plucky (3) SDL_TouchFingerEvent.3type.gz

NAME

       SDL_TouchFingerEvent - Touch finger event structure (event.tfinger.*)

HEADER FILE

       Defined in SDL3/SDL_events.h

SYNOPSIS

       #include "SDL3/SDL.h"

       typedef struct SDL_TouchFingerEvent
       {
           SDL_EventType type; /**< SDL_EVENT_FINGER_DOWN, SDL_EVENT_FINGER_UP, SDL_EVENT_FINGER_MOTION, or SDL_EVENT_FINGER_CANCELED */
           Uint32 reserved;
           Uint64 timestamp;   /**< In nanoseconds, populated using SDL_GetTicksNS() */
           SDL_TouchID touchID; /**< The touch device id */
           SDL_FingerID fingerID;
           float x;            /**< Normalized in the range 0...1 */
           float y;            /**< Normalized in the range 0...1 */
           float dx;           /**< Normalized in the range -1...1 */
           float dy;           /**< Normalized in the range -1...1 */
           float pressure;     /**< Normalized in the range 0...1 */
           SDL_WindowID windowID; /**< The window underneath the finger, if any */
       } SDL_TouchFingerEvent;

DESCRIPTION

       Coordinates  in  this  event  are  normalized.   x and y are normalized to a range between 0.0f and 1.0f,
       relative to the window, so (0,0) is the top left and (1,1) is the bottom right. Delta coordinates dx  and
       dy  are  normalized in the ranges of -1.0f (traversed all the way from the bottom or right to all the way
       up or left) to 1.0f (traversed all the way from the top or left to all the way down or right).

       Note that while  the  coordinates  are  _normalized_,  they  are  not  _clamped_,  which  means  in  some
       circumstances  you  can  get  a  value  outside  of  this  range.  For  example, a renderer using logical
       presentation might give a negative value when the touch is in  the  letterboxing.  Some  platforms  might
       report a touch outside of the window, which will also be outside of the range.

AVAILABILITY

       This struct is available since SDL 3.2.0.