Mobile Pinch Zoom

 

Getting Mobile Input - Unity Learn

 

 

핀치줌 변화량 리턴하는 매소드

private float getPichZoomValue()
        {
            float deltaMagnitudeDiff = 0f; 

            if (Input.touchCount == 2)
            {
                Touch touchZero = Input.GetTouch(0);
                Touch touchOne = Input.GetTouch(1);

                Vector2 touchZeroPrevPos = touchZero.position - touchZero.deltaPosition;
                Vector2 touchOnePrevPos = touchOne.position - touchOne.deltaPosition;

                float prevTouchDeltaMag = (touchZeroPrevPos - touchOnePrevPos).magnitude;
                float touchDeltaMag = (touchZero.position - touchOne.position).magnitude;

                deltaMagnitudeDiff = prevTouchDeltaMag - touchDeltaMag;
            }
            return deltaMagnitudeDiff;
        }