Provided by: libsdl3-doc_3.2.8+ds-1_all 

NAME
SDL_JoyBallEvent - Joystick trackball motion event structure (event.jball.*)
HEADER FILE
Defined in SDL3/SDL_events.h
SYNOPSIS
#include "SDL3/SDL.h"
typedef struct SDL_JoyBallEvent
{
SDL_EventType type; /**< SDL_EVENT_JOYSTICK_BALL_MOTION */
Uint32 reserved;
Uint64 timestamp; /**< In nanoseconds, populated using SDL_GetTicksNS() */
SDL_JoystickID which; /**< The joystick instance id */
Uint8 ball; /**< The joystick trackball index */
Uint8 padding1;
Uint8 padding2;
Uint8 padding3;
Sint16 xrel; /**< The relative motion in the X direction */
Sint16 yrel; /**< The relative motion in the Y direction */
} SDL_JoyBallEvent;
AVAILABILITY
This struct is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.8 SDL_JoyBallEvent(3type)