November 2011
Intermediate to advanced
348 pages
7h 2m
English
Content preview from HTML5 Canvas Cookbook
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Creating a custom transform
If you're looking to perform a custom transformation other than a translation, scale, or rotation, the HTML5 canvas API also provides a method which allows us to define a custom transformation matrix that can be applied to the current context. In this recipe, we'll manually create a translational transform to demonstrate how the transform() method works.
How to do it...
Follow these steps to perform a custom transform:
- Define the canvas context and the dimensions for our rectangle:
window.onload = function(){ var canvas = document.getElementById("myCanvas"); var context = canvas.getContext("2d"); var rectWidth = 150; var ...
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