Provided by: libsdl3-doc_3.2.20+ds-2_all 

NAME
SDL_SetJoystickVirtualBall - Generate ball motion on an opened virtual joystick.
SYNOPSIS
#include <SDL3/SDL_joystick.h>
bool SDL_SetJoystickVirtualBall(SDL_Joystick *joystick, int ball, Sint16 xrel, Sint16 yrel);
DESCRIPTION
Please note that values set here will not be applied until the next call to SDL_UpdateJoysticks, which
can either be called directly, or can be called indirectly through various other SDL APIs, including, but
not limited to the following: SDL_PollEvent, SDL_PumpEvents, SDL_WaitEventTimeout, SDL_WaitEvent.
FUNCTION PARAMETERS
joystick
the virtual joystick on which to set state.
ball the index of the ball on the virtual joystick to update.
xrel the relative motion on the X axis.
yrel the relative motion on the Y axis.
RETURN VALUE
for more information.
AVAILABILITY
This function is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.20 SDL_SetJoystickVirtualBall(3)