Canvas Cookbook

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.

Canvas Cookbook

Credits

About the Author

About the Reviewer

www.PacktPub.com

Preface

Free Chapter

Paths and Text

Introduction

Drawing lines

Drawing horizontal, vertical, and assorted lines

Drawing joins

Drawing arc1

Drawing arc2

Drawing a quadratic curve

Drawing a rainbow

Drawing a Bezier curve

Drawing a flag

Drawing text

Drawing 3D text with shadows

Adding shadows to objects

Drawing a house

Shapes and Composites

Working with custom shapes and styles

Demonstrating translation, rotation, and scaling

Drawing an ellipse

Saving and restoring canvas state

Demonstrating composites

Drawing a mouse

Animation

Introduction

Creating an animation class

Demonstrating acceleration

Demonstrating gravity

Animating a line

Animating text

Animating a clock

Animating a solar system

Animating particles

Animating a particle fountain

Animating a rain effect

Animating a snow effect

Images and Videos

Introduction

Drawing and cropping an image

Rendering effects to images

Drawing a mirror image

Clipping a path

Animated clipping

Converting canvas to image and back to canvas

Working with videos

Rendering effects to videos

Creating a pixelated image focus

Interactivity through Events

Introduction

Working with mouse coordinates

Making a face smile

Detecting a point in a path

Simulating car movements

Dragging and dropping

Combining events and animation

Demonstrating a touch event

Creating Graphs and Charts

Introduction

Drawing the axes

Drawing a simple equation

Drawing a sinusoidal wave

3D Modeling

Drawing a 3D cylinder and a cone

Drawing a 3D sphere and a torus

Drawing 3D text decorated by particles

Drawing a panorama

Drawing a snowman

Game Development

Introduction

Understanding the gaming states

Drawing on canvas

Playing some music

Using sprites from the sprite sheet

Demonstrating animation

Demonstrating collision

Demonstrating physics

Game 1 – Fruit Basket

Game 2 – Catapult

Interoperability and Deployment

Introduction

Understanding interoperability

Styling text and background using CSS

Deploying a game on Android mobile

Index

Customer Reviews

5 star

4 star

3 star

2 star

1 star

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:

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

The JavaScript code:

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

Canvas Cookbook

Canvas Cookbook

Overview of this book

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