Provides a polling-based API to use gamepads/joysticks on Linux and Windows.
Pass -version=ps1_style or -version=xbox_style to pick your API style - the constants will use the names of the buttons on those controllers and attempt to emulate the other. ps1_style is compatible with more hardware and thus the default. XBox controllers work with either, though.
The docs for this file are quite weak, I suggest you view source of arsd.game for an example of how it might be used.
FIXME: on Linux, certain controller brands will not be recognized and you need to set the mappings yourself, e.g., version(linux) joystickMapping = &xbox360Mapping;. I will formalize this into a proper api later.
Returns the number of players actually connected
For Linux only, reads the latest joystick events into the change buffer, if available. It is non-blocking