SDL Wiki
(This is the legacy documentation for stable SDL2, the current stable version; SDL3 is the current development version.)


Set values on an opened, virtual-joystick's axis.


int SDL_JoystickSetVirtualAxis(SDL_Joystick *joystick, int axis, Sint16 value);

Function Parameters

joystick the virtual joystick on which to set state.
axis the specific axis on the virtual joystick to set.
value the new value for the specified axis.

Return Value

Returns 0 on success, -1 on error.


Please note that values set here will not be applied until the next call to SDL_JoystickUpdate, 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.

Note that when sending trigger axes, you should scale the value to the full range of Sint16. For example, a trigger at rest would have the value of SDL_JOYSTICK_AXIS_MIN.


This function is available since SDL 2.0.14.


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