- This reduces the number of types associated with input; adding a
distinct input type doesn't introduce a whole new enumerated type
and related functions.
- Special handling for different devices is needed less often. If you
want to respond to an F1 press, simply check for KEY_F1; the device
type doesn't really matter (though it'll usually be a keyboard).
- This allows cleaner support for generalized USB devices. While they're
usually of the traditional classes (keyboard, joystick) with associated
inputs, they don't have to be.
- Forced casts between parallel types can be removed, and weakly-specified
variables (ints instead of the enum type) can be fixed.
Some things that might have been merged havn't; for example, arrow keys
on a keyboard (KEY_UP) are still distinct from axes on a joystick (JOY_UP).
These may or may not be merged in the future.
Some were: removed PUMP_ symbols. Treat them as generic buttons, and just
give them names with GetDeviceSpecificInputString. It's not worth
introducing more special names for something only used in one place.
Glenn Maynard