, p0.Y + up);
			ctx.lineTo(p1.X, p1.Y + up);
			ctx.lineTo(p2.X, p2.Y + up);
			ctx.closePath();
			// ---- clip ----
			ctx.clip();
			// ---- transformation matrix ----
			if (up > 0) {
				ctx.transform(
					(this.height * p0.X - this.height * p1.X) / this.d2, // m11
					(this.height * p0.Y - this.height * p1.Y) / this.d2, // m12
					(this.width  * p1.X - this.width  * p2.X) / this.d2, // m21
					(this.width  * p1.Y - this.width  * p2.Y) / this.d2, // m22
					 p0.X, // dx
					 p0.Y  // dy
				);
			} else {
				ctx.transform(
					(this.height * p2.X - this.height * p1.X) / this.d2, // m11
					(this.height * p2.Y - this.height * p1.Y) / this.d2, // m12
					(this.width  * p0.X - this.width  * p2.X) / this.d2, // m21
					(this.width  * p0.Y - this.width  * p2.Y) / this.d2, // m22
					 p0.X, // dx
					 p0.Y  // dy
				);
			}
			ctx.drawImage(this.img, 0, 0);
			ctx.restore();
		}
	};
	// ==== draw Plane ====
	Plane.prototype.draw = function () {
		// ---- path ----
		ctx.beginPath();
		ctx.moveTo(this.p0.X-1, this.p0.Y-1);
		ctx.lineTo(this.p1.X+1, this.p1.Y-1);
		ctx.lineTo(this.p2.X+1, this.p2.Y+1);
		ctx.lineTo(this.p3.X-1, this.p3.Y+1);
		ctx.closePath();
		// ---- fill color ----
		if (ctx.isPointInPath(pointer.x, pointer.y)) {
			// ---- on mouse over ----
			over = this;
			if (this.img) canvas.setCursor("pointer");
			else canvas.setCursor("default");
		}
		var c = setup.intensity - (this.zIndex / canvas.minSize * setup.intensity);
		ctx.fillStyle = 'rgb(' + 
			Math.round(c * setup.color[0]) + ',' + 
			Math.round(c * setup.color[1]) + ',' + 
			Math.round(c * setup.color[2]) + ')';
		ctx.fill();
		if (this.img) {
			// ---- draw image ----
			this.drawTriangle(this.p0, this.p1, this.p2,  1);
			this.drawTriangle(this.p0, this.p2, this.p3, -1);
		}
	};
	/* ==== build grid ==== */
	var creatGrid = function () {
		// ---- dimensions ----
		var s   = 0.8 * canvas.minSize;
		if (canvas.width < canvas.height) s = s / setup.aspectRatio;
		size    = s / ngrid;
		radius  = s / 3;
		// ---- create points ----
		points = [];
		for (var i = 0; i <= ngrid; i++) {
			for (var j = 0; j <= ngrid; j++) {
				points.push(
					new Points(
						size * j,
						size * i
					)
				);
			}
		}
		// ---- create grid ----
		planes = [];
		for (var i = 0; i < ngrid; i++) {
			for (var j = 0; j < ngrid; j++) {
				planes.push(
					new Plane(
						points[i + (ngrid + 1) * j],
						points[i + (ngrid + 1) * j + 1],
						points[i + (ngrid + 1) * (j + 1) + 1],
						points[i + (ngrid + 1) * (j + 1)]
					)
				);
			}
		}
		// ---- add grid content ----
		for (var i = 0; i < setup.content.length; i++) {
			var o = setup.content[i],
				p = planes[(o.y * 1) + ngrid * o.x];
			if (o.canvas) {
				// ---- dynamic canvas ----
				var cache = document.createElement('canvas');
				p.width = cache.width = o.w || 400;
				p.height = cache.height = o.h || 400;
				p.d2 = -p.width * p.height;
				var ict = cache.getContext('2d');
				o.canvas(ict);
				p.img = cache;
			} else {
				// ---- external image ----
				p.img = new Image();
				p.img.src = setup.base + o.img;
				p.isLoading = true;
			}
			p.url = o.url || false;
		}
	};

	var click = function () {
		if (force === -setup.zoomMin) {
			if (over.img) {
				// ---- zoom in ----
				force = -setup.zoomMax;
				overZoomed = over;
			}
		} else {
			// ---- zoom out ----
			force = -setup.zoomMin;
			// ---- link ----
			if (over.url) {
				document.location.href = over.url;
			}
		}
	};


	// set canvas

	var canvas = {  
		width:  0, 
		height: 0,
		elem: document.createElement('canvas'),
		resize: function () {
			var o = this.elem;
			var w = this.elem.offsetWidth * 1;
			var h = this.elem.offsetHeight * 1;
			if (w !== this.width || h !== this.height) {
				for (this.left = 0, this.top = 0; o !== null; o = o.offsetParent) {
					this.left += o.offsetLeft;
					this.top  += o.offsetTop;
				}
				this.width = this.elem.width = w;
				this.height = this.elem.height = h;
				this.centerX = w / 2;
				this.centerY = h / 2;
				this.minSize = Math.min(this.width, this.height);
				creatGrid();
			}
		},
		setCursor: function (type) {
			if (type !== this.cursor) {
				this.cursor = type;
				this.elem.style.cursor = type;
			}
		},
		init: function () {
			var ctx = this.elem.getContext('2d');
			document.body.appendChild(this.elem);
			window.addEventListener('resize', this.resize.bind(this), false);
			this.resize();
			return ctx;
		}
	};

	var ctx = canvas.init();

	// pointer

	var pointer = (function (canvas) {
		var pointer = {
			x: canvas.centerX,
			y: canvas.centerY,
			canvas: canvas,
			isDown: false,
			pointer: function (e) {
				var touchMode = e.targetTouches, pointer;
				if (touchMode) {
					e.preventDefault();
					pointer = touchMode[0];
				} else pointer = e;
				this.x = pointer.clientX - this.canvas.left;
				this.y = pointer.clientY - this.canvas.top;
			},
		};
		[[window, 'mousemove,touchmove', function (e) {
			this.pointer(e);
		}],
		[canvas.elem, 'mousedown,touchstart', function (e) {
			this.pointer(e); 
			this.isDown = true;
		}],
		[window, 'mouseup,touchend,touchcancel', function (e) {
			e.preventDefault();
			this.isDown = false;
		}]].forEach(function (e) {
			for (var i = 0, events = e[1].split(','); i < events.length; i++) {
				e[0].addEventListener(events[i], e[2].bind(pointer), false );
			}
		}.bind(pointer));
		return pointer;
	}(canvas));

	run();

} ();
              
            
!
999px

Console