November 2011
Intermediate to advanced
384 pages
13h 23m
English
Content preview from HTML5: Your visual blueprint™ for designing rich web pages and applicationsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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TRANSLATE THE X- AND Y-AXES
The origin, the name for the point at (0, 0), is in the top-left corner of the canvas element. Whereas this works well enough if you are just starting out drawing on the canvas — increase x to go right, increase y to go down — it does make things a little more difficult to understand if you have multiple objects to draw together as a group, especially if that group is positioned at multiple relative locations on the canvas.
In fact, this will become a major problem when you start working with canvas animations. Imagine that you have a group of shapes that make up a character in a game, and the character moves from right to left on the screen. You could calculate the absolute x and y coordinates for all points to build ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.