SDL_GamepadAxis.3type - Man Page

#include <SDL3/SDL_gamepad.h>

typedef enum SDL_GamepadAxis
{
    SDL_GAMEPAD_AXIS_INVALID = -1,
    SDL_GAMEPAD_AXIS_LEFTX,
    SDL_GAMEPAD_AXIS_LEFTY,
    SDL_GAMEPAD_AXIS_RIGHTX,
    SDL_GAMEPAD_AXIS_RIGHTY,
    SDL_GAMEPAD_AXIS_LEFT_TRIGGER,
    SDL_GAMEPAD_AXIS_RIGHT_TRIGGER,
    SDL_GAMEPAD_AXIS_COUNT
} SDL_GamepadAxis;

Thumbstick axis values range from SDL_JOYSTICK_AXIS_MIN to SDL_JOYSTICK_AXIS_MAX, and are centered within ~8000 of zero, though advanced UI will allow users to set or autodetect the dead zone, which varies between gamepads.

Trigger axis values range from 0 (released) to SDL_JOYSTICK_AXIS_MAX (fully pressed) when reported by SDL_GetGamepadAxis(). Note that this is not the same range that will be reported by the lower-level SDL_GetJoystickAxis().

This enum is available since SDL 3.2.0.