sdlJoystickGetBall function

int sdlJoystickGetBall(Pointer<SdlJoystick> joystick, int ball, Pointer<Int32> dx, Pointer<Int32> dy,)

Get the ball axis change since the last poll.

Trackballs can only return relative motion since the last call to SDL_JoystickGetBall(), these motion deltas are placed into dx and dy.

Most joysticks do not have trackballs.

\param joystick the SDL_Joystick to query \param ball the ball index to query; ball indices start at index 0 \param dx stores the difference in the x axis position since the last poll \param dy stores the difference in the y axis position since the last poll \returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.

\since This function is available since SDL 2.0.0.

\sa SDL_JoystickNumBalls

extern DECLSPEC int SDLCALL SDL_JoystickGetBall(SDL_Joystick *joystick, int ball, int *dx, int *dy)

Implementation

int sdlJoystickGetBall(Pointer<SdlJoystick> joystick, int ball,
    Pointer<Int32> dx, Pointer<Int32> dy) {
  final sdlJoystickGetBallLookupFunction = libSdl2.lookupFunction<
      Int32 Function(Pointer<SdlJoystick> joystick, Int32 ball,
          Pointer<Int32> dx, Pointer<Int32> dy),
      int Function(Pointer<SdlJoystick> joystick, int ball, Pointer<Int32> dx,
          Pointer<Int32> dy)>('SDL_JoystickGetBall');
  return sdlJoystickGetBallLookupFunction(joystick, ball, dx, dy);
}