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 – hitting the ball with the paddles
We will use an approach, similar to that of checking the boundary, to check the collision:
- Open the
js/pingpong.jsfile that we used in the previous section. - In the
moveBallfunction, we have already reserved the place to put the collision detection code there. Find the line with//checkpaddleshere. - Let's put the following code there. The code checks whether the ball is overlapping with either paddle and bounces the ball away when they overlap:
// Variables for checking paddles var ballX = ball.x + ball.speed * ball.directionX; var ballY = ball.y + ball.speed * ball.directionY; // check moving paddle here, later. // check left paddle if (ballX >= pingpong.paddleA.x && ballX < pingpong.paddleA.x ...
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