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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

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Product type Paperback
Published in Jun 2015
Publisher
ISBN-13 9781785280122
Length 388 pages
Edition 1st Edition
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Author (1):
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John Horton John Horton
Author Profile Icon John Horton
John Horton
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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

Drawing a static game border


In this simple class, we define four sets of points that will represent four lines. Unsurprisingly, the GameObject class will draw the border using these points as the end points of lines.

In the constructor, which is the entirety of the class, we set the type by calling setType(), the world location as the center of the map, and height and width as the height and width of the entire map.

Then, we define the four lines in a float array and call setVertices() to prepare a FloatBuffer.

Create a new class called Border and add the following code:

public class Border extends GameObject{

  public Border(float mapWidth, float mapHeight){

        setType(Type.BORDER);
        //border center is the exact center of map
        setWorldLocation(mapWidth/2,mapHeight/2);

        float w = mapWidth;
        float h = mapHeight;
        setSize(w, h);

       // The vertices of the border represent four lines
       // that create a border of a size passed into the constructor...
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