iOS OpenGL ES compatible with Android OpenGL ES?

Question

In theory, can I write a game for iOS in openGL ES and expect to easily port it to Android? How about from Android to iOS?

Answer 1

Yes, I believe that if you write a game in C/C++ for iOS, to port it to Android wouldn't be too much of a hassle. However, if you write the game in Objective-C, then it could be quite a hassle indeed.

Answer 2

There are differences in Android and iOS game development that you need to take into account:

In android you need to support multiple graphics chips:

• Different texture compression support
• Major differences in performance

Different OpenGL ES implementations:

• Buggy gluUnproject implementation in Android (there are custom implementations, for example )
• Lack of glGet* functions in Android (however you can use MatrixTrackingGL)