Audio

A basic interface for audio modules has been designed and can be found in the audio.h file. There is a "null" audio implementation that provides the functions expected and used by the game's core, but does not actually produce any sound. It is the default audio module for now, until the project has some sounds to use and an implementation that produces sound, and may still remain useful in the future, e.g. for dedicated servers.

A partial audio implementation based on SDL_mixer is also included, but it may be a better idea to use OpenAL instead, since it provides a 3D sound interface.