SDL_GetJoystickBall3
Get the ball axis change since the last poll.
Usage
#include "SDL3/SDL.h"
bool SDL_GetJoystickBall(SDL_Joystick *joystick, int ball, int *dx, int *dy);
Header file
Defined in SDL3/SDL_joystick.h
Overview
Trackballs can only return relative motion since the last call to
SDL_GetJoystickBall (), these motion deltas are placed into dx and dy .
Most joysticks do not have trackballs.
Function parameters
joystick
|
the |
|---|---|
ball
|
the ball index to query; ball indices start at index 0. |
dx
|
stores the difference in the x axis position since the last poll. |
dy
|
stores the difference in the y axis position since the last poll. |
Return value
Returns true on success or false on failure; call
SDL_GetError () for more information.