public void AddTouch(TouchPt touch)
{
TouchPt existingTouch;
if (GetExistingTouch(touch, out existingTouch))
{
existingTouch.Update(touch);
touch = existingTouch;
}
_touchList.Add(touch);
}
public void Update(TouchPt touch)
{
if (fingerId != touch.fingerId)
{
throw new InvalidOperationException(string.Format("Cannot update touch ID {0} from ID {1}", fingerId, touch.fingerId));
}
// Update all information except timeBegan and timeEnded
deltaPosition = touch.deltaPosition;
deltaTime = touch.deltaTime;
phase = touch.phase;
position = touch.position;
rawPosition = touch.rawPosition;
tapCount = touch.tapCount;
}
private bool GetExistingTouch(TouchPt touch, out TouchPt existingTouch)
{
int index = FindIndex(_tempTouchList, touch.fingerId);
if (index != -1)
{
existingTouch = _tempTouchList[index];
_tempTouchList.RemoveAt(index);
return(true);
}
index = FindIndex(_lingeringTouchPts, touch.fingerId);
if (index != -1)
{
existingTouch = _lingeringTouchPts[index];
_lingeringTouchPts.RemoveAt(index);
return(true);
}
// Didn't have a match on fingerId. Try to match position up with any
// lingering touches
// Start with bestDistance set to the maximum allowable
float maxDistance = MultiselectEventSystem.current.MaxDoubleClickDistancePixels;
float bestDistance = maxDistance * maxDistance;
int bestIndex = -1;
for (int i = 0; i < _lingeringTouchPts.Count; i++)
{
float sqrDistance = (_lingeringTouchPts[i].position - touch.position).sqrMagnitude;
if (sqrDistance < bestDistance)
{
bestDistance = sqrDistance;
bestIndex = i;
}
}
if (bestIndex != -1)
{
existingTouch = _lingeringTouchPts[bestIndex];
_lingeringTouchPts.RemoveAt(bestIndex);
return(true);
}
existingTouch = default(TouchPt);
return(false);
}
protected void EvaluateRelativeMotion(MultiTouchPointerEventData eventData)
{
NumInward = 0;
NumOutward = 0;
NumOffAxisCW = 0;
NumOffAxisCCW = 0;
NumMatchCentroid = 0;
NumAntiCentroid = 0;
NumNearCenter = 0;
DeltaPinch = Vector2.zero;
DeltaRotate = 0;
float clusterRadius = eventData.touchCluster.Radius;
Vector2 centroidDelta = eventData.centroidPosition - GestureData.PriorCluster.Centroid;
foreach (var entry in eventData.touchCluster.Touches)
{
TouchPt currentTouch = entry.Value;
TouchPt normalizedPriorTouch;
if (NormalizedPriorCluster.Touches.TryGetValue(entry.Key, out normalizedPriorTouch))
{
float dot;
Vector2 rawMove = currentTouch.position - GestureData.PriorCluster.Touches[currentTouch.fingerId].position;
if (rawMove.sqrMagnitude > 0.5f)
{
dot = Vector2.Dot(centroidDelta.normalized, rawMove.normalized);
if (Mathf.Abs(dot) >= (1.0f - DragTollerance))
{
NumMatchCentroid++;
}
else
{
NumAntiCentroid++;
}
}
Vector2 fromCentroid = eventData.touchCluster.GetRelativeTouchVector(entry.Key);
if (!Mathf.Approximately(clusterRadius, 0f))
{
if (fromCentroid.magnitude / clusterRadius < CloseToCenterRatio)
{
NumNearCenter++;
}
}
Vector2 delta = currentTouch.position - normalizedPriorTouch.position;
float deltaMagnitude = delta.magnitude;
dot = Vector2.Dot(fromCentroid.normalized, delta.normalized);
float absDot = Mathf.Abs(dot);
if (1.0f - absDot < PinchTollerance)
{
if (dot > 0)
{
NumOutward++;
DeltaPinch += delta.Abs();
}
else
{
NumInward++;
DeltaPinch -= delta.Abs();
}
}
else if (absDot < RotateTollerance)
{
float dotPerp = Vector2.Dot(fromCentroid.Perp(), delta);
if (dotPerp < 0)
{
NumOffAxisCW++;
DeltaRotate += deltaMagnitude / fromCentroid.magnitude;
}
else
{
NumOffAxisCCW++;
DeltaRotate -= deltaMagnitude / fromCentroid.magnitude;
}
}
}
}
if (NumOffAxisCCW > 0 || NumOffAxisCW > 0)
{
DeltaRotate = Mathf.Atan2(DeltaRotate, 1f) * Mathf.Rad2Deg;
if (DeltaRotate > 180f)
{
DeltaRotate -= 360f;
}
}
}
public void AddTouch(TouchPt touch)
{
_touchPoints.Add(touch);
}
private bool IsTouchToFind(TouchPt t)
{
return(t.fingerId == _touchToFind);
}