June 2015
Beginner
354 pages
8h 23m
English
Content preview from HTML5 Game Development by Example(Second Edition)Become 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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Time for action – adding force to the car
Carry out the following steps to take the keyboard input:
- Open the
box2dcargame.jsJavaScript file in a text editor. - In the page loaded event handler, we add the following
keydownevent handler at the beginning of the code. This listens to the right arrow key and the left arrow key to apply force in different directions:$(document).keydown(function(e){ switch(e.keyCode) { case 39: // right arrow key to apply force towards right var force = new b2Vec2(100, 0); carGame.car.ApplyForce(force, carGame.car.GetWorldCenter()); return false; break; case 37: // left arrow key to apply force towards left var force = new b2Vec2(-100, 0); carGame.car.ApplyForce(force, carGame.car.GetWorldCenter()); return false; break; ...
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