Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Android Game Programming By Example

You're reading from   Android Game Programming By Example Harness the power of the Android SDK by building three immersive and captivating games

Arrow left icon
Product type Paperback
Published in Jun 2015
Publisher
ISBN-13 9781785280122
Length 388 pages
Edition 1st Edition
Languages
Tools
Arrow right icon
Author (1):
Arrow left icon
John Horton John Horton
Author Profile Icon John Horton
John Horton
Arrow right icon
View More author details
Toc

Table of Contents (13) Chapters Close

Preface 1. Player 1 UP FREE CHAPTER 2. Tappy Defender – First Step 3. Tappy Defender – Taking Flight 4. Tappy Defender – Going Home 5. Platformer – Upgrading the Game Engine 6. Platformer – Bob, Beeps, and Bumps 7. Platformer – Guns, Life, Money, and the Enemy 8. Platformer – Putting It All Together 9. Asteroids at 60 FPS with OpenGL ES 2 10. Move and Draw with OpenGL ES 2 11. Things That Go Bump – Part II Index

Precise collision detection with an asteroid


We did this last because there is a more complicated final step. As in the border detection, we will need to translate and rotate our object's vertices. However this time, we will need to do it for two objects.

Furthermore, once we rotated and translated the asteroid's vertices, we will need to handle them in pairs of vertices that form a line. These are lines that we will test against each and every vertex from the other object. This test is of course our crossing number method that we discussed.

We need to do all of this within the body of the if (distance < cp1.radius + cp2.radius) { ...}, where we previously just set the collided Boolean to true.

There is quite a lot of code, so we will split it into chunks and see what is going on at each stage. Also, the code indentation will not always be consistent from block to block in order to format it in the most readable way possible.

The next few blocks of code are the entire contents of the aforementioned...

lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime
Banner background image