protected override bool CanBegin(PinchGesture gesture, FingerGestures.IFingerList touches)
{
if (!base.CanBegin(gesture, touches))
{
return(false);
}
FingerGestures.Finger finger0 = touches[0];
FingerGestures.Finger finger1 = touches[1];
if (!FingerGestures.AllFingersMoving(finger0, finger1))
{
return(false);
}
if (!FingersMovedInOppositeDirections(finger0, finger1))
{
return(false);
}
float startGap = Vector2.SqrMagnitude(finger0.StartPosition - finger1.StartPosition);
float curGap = Vector2.SqrMagnitude(finger0.Position - finger1.Position);
if (FingerGestures.GetAdjustedPixelDistance(Mathf.Abs(startGap - curGap)) < (MinDistance * MinDistance))
{
return(false);
}
return(true);
}
protected override GestureRecognitionState OnRecognize(PointCloudGesture gesture, FingerGestures.IFingerList touches)
{
if (touches.Count != RequiredFingerCount)
{
// fingers lifted off?
if (touches.Count < RequiredFingerCount)
{
// recognize
if (RecognizePointCloud(gesture))
{
return(GestureRecognitionState.Recognized);
}
return(GestureRecognitionState.Failed);
}
return(GestureRecognitionState.Failed);
}
// update current gesture position
gesture.Position = touches.GetAveragePosition();
float minSampleDelta = FingerGestures.GetAdjustedPixelDistance(MinDistanceBetweenSamples);
Vector2 lastSamplePos = gesture.RawPoints[gesture.RawPoints.Count - 1].Position;
// check if we should take a new sample
if (Vector2.SqrMagnitude(gesture.Position - lastSamplePos) > minSampleDelta * minSampleDelta)
{
int strokeId = 0; //TODO increment this after each finger up>down
gesture.RawPoints.Add(new Point(strokeId, gesture.Position));
}
return(GestureRecognitionState.InProgress);
}
// Find closest cluster within radius
Cluster FindExistingCluster(FingerGestures.Finger finger)
{
Cluster best = null;
float bestSqrDist = float.MaxValue;
// account for higher pixel density touch screens
float adjustedClusterRadius = FingerGestures.GetAdjustedPixelDistance(ClusterRadius);
foreach (Cluster cluster in clusters)
{
float elapsedTime = finger.StarTime - cluster.StartTime;
// temporal grouping criteria
if (elapsedTime > TimeTolerance)
{
continue;
}
Vector2 centroid = cluster.Fingers.GetAveragePosition();
float sqrDist = Vector2.SqrMagnitude(finger.Position - centroid);
if (sqrDist < bestSqrDist && sqrDist < (adjustedClusterRadius * adjustedClusterRadius))
{
best = cluster;
bestSqrDist = sqrDist;
}
}
return(best);
}
protected override void OnBegin(PinchGesture gesture, FingerGestures.IFingerList touches)
{
FingerGestures.Finger finger0 = touches[0];
FingerGestures.Finger finger1 = touches[1];
gesture.StartPosition = 0.5f * (finger0.StartPosition + finger1.StartPosition);
gesture.Position = 0.5f * (finger0.Position + finger1.Position);
gesture.Gap = Vector2.Distance(finger0.StartPosition, finger1.StartPosition);
float curGap = Vector2.Distance(finger0.Position, finger1.Position);
gesture.Delta = FingerGestures.GetAdjustedPixelDistance(DeltaScale * (curGap - gesture.Gap));
gesture.Gap = curGap;
}
protected override GestureRecognitionState OnRecognize(PinchGesture gesture, FingerGestures.IFingerList touches)
{
if (touches.Count != RequiredFingerCount)
{
gesture.Delta = 0;
// fingers were lifted?
