November 2011
Intermediate to advanced
348 pages
7h 2m
English
Content preview from HTML5 Canvas Cookbook
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Animating a clock
For those of you who slip into a trance when you're developing cool projects, where time seems to melt away, this one's for you. In this recipe, we'll create a nifty animated clock to remind us of the real-world time outside of cyber space.
How to do it...
Follow these steps to animate the hour, minute, and second hands on a clock:
- Link to the
Animationclass:<head> <script src="animation.js"> </script> - Instantiate an
Animationobject, get the canvas context, and define the clock radius:<script> window.onload = function(){ var anim = new Animation("myCanvas"); var canvas = anim.getCanvas(); var context = anim.getContext(); var clockRadius ...
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