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Question by goutham12 · Feb 14, 2018 at 07:37 AM · touchdrag

Get drag distance with touch

check the below code. there am taking the distance of dragging finger. but am getting always zero what am doing wrong here.

 int fingerNO = 0;
 Vector2 touchInitialPos,touchCurrentPos;
 
 void  OnMobile ()
 {
     for (int i = 0; i < Input.touchCount; i++) {

         Touch touch = Input.GetTouch (i);
         Vector3 pos = touch.position;


         if (touch.phase == TouchPhase.Began) {
             Vector2 worldPoint = Camera.main.ScreenToWorldPoint (pos);
             RaycastHit2D hit = Physics2D.Raycast (worldPoint, Vector2.zero, 1, 1 << LayerMask.NameToLayer ("dragable"));

             if (hit.collider != null && hit.transform == this.transform) {
                 drag = true;
         
                 
                     var p = Camera.main.ScreenToWorldPoint (touch.position);
                     touchInitialPos = p;
                     
                 
                 fingerNO = touch.fingerId;
             }
         }

         if (drag && touch.fingerId == fingerNO && touch.phase == TouchPhase.Moved) {
             // do drag
             
             
             var p = Camera.main.ScreenToWorldPoint (touch.position);
             touchCurrentPos = p;
             length = Vector2.Distance (touchInitialPos, touchCurrentPos);
             
         }

         if (drag && touch.fingerId == fingerNO &&  (touch.phase == TouchPhase.Ended || touch.phase == TouchPhase.Canceled)) {
             drag = false;
         }
     }


 }
 void OnGUI(){
     GUI.Label (new Rect (100, 250, 100, 100), "" + length);
 }
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