SDL Wiki
(This is the documentation for SDL3, which is the current stable version. SDL2 was the previous version!)

SDL_FingerID

A unique ID for a single finger on a touch device.

Header File

Defined in <SDL3/SDL_touch.h>

Syntax

typedef Uint64 SDL_FingerID;

Remarks

This ID is valid for the time the finger (stylus, etc) is touching, and is never reused for the lifetime of the application.

The same physical finger will have a different ID if it lifts off the touch device and then starts a new touch, so this ID tracks the lifetime of a single continuous touch.

The value 0 is an invalid ID.

Version

This datatype is available since SDL 3.1.3.

CategoryAPI, CategoryAPIDatatype, CategoryTouch

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