SDL_PinchFingerEvent.3type - Man Page

#include <SDL3/SDL_events.h>

typedef struct SDL_PinchFingerEvent
{
    SDL_EventType type; /**< ::SDL_EVENT_PINCH_BEGIN or ::SDL_EVENT_PINCH_UPDATE or ::SDL_EVENT_PINCH_END */
    Uint32 reserved;
    Uint64 timestamp;   /**< In nanoseconds, populated using SDL_GetTicksNS() */
    float scale;        /**< The scale change since the last SDL_EVENT_PINCH_UPDATE. Scale < 1 is "zoom out". Scale > 1 is "zoom in". */
    SDL_WindowID windowID; /**< The window underneath the finger, if any */
} SDL_PinchFingerEvent;