Why smoothdamp can not work with TouchPhase.Ended?

Questions & Answers
1

I am not sure it’s my code problem or the way I am using it is not correct. But I found the Vector3.SmoothDamp works fine under Update(). Here are my code, anyone can tell me what’s going on?
public class TouchInputSwipeFlick4 : MonoBehaviour
{

public float speed=1.5f;

private float currentObjPosX;
private Vector2 touchDeltaPosition;

public float smoothSpeed=0.1f;
public float smoothTime = 0.3F;

private float goalPos;


void Update () 
{
	currentObjPosX = transform.position.x;
	goalPos = Mathf.Round(transform.position.x/25)*25;
			
	if(Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Moved) 
	{
		// Get movement of the finger since last frame
		touchDeltaPosition = Input.GetTouch(0).deltaPosition;
    	
		//P0 to Start Page
		if (currentObjPosX>0 && touchDeltaPosition.x>0)	GoStart();
		
		//PEnd to Start Page
		if (currentObjPosX<-350 && touchDeltaPosition.x<0)	GoStart();
		
		// Move object across XY plane by controling the speed, in this case, we are moving the camera
		if (currentObjPosX<=0 && currentObjPosX>=-350)	//need to be >=-225 otherwise >-225 will let user "stock at that page)
			transform.Translate (touchDeltaPosition.x*speed*Time.deltaTime,0,0);
		
	}
	
	if(Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Ended)
	{
		transform.position = Vector3.Lerp(transform.position, new Vector3(goalPos, 0, 0) , Time.time*smoothSpeed);
	}
	
	
	
}

Thanks

2

TouchPhase.Ended is called only once. For smoothdamp to work it has to be called continuously until it reaches the destination.

Use a bool variable and then call it from Update().

bool doSmoothDamp;

void Update()
{
    if(doSmoothDamp)
    {
         // smoothdamp code here
    }
 
    if(Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Ended)
    {
        doSmoothDamp = true;
    }
}