/// <summary>
/// Updates this gesture.
/// </summary>
/// <returns>True if the update was successful.</returns>
protected internal override bool UpdateGesture()
{
Touch touch1, touch2;
bool foundTouches = GestureTouchesUtility.TryFindTouch(FingerId1, out touch1);
foundTouches =
GestureTouchesUtility.TryFindTouch(FingerId2, out touch2) && foundTouches;
if (!foundTouches)
{
Cancel();
return(false);
}
if (touch1.phase == TouchPhase.Canceled || touch2.phase == TouchPhase.Canceled)
{
Cancel();
return(false);
}
if (touch1.phase == TouchPhase.Ended || touch2.phase == TouchPhase.Ended)
{
Complete();
return(false);
}
if (touch1.phase == TouchPhase.Moved || touch2.phase == TouchPhase.Moved)
{
float rotation = CalculateDeltaRotation(
touch1.position,
touch2.position,
m_PreviousPosition1,
m_PreviousPosition2);
DeltaRotation = rotation;
m_PreviousPosition1 = touch1.position;
m_PreviousPosition2 = touch2.position;
return(true);
}
m_PreviousPosition1 = touch1.position;
m_PreviousPosition2 = touch2.position;
DeltaRotation = 0.0f;
return(false);
}
/// <summary>
/// Action to be performed when this gesture is started.
/// </summary>
protected internal override void OnStart()
{
GestureTouchesUtility.LockFingerId(FingerId);
RaycastHit hit;
if (GestureTouchesUtility.RaycastFromCamera(StartPosition, out hit))
{
var gameObject = hit.transform.gameObject;
if (gameObject != null)
{
TargetObject = gameObject.GetComponentInParent <Manipulator>().gameObject;
}
}
Touch touch;
GestureTouchesUtility.TryFindTouch(FingerId, out touch);
Position = touch.position;
}
/// <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);
}
/// <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 = Recognizer as TwistGestureRecognizer;
float rotation = CalculateDeltaRotation(
touch1.position, touch2.position, StartPosition1, StartPosition2);
if (Mathf.Abs(rotation) < twistRecognizer.SlopRotation)
{
return(false);
}
return(true);
}
/// <summary>
/// Updates this gesture.
/// </summary>
/// <returns>True if the update was successful.</returns>
protected internal override bool UpdateGesture()
{
Touch touch1, touch2;
bool foundTouches = GestureTouchesUtility.TryFindTouch(FingerId1, out touch1);
foundTouches =
GestureTouchesUtility.TryFindTouch(FingerId2, out touch2) && foundTouches;
if (!foundTouches)
{
Cancel();
return(false);
}
if (touch1.phase == TouchPhase.Canceled || touch2.phase == TouchPhase.Canceled)
{
Cancel();
return(false);
}
if (touch1.phase == TouchPhase.Ended || touch2.phase == TouchPhase.Ended)
{
Complete();
return(false);
}
if (touch1.phase == TouchPhase.Moved || touch2.phase == TouchPhase.Moved)
{
float newgap = (touch1.position - touch2.position).magnitude;
GapDelta = newgap - Gap;
Gap = newgap;
return(true);
}
return(false);
}