Game controller axis motion event structure (event.caxis.*)
Defined in SDL_events.h
typedef struct SDL_ControllerAxisEvent
{/**< SDL_CONTROLLERAXISMOTION */
Uint32 type; /**< In milliseconds, populated using SDL_GetTicks() */
Uint32 timestamp; /**< The joystick instance id */
SDL_JoystickID which; /**< The controller axis (SDL_GameControllerAxis) */
Uint8 axis;
Uint8 padding1;
Uint8 padding2;
Uint8 padding3;/**< The axis value (range: -32768 to 32767) */
Sint16 value;
Uint16 padding4; } SDL_ControllerAxisEvent;