Diagonal swipe issues on Android

Hi,

I'm using MNOGUE's code for detecting 8-way swipe (including diagonals, vertical and horizontal). The problem is, sometimes the diagonal swipes are not detected, and vertical or horizontal swipes happen instead. What can I do to this code to possibly improve the diagonal swipe response? Thanks in advance.

Here's the code:

 private float fingerStartTime  = 0.0f;
 private Vector2 fingerStartPos = Vector2.zero;
 
 private bool isSwipe = false;
 private float minSwipeDist  = 30.0f;
 private float maxSwipeTime = 0.5f;
 
 
 void Update()
 {
 
 if (Input.touchCount > 0 && Time.timeScale > 0.0f) 
             {
             
                 foreach (Touch touch in Input.touches) 
                 {
 
                     switch (touch.phase) 
                     {
 
                     case TouchPhase.Began:
                         /* this is a new touch */
                         isSwipe = true;
                         fingerStartTime = Time.time;
                         fingerStartPos = touch.position;
                         break;
                 
                     case TouchPhase.Canceled:
                         /* The touch is being canceled */
                         isSwipe = false;
                         break;
                 
                     case TouchPhase.Ended:
                     
                         float gestureTime = Time.time - fingerStartTime;
                         float gestureDist = (touch.position - fingerStartPos).magnitude;
                         
                         if (isSwipe && gestureTime < maxSwipeTime && gestureDist > minSwipeDist)
                         {
 
                             Vector2 direction = touch.position - fingerStartPos;
                             //Vector2 swipeType = Vector2.zero;
                             int swipeType = -1;
                             if (Mathf.Abs(direction.normalized.x) > 0.8)
                             {
 
                                 if (Mathf.Sign(direction.x) > 0) swipeType = 0; // swipe right
                                 else swipeType = 1; // swipe left
                             
                             }
                             else if (Mathf.Abs(direction.normalized.y) > 0.8)
                             {
                                 if (Mathf.Sign(direction.y) > 0) swipeType = 2; // swipe up
                                 else swipeType = 3; // swipe down
                             }
                             else
                             {
                                 // diagonal:
                                 if (Mathf.Sign(direction.x) > 0)
                                 {
 
                                     if (Mathf.Sign(direction.y) > 0) swipeType = 4; // swipe diagonal up-right
                                     else swipeType = 5; // swipe diagonal down-right
                                 
                                 }
                                 else
                                 {
 
                                     if (Mathf.Sign(direction.y) > 0) swipeType = 6; // swipe diagonal up-left
                                     else swipeType = 7; // swipe diagonal down-left
                                 
                                 }
                             
                             }
 
                             switch(swipeType)
                             {
 
                                 case 0: //right
                                     
                                                                         break;
   
                             
                                 case 1: //left
                                     
                                     break;
 
                                 case 2: //up
                                     
                                     break;
 
                                 case 3: //down
                                     
 
                                 case 4: //up right
                                     
 
                                 case 5: //down right
                                 
                                     break;
 
                                 case 6: //up left
                                 
                                     break;
 
                                 case 7: //down left
                                 
                                     
                                     break;
                             
                             }
 
                         }
 
                         break;
                 
                     }
             
                 }
         
             }
 }