carlbennettnz/index.html

## index.html
<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">

  <title>Kushagra Agarwal's HTML5 Canvas Particles Web Matrix &middot; CodePen</title>
  <!--
    Copyright (c) 2012 Christopher Stumph, http://codepen.io/cstumph

    Permission is hereby granted, free of charge, to any person obtaining
    a copy of this software and associated documentation files (the
    "Software"), to deal in the Software without restriction, including
    without limitation the rights to use, copy, modify, merge, publish,
    distribute, sublicense, and/or sell copies of the Software, and to
    permit persons to whom the Software is furnished to do so, subject to
    the following conditions:

    The above copyright notice and this permission notice shall be
    included in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
    LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
    OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  -->

  <style>
body {
	padding: 0;
	margin: 0;
	overflow: hidden;
}
  </style>

  <style>
    #codepen-footer, #codepen-footer * {
      -webkit-box-sizing: border-box !important;
      -moz-box-sizing: border-box !important;
      box-sizing: border-box !important;
    }
    #codepen-footer {
      display: block !important;
      position: fixed !important;
      bottom: 0 !important;
      left: 0 !important;
      width: 100% !important;
      padding: 0 10px !important;
      margin: 0 !important;
      height: 30px !important;
      line-height: 30px !important;
      font-size: 12px !important;
      color: #eeeeee !important;
      background-color: #505050 !important;
      text-align: left !important;
      background: -webkit-linear-gradient(top, #505050, #383838) !important;
      background: -moz-linear-gradient(top, #505050, #383838) !important;
      background: -ms-linear-gradient(top, #505050, #383838) !important;
      background: -o-linear-gradient(top, #505050, #383838) !important;
      border-top: 1px solid black !important;
      border-bottom: 1px solid black !important;
      border-radius: 0 !important;
      border-image: none !important;
      box-shadow: inset 0 1px 0 #6e6e6e, 0 2px 2px rgba(0, 0, 0, 0.4) !important;
      z-index: 300 !important;
      font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, sans-serif !important;
      letter-spacing: 0 !important;
      word-spacing: 0 !important;
    }
    #codepen-footer a {
      color: #a7a7a7 !important;
      text-decoration: none !important;
    }
    #codepen-footer a:hover {
      color: white !important;
    }
  </style>
  <script>
    // Kill alerts, confirmations and prompts
    window.alert   = function(){};
    window.confirm = function(){};
    window.prompt  = function(){};
    window.open    = function(){};
    window.print   = function(){};
  </script>

</head>
<body>

  <canvas id="canvas"></canvas>

  <script>
(function() {

//Code by: Kushagra Agarwal
//http://cssdeck.com/item/602/html5-canvas-particles-web-matrix

// RequestAnimFrame: a browser API for getting smooth animations
window.requestAnimFrame = (function(){
  return  window.requestAnimationFrame       ||
		  window.webkitRequestAnimationFrame ||
		  window.mozRequestAnimationFrame    ||
		  window.oRequestAnimationFrame      ||
		  window.msRequestAnimationFrame     ||
		  function( callback ){
			window.setTimeout(callback, 1000 / 60);
		  };
})();

// Initializing the canvas
// I am using native JS here, but you can use jQuery,
// Mootools or anything you want
var canvas = document.getElementById("canvas");

// Initialize the context of the canvas
var ctx = canvas.getContext("2d");

// Set the canvas width and height to occupy full window
var W = window.innerWidth, H = window.innerHeight;
canvas.width = W;
canvas.height = H;

// Some variables for later use
var particleCount = 100,
	particles = [],
	minDist = 70,
	dist;

// Function to paint the canvas black
function paintCanvas() {
	// Set the fill color to black
	ctx.fillStyle = "rgba(0,0,0,1)";

	// This will create a rectangle of white color from the
	// top left (0,0) to the bottom right corner (W,H)
	ctx.fillRect(0,0,W,H);
}

// Now the idea is to create some particles that will attract
// each other when they come close. We will set a minimum
// distance for it and also draw a line when they come
// close to each other.

