October 2010
Beginner
373 pages
7h 28m
English
Content preview from The Essential Guide to HTML5: Using Games to Learn HTML5 and JavaScript
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Chapter 3. Bouncing Ball
creating programmer-defined objects
using setInterval for animation
drawing images
form input and validating form input
for loops
drawing with gradients
Introduction
Animation, whether at the movies, using a flipbook, or generated by computer, involves displaying a sequence of still images fast enough so that we interpret what we see as movement, as life. In this chapter, I'll show you how to produce animated scenes by simulating a ball bouncing in a 2-dimensional box, with horizontal and vertical speeds that can by changed by a player. The first iteration of our program calculates new positions for the ball at fixed intervals ...
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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.