/// <summary> /// Returns true if this gesture can start. /// </summary> /// <returns>True if the gesture can start.</returns> protected internal override bool CanStart() { if (GestureTouchesUtility.IsFingerIdRetained(FingerId1) || GestureTouchesUtility.IsFingerIdRetained(FingerId2)) { Cancel(); return false; } Touch touch1, touch2; bool foundTouches = GestureTouchesUtility.TryFindTouch(FingerId1, out touch1); foundTouches = GestureTouchesUtility.TryFindTouch(FingerId2, out touch2) && foundTouches; if (!foundTouches) { Cancel(); return false; } // Check that both fingers are moving. if (touch1.deltaPosition == Vector2.zero || touch2.deltaPosition == Vector2.zero) { return false; } TwistGestureRecognizer twistRecognizer = m_Recognizer as TwistGestureRecognizer; float rotation = CalculateDeltaRotation(touch1.position, touch2.position, StartPosition1, StartPosition2); if (Mathf.Abs(rotation) < twistRecognizer.m_SlopRotation) { return false; } return true; }
/// <summary> /// Returns true if this gesture can start. /// </summary> /// <returns>True if the gesture can start.</returns> protected internal override bool CanStart() { if (GestureTouchesUtility.IsFingerIdRetained(FingerId1) || GestureTouchesUtility.IsFingerIdRetained(FingerId2)) { Cancel(); return(false); } Touch touch1, touch2; bool foundTouches = GestureTouchesUtility.TryFindTouch(FingerId1, out touch1); foundTouches = GestureTouchesUtility.TryFindTouch(FingerId2, out touch2) && foundTouches; if (!foundTouches) { Cancel(); return(false); } // Check that at least one finger is moving. if (touch1.deltaPosition == Vector2.zero && touch2.deltaPosition == Vector2.zero) { return(false); } PinchGestureRecognizer pinchRecognizer = Recognizer as PinchGestureRecognizer; Vector3 firstToSecondDirection = (StartPosition1 - StartPosition2).normalized; float dot1 = Vector3.Dot(touch1.deltaPosition.normalized, -firstToSecondDirection); float dot2 = Vector3.Dot(touch2.deltaPosition.normalized, firstToSecondDirection); float dotThreshold = Mathf.Cos(pinchRecognizer.SlopMotionDirectionDegrees * Mathf.Deg2Rad); // Check angle of motion for the first touch. if (touch1.deltaPosition != Vector2.zero && Mathf.Abs(dot1) < dotThreshold) { return(false); } // Check angle of motion for the second touch. if (touch2.deltaPosition != Vector2.zero && Mathf.Abs(dot2) < dotThreshold) { return(false); } float startgap = (StartPosition1 - StartPosition2).magnitude; Gap = (touch1.position - touch2.position).magnitude; float separation = GestureTouchesUtility.PixelsToInches(Mathf.Abs(Gap - startgap)); if (separation < pinchRecognizer.SlopInches) { return(false); } return(true); }
/// <summary> /// Returns true if this gesture can start. /// </summary> /// <returns>True if the gesture can start.</returns> protected internal override bool CanStart() { if (GestureTouchesUtility.IsFingerIdRetained(FingerId)) { Cancel(); return(false); } return(true); }
/// <summary> /// Returns true if this gesture can start. /// </summary> /// <returns>True if the gesture can start.</returns> protected internal override bool CanStart() { if (GestureTouchesUtility.IsFingerIdRetained(FingerId1) || GestureTouchesUtility.IsFingerIdRetained(FingerId2)) { Cancel(); return(false); } Touch touch1, touch2; bool foundTouches = GestureTouchesUtility.TryFindTouch(FingerId1, out touch1); foundTouches = GestureTouchesUtility.TryFindTouch(FingerId2, out touch2) && foundTouches; if (!foundTouches) { Cancel(); return(false); } // Check that at least one finger is moving. if (touch1.deltaPosition == Vector2.zero && touch2.deltaPosition == Vector2.zero) { return(false); } Vector2 pos1 = touch1.position; float diff1 = (pos1 - StartPosition1).magnitude; Vector2 pos2 = touch2.position; float diff2 = (pos2 - StartPosition2).magnitude; float slopInches = (Recognizer as TwoFingerDragGestureRecognizer).SlopInches; if (GestureTouchesUtility.PixelsToInches(diff1) < slopInches || GestureTouchesUtility.PixelsToInches(diff2) < slopInches) { return(false); } TwoFingerDragGestureRecognizer recognizer = Recognizer as TwoFingerDragGestureRecognizer; // Check both fingers move in the same direction. float dot = Vector3.Dot(touch1.deltaPosition.normalized, touch2.deltaPosition.normalized); if (dot < Mathf.Cos(recognizer.AngleThresholdRadians)) { return(false); } return(true); }
/// <summary> /// Returns true if this gesture can start. /// </summary> /// <returns>True if the gesture can start.</returns> protected internal override bool CanStart() { if (GestureTouchesUtility.IsFingerIdRetained(FingerId)) { Cancel(); return(false); } if (Input.touches.Length > 1) { for (int i = 0; i < Input.touches.Length; i++) { Touch currentTouch = Input.touches[i]; if (currentTouch.fingerId != FingerId && !GestureTouchesUtility.IsFingerIdRetained(currentTouch.fingerId)) { return(false); } } } Touch touch; if (GestureTouchesUtility.TryFindTouch(FingerId, out touch)) { Vector2 pos = touch.position; float diff = (pos - StartPosition).magnitude; if (GestureTouchesUtility.PixelsToInches(diff) >= (m_Recognizer as DragGestureRecognizer).m_SlopInches) { return(true); } } else { Cancel(); } return(false); }