// The attraction can be done by increasing their velocity as
// they reach closer to each other

// Let's make a function that will act as a class for
// our particles.

function Particle() {
	// Position them randomly on the canvas
	// Math.random() generates a random value between 0
	// and 1 so we will need to multiply that with the
	// canvas width and height.
	this.x = Math.random() * W;
	this.y = Math.random() * H;

	// We would also need some velocity for the particles
	// so that they can move freely across the space
	this.vx = -1 + Math.random() * 2;
	this.vy = -1 + Math.random() * 2;

	// Now the radius of the particles. I want all of
	// them to be equal in size so no Math.random() here..
	this.radius = 4;

	// This is the method that will draw the Particle on the
	// canvas. It is using the basic fillStyle, then we start
	// the path and after we use the `arc` function to
	// draw our circle. The `arc` function accepts four
	// parameters in which first two depicts the position
	// of the center point of our arc as x and y coordinates.
	// The third value is for radius, then start angle,
	// end angle and finally a boolean value which decides
	// whether the arc is to be drawn in counter clockwise or
	// in a clockwise direction. False for clockwise.
	this.draw = function() {
		ctx.fillStyle = "white";
		ctx.beginPath();
		ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2, false);

		// Fill the color to the arc that we just created
		ctx.fill();
	}
}

// Time to push the particles into an array
for(var i = 0; i < particleCount; i++) {
	particles.push(new Particle());
}

// Function to draw everything on the canvas that we'll use when
// animating the whole scene.
function draw() {

	// Call the paintCanvas function here so that our canvas
	// will get re-painted in each next frame
	paintCanvas();

	// Call the function that will draw the balls using a loop
	for (var i = 0; i < particles.length; i++) {
		p = particles[i];
		p.draw();
	}

	//Finally call the update function
	update();
}

// Give every particle some life
function update() {

	// In this function, we are first going to update every
	// particle's position according to their velocities
	for (var i = 0; i < particles.length; i++) {
		p = particles[i];

		// Change the velocities
		p.x += p.vx;
		p.y += p.vy

		// We don't want to make the particles leave the
		// area, so just change their position when they
		// touch the walls of the window
		if(p.x + p.radius > W)
			p.x = p.radius;

		else if(p.x - p.radius < 0) {
			p.x = W - p.radius;
		}

		if(p.y + p.radius > H)
			p.y = p.radius;

		else if(p.y - p.radius < 0) {
			p.y = H - p.radius;
		}

		// Now we need to make them attract each other
		// so first, we'll check the distance between
		// them and compare it to the minDist we have
		// already set

		// We will need another loop so that each
		// particle can be compared to every other particle
		// except itself
		for(var j = i + 1; j < particles.length; j++) {
			p2 = particles[j];
			distance(p, p2);
		}

	}
}

// Distance calculator between two particles
function distance(p1, p2) {
	var dist,
		dx = p1.x - p2.x;
		dy = p1.y - p2.y;

	dist = Math.sqrt(dx*dx + dy*dy);

	// Draw the line when distance is smaller
	// then the minimum distance
	if(dist <= minDist) {

		// Draw the line
		ctx.beginPath();
		ctx.strokeStyle = "rgba(255,255,255,"+ (1.2-dist/minDist) +")";
		ctx.moveTo(p.x, p.y);
		ctx.lineTo(p2.x, p2.y);
		ctx.stroke();

		// Some acceleration for the partcles
		// depending upon their distance
		var ax = dx/2000,
			ay = dy/2000;

		// Apply the acceleration on the particles
		p1.vx -= ax;
		p1.vy -= ay;

		p2.vx += ax;
		p2.vy += ay;
	}
}

// Start the main animation loop using requestAnimFrame
function animloop() {
	draw();
	requestAnimFrame(animloop);
}

animloop();

})();
  </script>

  <div id="codepen-footer">
    <a style="color: #f73535 !important;" href="https://codepen.wufoo.com/forms/m7x3r3/def/field14=" onclick="window.open(this.href,  null, 'height=517, width=680, toolbar=0, location=0, status=1, scrollbars=1, resizable=1'); return false">Report Abuse</a>

    &nbsp;

    <a href="/cstumph/pen/3/1">Edit this Pen</a>
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</body>

</html>

## index.js
//Code by: Kushagra Agarwal
//http://cssdeck.com/item/602/html5-canvas-particles-web-matrix


// RequestAnimFrame: a browser API for getting smooth animations
window.requestAnimFrame = (function(){
  return  window.requestAnimationFrame       ||
		  window.webkitRequestAnimationFrame ||
		  window.mozRequestAnimationFrame    ||
		  window.oRequestAnimationFrame      ||
		  window.msRequestAnimationFrame     ||
		  function( callback ){
			window.setTimeout(callback, 1000 / 60);
		  };
})();

