November 2011
Intermediate to advanced
348 pages
7h 2m
English
Content preview from HTML5 Canvas Cookbook
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Creating acceleration
Now that we have a handle on the basics of animation, let's try something a little bit more complex by accelerating a box downwards due to the force of gravity.
How to do it...
Follow these steps to draw a box at the top of the canvas which falls downward due to the force of gravity:
- 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(); - Define gravity and create a
boxobject that contains the box's position, x and ...
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