SDL_JoyBallEvent man page on JazzOS

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SDL_JoyBallEvent(3)	       SDL API Reference	   SDL_JoyBallEvent(3)

       SDL_JoyBallEvent - Joystick trackball motion event structure

       typedef struct{
	 Uint8 type;
	 Uint8 which;
	 Uint8 ball;
	 Sint16 xrel, yrel;
       } SDL_JoyBallEvent;

       type		   SDL_JOYBALLMOTION

       which		   Joystick device index

       ball		   Joystick trackball index

       xrel, yrel	   The relative motion in the X/Y direction

       SDL_JoyBallEvent is a member of the SDL_Event union and is used when an
       event of type SDL_JOYBALLMOTION is reported.

       A SDL_JOYBALLMOTION event occurs when a user moves a trackball  on  the
       joystick.  The  field  which is the index of the joystick that reported
       the event and ball is the index of the trackball (for a	more  detailed
       explaination see the Joystick section). Trackballs only return relative
       motion, this is the change in position on the ball since	 it  was  last
       polled  (last  cycle  of	 the  event loop) and it is stored in xrel and

       SDL_Event, Joystick Functions, SDL_JoystickEventState, SDL_JoystickGet‐

SDL			    Tue 11 Sep 2001, 22:59	   SDL_JoyBallEvent(3)

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