// Initializing the canvas
// I am using native JS here, but you can use jQuery,
// Mootools or anything you want
var canvas = document.getElementById("canvas");

// Initialize the context of the canvas
var ctx = canvas.getContext("2d");

// Set the canvas width and height to occupy full window
var W = window.innerWidth, H = window.innerHeight;
canvas.width = W;
canvas.height = H;

// Some variables for later use
var particleCount = 100,
	particles = [],
	minDist = 70,
	dist;

// Function to paint the canvas black
function paintCanvas() {
	// Set the fill color to black
	ctx.fillStyle = "rgba(0,0,0,1)";

	// This will create a rectangle of white color from the
	// top left (0,0) to the bottom right corner (W,H)
	ctx.fillRect(0,0,W,H);
}

// Now the idea is to create some particles that will attract
// each other when they come close. We will set a minimum
// distance for it and also draw a line when they come
// close to each other.

// The attraction can be done by increasing their velocity as
// they reach closer to each other

// Let's make a function that will act as a class for
// our particles.

function Particle() {
	// Position them randomly on the canvas
	// Math.random() generates a random value between 0
	// and 1 so we will need to multiply that with the
	// canvas width and height.
	this.x = Math.random() * W;
	this.y = Math.random() * H;


	// We would also need some velocity for the particles
	// so that they can move freely across the space
	this.vx = -1 + Math.random() * 2;
	this.vy = -1 + Math.random() * 2;

	// Now the radius of the particles. I want all of
	// them to be equal in size so no Math.random() here..
	this.radius = 4;

	// This is the method that will draw the Particle on the
	// canvas. It is using the basic fillStyle, then we start
	// the path and after we use the `arc` function to
	// draw our circle. The `arc` function accepts four
	// parameters in which first two depicts the position
	// of the center point of our arc as x and y coordinates.
	// The third value is for radius, then start angle,
	// end angle and finally a boolean value which decides
	// whether the arc is to be drawn in counter clockwise or
	// in a clockwise direction. False for clockwise.
	this.draw = function() {
		ctx.fillStyle = "white";
		ctx.beginPath();
		ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2, false);

		// Fill the color to the arc that we just created
		ctx.fill();
	}
}

// Time to push the particles into an array
for(var i = 0; i < particleCount; i++) {
	particles.push(new Particle());
}

// Function to draw everything on the canvas that we'll use when
// animating the whole scene.
function draw() {

	// Call the paintCanvas function here so that our canvas
	// will get re-painted in each next frame
	paintCanvas();

	// Call the function that will draw the balls using a loop
	for (var i = 0; i < particles.length; i++) {
		p = particles[i];
		p.draw();
	}

	//Finally call the update function
	update();
}

// Give every particle some life
function update() {

	// In this function, we are first going to update every
	// particle's position according to their velocities
	for (var i = 0; i < particles.length; i++) {
		p = particles[i];

		// Change the velocities
		p.x += p.vx;
		p.y += p.vy

		// We don't want to make the particles leave the
		// area, so just change their position when they
		// touch the walls of the window
		if(p.x + p.radius > W)
			p.x = p.radius;

		else if(p.x - p.radius < 0) {
			p.x = W - p.radius;
		}

		if(p.y + p.radius > H)
			p.y = p.radius;

		else if(p.y - p.radius < 0) {
			p.y = H - p.radius;
		}

		// Now we need to make them attract each other
		// so first, we'll check the distance between
		// them and compare it to the minDist we have
		// already set

		// We will need another loop so that each
		// particle can be compared to every other particle
		// except itself
		for(var j = i + 1; j < particles.length; j++) {
			p2 = particles[j];
			distance(p, p2);
		}

	}
}

// Distance calculator between two particles
function distance(p1, p2) {
	var dist,
		dx = p1.x - p2.x;
		dy = p1.y - p2.y;

	dist = Math.sqrt(dx*dx + dy*dy);

	// Draw the line when distance is smaller
	// then the minimum distance
	if(dist <= minDist) {

		// Draw the line
		ctx.beginPath();
		ctx.strokeStyle = "rgba(255,255,255,"+ (1.2-dist/minDist) +")";
		ctx.moveTo(p.x, p.y);
		ctx.lineTo(p2.x, p2.y);
		ctx.stroke();

		// Some acceleration for the partcles
		// depending upon their distance
		var ax = dx/2000,
			ay = dy/2000;

