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

SDL_SetJoystickVirtualBall

Generate ball motion on an opened virtual joystick.

Header File

Defined in <SDL3/SDL_joystick.h>

Syntax

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

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

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

Remarks

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.

Version

This function is available since SDL 3.0.0.

CategoryAPI, CategoryAPIFunction, CategoryJoystick