Book Image

Canvas Cookbook

Book Image

Canvas Cookbook

Overview of this book

With the growing popularity of HTML5 Canvas, this book offers tailored recipes to help you develop portable applications, presentations, and games. The recipes are simple yet creative and build on each other. At every step, the book inspires the reader to develop his/her own recipe. From basic to advanced, every aspect of Canvas API has been covered to guide readers to develop their own application, presentation, or game.
Table of Contents (16 chapters)
Canvas Cookbook
About the Author
About the Reviewer

Animating particles

This is one of the most important topics in animation, as all kinds of actions are taken care of using these tiny things called particles. Particles can move randomly, accelerate, fall due to gravity, collide, and so on. A few of these effects are covered in this chapter.

This recipe is a very basic recipe to clarify how to create and animate particles. The output of this recipe looks like this:

How to do it…

The recipe is shown here:

The HTML code:

<title>Particle demo</title>
<script src="particledemo.js"></script>
<body onload="init();">
<canvas id="MyCanvasArea" width="800" height="500" style="border:2px solid blue;" >
   your browser does not support canvas
<h1>Particle Demo</h1>

The JavaScript code:

var can;
var ctx;
var particles=[];
var particle;
var part;
var numParticles=100;
var i;
var bounce=-1;
var r,g...