		// Apply the acceleration on the particles
		p1.vx -= ax;
		p1.vy -= ay;

		p2.vx += ax;
		p2.vy += ay;
	}
}

// Start the main animation loop using requestAnimFrame
function animloop() {
	draw();
	requestAnimFrame(animloop);
}

animloop();

## markup.html

<canvas id="canvas"></canvas>

## style.css
body {
	padding: 0;
	margin: 0;
	overflow: hidden;
}
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8">

	<title>Kushagra Agarwal's HTML5 Canvas Particles Web Matrix · CodePen</title>
	<!--
	Copyright (c) 2012 Christopher Stumph, http://codepen.io/cstumph

	Permission is hereby granted, free of charge, to any person obtaining
	a copy of this software and associated documentation files (the
	"Software"), to deal in the Software without restriction, including
	without limitation the rights to use, copy, modify, merge, publish,
	distribute, sublicense, and/or sell copies of the Software, and to
	permit persons to whom the Software is furnished to do so, subject to
	the following conditions:

	The above copyright notice and this permission notice shall be
	included in all copies or substantial portions of the Software.

	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
	LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
	OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
	WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	-->

	<style>
	body {
	padding: 0;
	margin: 0;
	overflow: hidden;
	}
	</style>

	<style>
	#codepen-footer, #codepen-footer * {
	-webkit-box-sizing: border-box !important;
	-moz-box-sizing: border-box !important;
	box-sizing: border-box !important;
	}
	#codepen-footer {
	display: block !important;
	position: fixed !important;
	bottom: 0 !important;
	left: 0 !important;
	width: 100% !important;
	padding: 0 10px !important;
	margin: 0 !important;
	height: 30px !important;
	line-height: 30px !important;
	font-size: 12px !important;
	color: #eeeeee !important;
	background-color: #505050 !important;
	text-align: left !important;
	background: -webkit-linear-gradient(top, #505050, #383838) !important;
	background: -moz-linear-gradient(top, #505050, #383838) !important;
	background: -ms-linear-gradient(top, #505050, #383838) !important;
	background: -o-linear-gradient(top, #505050, #383838) !important;
	border-top: 1px solid black !important;
	border-bottom: 1px solid black !important;
	border-radius: 0 !important;
	border-image: none !important;
	box-shadow: inset 0 1px 0 #6e6e6e, 0 2px 2px rgba(0, 0, 0, 0.4) !important;
	z-index: 300 !important;
	font-family: "Lucida Grande", "Lucida Sans Unicode", Tahoma, sans-serif !important;
	letter-spacing: 0 !important;
	word-spacing: 0 !important;
	}
	#codepen-footer a {
	color: #a7a7a7 !important;
	text-decoration: none !important;
	}
	#codepen-footer a:hover {
	color: white !important;
	}
	</style>
	<script>
	// Kill alerts, confirmations and prompts
	window.alert = function(){};
	window.confirm = function(){};
	window.prompt = function(){};
	window.open = function(){};
	window.print = function(){};
	</script>

	</head>
	<body>

	<canvas id="canvas"></canvas>

	<script>
	(function() {

	//Code by: Kushagra Agarwal
	//http://cssdeck.com/item/602/html5-canvas-particles-web-matrix

	// RequestAnimFrame: a browser API for getting smooth animations
	window.requestAnimFrame = (function(){
	return window.requestAnimationFrame \|\|
	window.webkitRequestAnimationFrame \|\|
	window.mozRequestAnimationFrame \|\|
	window.oRequestAnimationFrame \|\|
	window.msRequestAnimationFrame \|\|
	function( callback ){
	window.setTimeout(callback, 1000 / 60);
	};
	})();

	// Initializing the canvas
	// I am using native JS here, but you can use jQuery,
	// Mootools or anything you want
	var canvas = document.getElementById("canvas");

	// Initialize the context of the canvas
	var ctx = canvas.getContext("2d");

	// Set the canvas width and height to occupy full window
	var W = window.innerWidth, H = window.innerHeight;
	canvas.width = W;
	canvas.height = H;

	// Some variables for later use
	var particleCount = 100,
	particles = [],
	minDist = 70,
	dist;

	// Function to paint the canvas black
	function paintCanvas() {
	// Set the fill color to black
	ctx.fillStyle = "rgba(0,0,0,1)";

	// This will create a rectangle of white color from the
	// top left (0,0) to the bottom right corner (W,H)
	ctx.fillRect(0,0,W,H);
	}

	// Now the idea is to create some particles that will attract
	// each other when they come close. We will set a minimum
	// distance for it and also draw a line when they come
	// close to each other.

