void UpdateFingers()
{
touches.Clear();
// update all fingers
foreach (Finger finger in fingers)
{
Vector2 pos = Vector2.zero;
FingerPhase phase = GetPhase(finger);
if (phase != FingerPhase.None)
{
pos = GetPosition(finger);
}
finger.Update(phase, pos);
if (finger.IsDown)
{
touches.Add(finger);
}
}
// post-update
foreach (Finger finger in fingers)
{
finger.PostUpdate();
}
}
internal void Update(bool newDownState, Vector2 newPos)
{
// stop ignoring this touch when the finger is no longer touching the screen
if (filteredOut && !newDownState)
{
filteredOut = false;
}
// Apply global touch filter on new touches
if (!IsDown && newDownState && !FingerGestures.instance.ShouldProcessTouch(index, newPos))
{
filteredOut = true;
newDownState = false;
}
// process touch
prevPhase = phase;
if (newDownState)
{
// new touch? reset finger state
if (!WasDown)
{
phase = FingerPhase.Begin;
pos = newPos;
startPos = pos;
prevPos = pos;
deltaPos = Vector2.zero;
moved = false;
lastMoveTime = 0;
startTime = Time.time;
elapsedTimeStationary = 0;
}
else
{
prevPos = pos;
pos = newPos;
distFromStart = Vector3.Distance(startPos, pos);
deltaPos = pos - prevPos;
if (deltaPos.sqrMagnitude > 0)
{
lastMoveTime = Time.time;
phase = FingerPhase.Moving;
}
else if (!IsMoving || ((Time.time - lastMoveTime) > 0.05f)) // allow for a small time buffer after we stopped moving
{
phase = FingerPhase.Stationary;
}
if (IsMoving)
{
// finger moved at least once
moved = true;
}
else
{
if (!WasStationary) // begin a new stationary phase
{
elapsedTimeStationary = 0;
}
else
{
elapsedTimeStationary += Time.deltaTime;
}
}
}
}
else
{
phase = FingerPhase.None;
}
}
internal void Update(FingerPhase newPhase, Vector2 newPos)
{
// validate phase transitions
if (phase != newPhase)
{
// In low framerate situations, it is possible to miss some input updates and thus
// skip the "Ended" phase
if (newPhase == FingerPhase.None && phase != FingerPhase.Ended)
{
Debug.LogWarning("Correcting bad FingerPhase transition (FingerPhase.Ended skipped)");
Update(FingerPhase.Ended, PreviousPosition);
return;
}
// cannot get a Moved or Stationary phase without being down first
if (!down && (newPhase == FingerPhase.Moved || newPhase == FingerPhase.Stationary))
{
Debug.LogWarning("Correcting bad FingerPhase transition (FingerPhase.Began skipped)");
Update(FingerPhase.Began, newPos);
return;
}
if ((down && newPhase == FingerPhase.Began) || (!down && newPhase == FingerPhase.Ended))
{
Debug.LogWarning("Invalid state FingerPhase transition from " + phase + " to " + newPhase + " - Skipping.");
return;
}
}
else // same phase as before
{
if (newPhase == FingerPhase.Began || newPhase == FingerPhase.Ended)
{
Debug.LogWarning("Duplicated FingerPhase." + newPhase.ToString() + " - skipping.");
return;
}
}
if (newPhase != FingerPhase.None)
{
if (newPhase == FingerPhase.Ended)
{
// release
down = false;
}
else
{
if (newPhase == FingerPhase.Began)
{
// activate
down = true;
startPos = newPos;
prevPos = newPos;
startTime = Time.time;
}
prevPos = pos;
pos = newPos;
deltaPos = pos - prevPos;
}
}
phase = newPhase;
}
internal void Update(bool newDownState, UnityEngine.Vector2 newPos)
{
if (filteredOut && !newDownState)
{
filteredOut = false;
}
// 过滤
if (!IsDown && newDownState && !TouchManager.instance.ShouldProcessTouch(index, newPos))
{
filteredOut = true;
newDownState = false;
}
// 处理触摸
prevPhase = phase;
if (newDownState)
{
// 新的触摸，重置手指状态
if (!WasDown)
{
phase = FingerPhase.Begin;
pos = newPos;
startPos = pos;
prevPos = pos;
deltaPos = UnityEngine.Vector2.zero;
moved = false;
lastMoveTime = 0;
startTime = UnityEngine.Time.time;
elapsedTimeStationary = 0;
distFromStart = 0;
}
else
{
prevPos = pos;
pos = newPos;
distFromStart = UnityEngine.Vector3.Distance(startPos, pos);
deltaPos = pos - prevPos;
if (deltaPos.sqrMagnitude > 0)
{
lastMoveTime = UnityEngine.Time.time;
phase = FingerPhase.Moving;
}
else if (!IsMoving || ((UnityEngine.Time.time - lastMoveTime) > 0.05f))
{
// 停止移动之后有一点缓冲时间
phase = FingerPhase.Stationary;
}
if (IsMoving)
{
// 手指至少移动一次
moved = true;
}
else
{
if (!WasStationary)
{
// 开始以后新的静止状态
elapsedTimeStationary = 0;
}
else
{
elapsedTimeStationary += UnityEngine.Time.deltaTime;
}
}
}
}
else
{
phase = FingerPhase.None;
}
}
