public void Update()
{
DragGestureRecognizer.Update();
PinchGestureRecognizer.Update();
TwoFingerDragGestureRecognizer.Update();
TapGestureRecognizer.Update();
TwistGestureRecognizer.Update();
}
/// <summary>
/// Constructs a PinchGesture gesture.
/// </summary>
/// <param name="recognizer">The gesture recognizer.</param>
/// <param name="touch1">The first touch that started this gesture.</param>
/// <param name="touch2">The second touch that started this gesture.</param>
public TwistGesture(TwistGestureRecognizer recognizer, Touch touch1, Touch touch2) :
base(recognizer)
{
FingerId1 = touch1.fingerId;
FingerId2 = touch2.fingerId;
StartPosition1 = touch1.position;
StartPosition2 = touch2.position;
}
private void DisconnectFromRecognizers()
{
if (ManipulationSystem.Instance == null)
{
Debug.LogError("Manipulation system not found in scene.");
return;
}
DragGestureRecognizer dragGestureRecognizer =
ManipulationSystem.Instance.DragGestureRecognizer;
if (dragGestureRecognizer != null)
{
dragGestureRecognizer.onGestureStarted -= OnGestureStarted;
}
PinchGestureRecognizer pinchGestureRecognizer =
ManipulationSystem.Instance.PinchGestureRecognizer;
if (pinchGestureRecognizer != null)
{
pinchGestureRecognizer.onGestureStarted -= OnGestureStarted;
}
TapGestureRecognizer tapGestureRecognizer =
ManipulationSystem.Instance.TapGestureRecognizer;
if (tapGestureRecognizer != null)
{
tapGestureRecognizer.onGestureStarted -= OnGestureStarted;
}
TwistGestureRecognizer twistGestureRecognizer =
ManipulationSystem.Instance.TwistGestureRecognizer;
if (twistGestureRecognizer != null)
{
twistGestureRecognizer.onGestureStarted -= OnGestureStarted;
}
TwoFingerDragGestureRecognizer twoFingerDragGestureRecognizer =
ManipulationSystem.Instance.TwoFingerDragGestureRecognizer;
if (twoFingerDragGestureRecognizer != null)
{
twoFingerDragGestureRecognizer.onGestureStarted -= OnGestureStarted;
}
}
/// <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);
}