Camera Lerp似乎在递增每个循环

Question

我想要迭代7个位置，它们在x轴上都有4.5的差异，因此Position0 = 0，Position1 = 4.5＆amp;位置= 9，依此类推。

但是，当我从Position0转到Position1时，x似乎继续增长4.5。迭代通过数组工作，但它每帧增加4.5。我做错了什么？

    void Start () {
 _positionArray[0] = position0;
 _positionArray[1] = position1;
 _positionArray[2] = position2;
 _positionArray[3] = position3;
 _positionArray[4] = position4;
 _positionArray[5] = position5;
 _positionArray[6] = position6;
 endPosition = position0;
}

public void changeDestination() 
{
if (_leapManager.swipePerformed)
{
  swipeDirection = _leapManager.swipeDirection;
  if (swipeDirection == "left" && posInArray >= 0 && posInArray < 5)
  {
    Debug.Log("called");
    posInArray++;
    endPosition.position = _positionArray[posInArray].position;
  }
  else if (swipeDirection == "right" && posInArray <= 5 && posInArray > 0)
  {
    posInArray--;
    endPosition.position = _positionArray[posInArray].position;
  }
}
}

// Update is called once per frame
void Update () {
transform.position = Vector3.Lerp(transform.position, endPosition.position, speed * 3.0f * Time.deltaTime);
}