	// The attraction can be done by increasing their velocity as
	// they reach closer to each other

	// Let's make a function that will act as a class for
	// our particles.

	function Particle() {
	// Position them randomly on the canvas
	// Math.random() generates a random value between 0
	// and 1 so we will need to multiply that with the
	// canvas width and height.
	this.x = Math.random() * W;
	this.y = Math.random() * H;

	// We would also need some velocity for the particles
	// so that they can move freely across the space
	this.vx = -1 + Math.random() * 2;
	this.vy = -1 + Math.random() * 2;

	// Now the radius of the particles. I want all of
	// them to be equal in size so no Math.random() here..
	this.radius = 4;

	// This is the method that will draw the Particle on the
	// canvas. It is using the basic fillStyle, then we start
	// the path and after we use the `arc` function to
	// draw our circle. The `arc` function accepts four
	// parameters in which first two depicts the position
	// of the center point of our arc as x and y coordinates.
	// The third value is for radius, then start angle,
	// end angle and finally a boolean value which decides
	// whether the arc is to be drawn in counter clockwise or
	// in a clockwise direction. False for clockwise.
	this.draw = function() {
	ctx.fillStyle = "white";
	ctx.beginPath();
	ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2, false);

	// Fill the color to the arc that we just created
	ctx.fill();
	}
	}

	// Time to push the particles into an array
	for(var i = 0; i < particleCount; i++) {
	particles.push(new Particle());
	}

	// Function to draw everything on the canvas that we'll use when
	// animating the whole scene.
	function draw() {

	// Call the paintCanvas function here so that our canvas
	// will get re-painted in each next frame
	paintCanvas();

	// Call the function that will draw the balls using a loop
	for (var i = 0; i < particles.length; i++) {
	p = particles[i];
	p.draw();
	}

	//Finally call the update function
	update();
	}

	// Give every particle some life
	function update() {

	// In this function, we are first going to update every
	// particle's position according to their velocities
	for (var i = 0; i < particles.length; i++) {
	p = particles[i];

	// Change the velocities
	p.x += p.vx;
	p.y += p.vy

	// We don't want to make the particles leave the
	// area, so just change their position when they
	// touch the walls of the window
	if(p.x + p.radius > W)
	p.x = p.radius;

	else if(p.x - p.radius < 0) {
	p.x = W - p.radius;
	}

	if(p.y + p.radius > H)
	p.y = p.radius;

	else if(p.y - p.radius < 0) {
	p.y = H - p.radius;
	}

	// Now we need to make them attract each other
	// so first, we'll check the distance between
	// them and compare it to the minDist we have
	// already set

	// We will need another loop so that each
	// particle can be compared to every other particle
	// except itself
	for(var j = i + 1; j < particles.length; j++) {
	p2 = particles[j];
	distance(p, p2);
	}

	}
	}

	// Distance calculator between two particles
	function distance(p1, p2) {
	var dist,
	dx = p1.x - p2.x;
	dy = p1.y - p2.y;

	dist = Math.sqrt(dxdx + dydy);

	// Draw the line when distance is smaller
	// then the minimum distance
	if(dist <= minDist) {

	// Draw the line
	ctx.beginPath();
	ctx.strokeStyle = "rgba(255,255,255,"+ (1.2-dist/minDist) +")";
	ctx.moveTo(p.x, p.y);
	ctx.lineTo(p2.x, p2.y);
	ctx.stroke();

	// Some acceleration for the partcles
	// depending upon their distance
	var ax = dx/2000,
	ay = dy/2000;

	// Apply the acceleration on the particles
	p1.vx -= ax;
	p1.vy -= ay;

	p2.vx += ax;
	p2.vy += ay;
	}
	}

	// Start the main animation loop using requestAnimFrame
	function animloop() {
	draw();
	requestAnimFrame(animloop);
	}

	animloop();

	})();
	</script>

	<div id="codepen-footer">
	<a style="color: #f73535 !important;" href="https://codepen.wufoo.com/forms/m7x3r3/def/field14=" onclick="window.open(this.href, null, 'height=517, width=680, toolbar=0, location=0, status=1, scrollbars=1, resizable=1'); return false">Report Abuse</a>



	<a href="/cstumph/pen/3/1">Edit this Pen</a>
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