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Game development with_lib_gdx

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Gabriel Grill
Gabriel Grill

LibGDX is an open source, cross-platform game development framework. It allows developers to write games that can be deployed to desktop, Android, iOS, and HTML5 web browsers. LibGDX provides tools for game development including asset management, 2D and 3D graphics rendering, input handling, audio playback, and more. It aims to be highly performant and optimized for mobile platforms. Getting started involves creating a project, adding the LibGDX libraries, and implementing the ApplicationListener interface.

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Game Development with By Gabriel Grill
LibGDX is ... open source cross-platform Desktop Web Smartphone performant JNI Wrapper optimised for Davlik VM well documented Wiki, Forum, Blog, JavaDoc, Demos, Videos, ..
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
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*/); } }
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(){ } }
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*/); } }
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
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
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
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
Demos Now lets see some Code
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

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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 lets 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