compass GUI jumps at angle 180.

Hello Everyone,

I have a script that I use for a compass. The problem is, that once the angle reaches close to 180, it jumps down to 0 or a negative value. so the compass only points correctly on one half of the screen.

Would someone be kind enough to take a look and point out where I went wrong with this?

Thank you very much!

     var tex : Texture2D;       // Texture to be rotated
     var goFollow :GameObject; // GameObject to point to
     var width :float;
     var height : float;
      var angle: float = 0;
      var pos : Vector2 = new Vector2(0, 0);
      var rect : Rect;
      var pivot : Vector2;
     
     function Start()
     {
         if (tex == null)
         {
             Debug.Log ("Texture or game object to follow is null");
         }
         pos = new Vector2(transform.localPosition.x, transform.localPosition.y);
         rect = new Rect(Screen.width/width, Screen.height/height, 50, 100);
         pivot = new Vector2(rect.xMin + rect.width * 0.5f, rect.yMin + rect.height * 0.5f);
     }
     
     
     function OnGUI() 
     {
         var guiPos : Vector2 = Camera.main.WorldToScreenPoint(goFollow.transform.position);
         guiPos.y = Screen.height - guiPos.y;
         var v2T : Vector2 = guiPos - pivot;   
         angle = (Mathf.Atan2 (v2T.y, v2T.x))  * Mathf.Rad2Deg;
         
         var matrixBackup : Matrix4x4 = GUI.matrix;
         GUIUtility.RotateAroundPivot(angle, pivot);
         GUI.DrawTexture(rect, tex);
         GUI.matrix = matrixBackup;
     }