Gravity demo

Small iPhone and iPod touch application showning pool balls over a pool table under the influence of gravity, using the accelerometers from the device to know where the balls should fall.

Code Organization

“Classes” directory contains the code for the application, and “Chipmuck” contains the code for the Chipmuck physics library.

“Classes” directory

• GRAppDelegate: Initialization code for the application.
• GRController: Initialization code for the objects and physics. Drawing code for the OpenGL view. Delegate for both GREAGLView and UIAccelerator.
• GREAGLView: Typical OpenGL view with delegate.
• GRSprite: Common code for all sprites.
• GRPoolTable: Builds the pool table static physics object. Optimization code for drawing the sprite on the device using DrawTex extension.
• GRPoolTable: Build a ball physics object.
• Texture2D: Loads images and turn them into OpenGL textures.

Work to do

• Some kind of texture manager: right now each ball generates its own texture.
• Better organization for the physics integration (passing around the space and static body doesn't seems right).
• Implement the right physics: Chipmuck do not work for “over the table” physics.

Credits

Author: Daniel Rodríguez Troitiño (drodrigueztroitino thAT yahoo thOT es).

Using Chipmunk http://code.google.com/p/chipmunk-physics/ for the physics simulation. Chipmuck 4.1.0 code is included.

Using Texture2D code provided by Apple in the old sample Lunar Lander.