How do is make Unity 8-way swipe touch control code

 public class InputController : MonoBehaviour{
 
 private Vector2 fp;  // first Touch
 private Vector2 Lp;  // last touch
 
 private int Xdistance;
 private int Ydistance;
 
 private float distance;
 
 
 
 
 void Start(){
 distance=screen.height * 15 / 100;
 }
 
 void Update(){
 
 if(Input.touchCount==1){
     Touch touch= Input.GetTouch(0);
     if(touch.phase==TouchPhase.Began){
           fp=touch.position;
           lp=touch.position;
     }
     else if(touch.phase==TouchPhase.Moved){
                 lp=touch.position;
     }
     else if(touch.phase==TouchPhase.Ended){
                lp=touch.position;
                if( Math.Abs(lp.x-fp-x) > distance )
                {
                     if(fp.x-lp.x>0)
                     {
                           Xdistance=1;  
                     }
                     
                     else
                     {
                     Xdistance=-1;
                     }
                }
                if(Math.Abs(lp.y-fp.y)>distance)
                {
                     if( lp.y-fp.y > 0)
                     {
                     Ydistance=1;
                     }
                     else
                     {
                     Xdistance=-1;
                     }           
                }
                
                if(Xdistance==1 && Ydistance==1)
                {
                     Debug.log("SwipeUpLeft");
                }
                else if(Xdistance==-1 && Ydistance==1)
                {
                     Debug.log("SwipeUpRight");
                }
                else if(Xdistance == 1 && Ydistance == -1)
                {
                   Debug.log("SwipeDownLeft");
                }
                else if(Xdistance == -1 && Ydistance == -1)
                {
                   Debug.log("SwipeDownRight");
                }
                else if( Xdistance < 0)
                {
                   Debug.log("SwipeRight");
                }
                else if(Xdistance > 0 )
                {
                   Debug.log("SwipeLeft");
                }
                else if(Ydistance < 0 )
                {
                   Debug.log("SwipeDown");
                }
                else if(Ydistance > 0 )
                {
                   Debug.log("SwipeUp");
                }
                else
                {
                Debug.log("Tap");
                }
               
       }         
      }          
   }//update
 }//class