Get the number of haptic axes the device has.
int SDL_HapticNumAxes(SDL_Haptic * haptic);
the SDL_Haptic device to query
Returns the number of axes on success or a negative error code on failure; call SDL_GetError() for more information.
The number of haptic axes might be useful if working with the SDL_HapticDirection effect.
This function is available since SDL 2.0.0.