Game development with_lib_gdx
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A presentation on libGDX for the GTUG at metalab.
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Game development with_lib_gdx
- 1. Game Development with By Gabriel Grill
- 2. LibGDX is ... open source cross-platform Desktop Web Smartphone performant JNI Wrapper optimised for Davlik VM well documented Wiki, Forum, Blog, JavaDoc, Demos, Videos, ..
- 3. LibGDX has ... great tooling Particle-, Body-, Fonteditor TMX and TWL support Texture packer backends for Jogl, LWJGL, Angle SoundTouch, KissFFT Mpg123, Tremor nightly builds and regular releases
- 4. Getting Started - Desktop 1. create Project 2. download and move libGDX to libs/ 3. Java Build Path gdx.jar, gdx-backend-jogl.jar and the corresponding “-natives.jar“ public class HelloWorldDesktop { public static void main(String[] argv) { new JoglApplication(new App(), "Title", width, height, false/*Gl 2.0*/); } }
- 5. Application http://libgdx.googlecode.com/svn/wiki/img/application_lifecycle_diagram.png public class App implements ApplicationListener { public void resume() { } public void resize(int width, int height) { } public void render(){ } public void pause(){ } public void dispose(){ } public void create(){ } }
- 6. Getting Started - Android 1. create Android Project 2. copy libGDX to libs/ 3. <uses-sdk minSdkVersion="3" targetSdkVersion="8"/> 4. Java Build Path gdx.jar, gdx-backend-android.jar Desktop Project public class HelloWorldAndroid extends AndroidApplication { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); initialize(new App(), false /*Gl 2.0*/); } }
- 7. Assets and Input File API Classpath, File system Asset folder data/ AssetManager Texture-, Fixture-, TileAtlas Json- and XML Processing Polling and event-based Input Remote Input, compass and accelerometer
- 8. Graphics OpenGL ES 1.0, 1.1 and 2.0 Shaders, Framebuffer Objects, Mipmaps Batched and cached sprite rendering Particle System, TMX tile map rendering 2D scene graph with tweening framework OBJ and MD5 model loaders soon FBX/Collada Key-frame and skeletal animation Ortographic and perspective camera
- 9. Miscellaneous Custom Collections, Sorting Preferences Vector, Matrix and Quaternion classes JNI wrapper of box2d Shapes, intersection and overlap testing Vibrator support WAV, MP3 and OGG support Playback and recording AdWhirl, Admob GDX-JNIGEN
- 10. Performance renders a scene of 32 32 pixel sprites in a grid - 336 sprites AndEngine: Hero: ~17fps Nexus One: ~41fps Libgdx: Hero: ~51fps Nexus One: ~51fps Android 1.5 - Hero: FloatBuffer.put( float value ): 40.774 secs FloatBuffer.put(int index, float value): 42.710 secs FloatBuffer.put( float[] values ): 41.109 sec IntBuffer.put( int[] values): 12.59 secs JNI -> BufferUtils.copy(): 0.14 secs Android 2.2 - Nexus One: FloatBuffer.put( float value ): 6.876 secs FloatBuffer.put(int index, float value): 7.006 secs FloatBuffer.put( float[] values ): 6.800 sec IntBuffer.put( int[] values): 1.479 secs JNI -> BufferUtils.copy(): 0.067 secs
- 11. Demos Now let‘s see some Code
- 12. Sources http://code.google.com/p/libgdx/wiki/ http://code.google.com/p/libgdx-users/wiki/ http://libgdx.badlogicgames.com/nightlies/docs/api/ http://www.badlogicgames.com/wordpress/ http://www.badlogicgames.com/wordpress/?p=816 http://www.badlogicgames.com/wordpress/?p=904