---
name: "SDL_JoyBallEvent"
section: "3type"
platform: "linux"
package: "libsdl3-doc"
version: "3.2.10+ds-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/SDL_JoyBallEvent/3type"
---

# SDL\_JoyBallEvent(3type)

Joystick trackball motion event structure (event.jball.\*)

## 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.