November 2011
Intermediate to advanced
348 pages
7h 2m
English
Content preview from HTML5 Canvas Cookbook
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Creating oscillation
In this recipe, we'll explore the third major type of motion—oscillation. Some good examples of oscillations are a bouncing weight attached to a spring, an oscillating bubble, or a pendulum that swings back and forth.
How to do it...
Follow these steps to oscillate a box back and forth:
- Link to the
Animationclass:<head> <script src="animation.js"> </script> - Instantiate an
Animationobject and get the canvas context:<script> window.onload = function(){ var anim = new Animation("myCanvas"); var canvas = anim.getCanvas(); var context = anim.getContext(); - Create a
boxobject that contains the box's position and size:var box = {
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