if (touches.Count < RequiredFingerCount)
{
return(GestureRecognitionState.Recognized);
}
// more fingers added, gesture failed
return(GestureRecognitionState.Failed);
}
FingerGestures.Finger finger0 = touches[0];
FingerGestures.Finger finger1 = touches[1];
gesture.Position = 0.5f * (finger0.Position + finger1.Position);
float curGap = Vector2.Distance(finger0.Position, finger1.Position);
// dont do anything if both fingers arent moving
if (!FingerGestures.AllFingersMoving(finger0, finger1))
{
return(GestureRecognitionState.InProgress);
}
float newDelta = FingerGestures.GetAdjustedPixelDistance(DeltaScale * (curGap - gesture.Gap));
gesture.Gap = curGap;
if (Mathf.Abs(newDelta) > 0.001f)
{
if (!FingersMovedInOppositeDirections(finger0, finger1))
{
// skip without firing event
return(GestureRecognitionState.Failed);// GestureRecognitionState.InProgress; //TODO: might want to make this configurable, so the recognizer can fail if fingers move in same direction
}
gesture.Delta = newDelta;
RaiseEvent(gesture);
}
return(GestureRecognitionState.InProgress);
}
protected override GestureRecognitionState OnRecognize(SwipeGesture gesture, FingerGestures.IFingerList touches)
{
if (touches.Count != RequiredFingerCount)
{
// more fingers were added - fail right away
if (touches.Count > RequiredFingerCount)
{
return(GestureRecognitionState.Failed);
}
//
// fingers were lifted-off
//
// didn't swipe far enough
if (FingerGestures.GetAdjustedPixelDistance(gesture.Move.magnitude) < Mathf.Max(1, MinDistance))
{
return(GestureRecognitionState.Failed);
}
// get approx swipe direction
gesture.Direction = FingerGestures.GetSwipeDirection(gesture.Move);
return(GestureRecognitionState.Recognized);
}
Vector2 previousMotion = gesture.Move;
gesture.Position = touches.GetAveragePosition();
gesture.Move = gesture.Position - gesture.StartPosition;
float distance = FingerGestures.GetAdjustedPixelDistance(gesture.Move.magnitude);
// moved too far
if (MaxDistance > MinDistance && distance > MaxDistance)
{
//Debug.LogWarning( "Too far: " + distance );
return(GestureRecognitionState.Failed);
}
if (gesture.ElapsedTime > 0)
{
gesture.Velocity = distance / gesture.ElapsedTime;
}
else
{
gesture.Velocity = 0;
}
// we're going too slow
if (gesture.MoveCounter > 2 && gesture.Velocity < MinVelocity)
{
//Debug.LogWarning( "Too slow: " + gesture.Velocity );
return(GestureRecognitionState.Failed);
}
/*
* FingerGestures.SwipeDirection newDirection = FingerGestures.GetSwipeDirection( Move.normalized, DirectionTolerance );
*
* // we went in a bad direction
* if( !IsValidDirection( newDirection ) || ( direction != FingerGestures.SwipeDirection.None && newDirection != direction ) )
* return GestureRecognitionState.Failed;
*
* direction = newDirection;
*/
// check if we have deviated too much from our initial direction
if (distance > 50.0f && gesture.MoveCounter > 2)
{
// accumulate delta angle
gesture.Deviation += Mathf.Rad2Deg * FingerGestures.SignedAngle(previousMotion, gesture.Move);
if (Mathf.Abs(gesture.Deviation) > MaxDeviation)
{
//Debug.LogWarning( "Swipe: deviated too much from initial direction (" + gesture.Deviation + ")" );
return(GestureRecognitionState.Failed);
}
}
++gesture.MoveCounter;
return(GestureRecognitionState.InProgress);
}
protected override GestureRecognitionState OnRecognize(PinchRotateGesture gesture, FingerGestures.IFingerList touches)
{
if (touches.Count != RequiredFingerCount)
{
gesture.Delta = 0;
// fingers were lifted?
if (touches.Count < RequiredFingerCount)
{
return(GestureRecognitionState.Recognized);
}
// more fingers added, gesture failed
return(GestureRecognitionState.Failed);
}
FingerGestures.Finger finger0 = touches[0];
FingerGestures.Finger finger1 = touches[1];
gesture.Position = 0.5f * (finger0.Position + finger1.Position);
float curGap = Vector2.Distance(finger0.Position, finger1.Position);
// dont do anything if both fingers arent moving
if (!FingerGestures.AllFingersMoving(finger0, finger1)) // && curGap >= UnityEngine.Screen.width * 0.25f
{
return(GestureRecognitionState.InProgress);
}
float newDelta = FingerGestures.GetAdjustedPixelDistance(DeltaScale * (curGap - gesture.Gap));
gesture.Gap = curGap;
// if( Mathf.Abs( newDelta ) > 0.001f )
{
if (touches.AllMoving() && touches.MovingInSameDirection(0.35f))//&& curGap < UnityEngine.Screen.width*0.25f
{
EventMessageName = OnTwoFingerDrag;
//Debug.Log("OnTwoFingerDrag rec");
// skip without firing event
// return GestureRecognitionState.InProgress;// GestureRecognitionState.InProgress; //TODO: might want to make this configurable, so the recognizer can fail if fingers move in same direction
}
else if (touches.AllMoving() && FingersMovedInOppositeDirections(finger0, finger1))
{
EventMessageName = EventOnPinch;
// Debug.Log("EventOnPinch rec");
}
else
{
// Debug.Log("pinch rotate inProgress");
return(GestureRecognitionState.InProgress);
}
gesture.LastDelta = gesture.DeltaMove;
gesture.Delta = newDelta;
gesture.DeltaMove = gesture.Position - gesture.LastPos;
// if we are currently moving, or we were still moving last frame (allows listeners to detect when the finger is stationary when MoveDelta = 0)...
if (gesture.DeltaMove.sqrMagnitude > 0 || gesture.LastDelta.sqrMagnitude > 0)
{
gesture.LastPos = gesture.Position;
}
RaiseEvent(gesture);
}
return(GestureRecognitionState.InProgress);
}
