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(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)


Generate ball motion on an opened virtual joystick.

Header File

Defined in <SDL3/SDL_joystick.h>


int SDL_SetJoystickVirtualBall(SDL_Joystick *joystick, int ball, Sint16 xrel, Sint16 yrel);

Function Parameters

SDL_Joystick * joystick the virtual joystick on which to set state.
int ball the index of the ball on the virtual joystick to update.
Sint16 xrel the relative motion on the X axis.
Sint16 yrel the relative motion on the Y axis.

Return Value

(int) Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.


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.


This function is available since SDL 3.0.0.

CategoryAPI, CategoryAPIFunction, CategoryJoystick

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