Multiple Finger Gesture Event (event.mgesture.*)
Defined in SDL_events.h
typedef struct SDL_MultiGestureEvent
{/**< SDL_MULTIGESTURE */
Uint32 type; /**< In milliseconds, populated using SDL_GetTicks() */
Uint32 timestamp; /**< The touch device id */
SDL_TouchID touchId; float dTheta;
float dDist;
float x;
float y;
Uint16 numFingers;
Uint16 padding; } SDL_MultiGestureEvent;