unity swipe script code example

Example: unity swipe

//inside class
Vector2 firstPressPos;
Vector2 secondPressPos;
Vector2 currentSwipe;
 
public void Swipe()
{
     if(Input.touches.Length > 0)
     {
         Touch t = Input.GetTouch(0);
         if(t.phase == TouchPhase.Began)
         {
              //save began touch 2d point
             firstPressPos = new Vector2(t.position.x,t.position.y);
         }
         if(t.phase == TouchPhase.Ended)
         {
              //save ended touch 2d point
             secondPressPos = new Vector2(t.position.x,t.position.y);
                           
              //create vector from the two points
             currentSwipe = new Vector3(secondPressPos.x - firstPressPos.x, secondPressPos.y - firstPressPos.y);
               
             //normalize the 2d vector
             currentSwipe.Normalize();
 
             //swipe upwards
             if(currentSwipe.y > 0  currentSwipe.x > -0.5f  currentSwipe.x < 0.5f)
             {
                 Debug.Log("up swipe");
             }
             //swipe down
             if(currentSwipe.y < 0  currentSwipe.x > -0.5f  currentSwipe.x < 0.5f)
             {
                 Debug.Log("down swipe");
             }
             //swipe left
             if(currentSwipe.x < 0  currentSwipe.y > -0.5f  currentSwipe.y < 0.5f)
             {
                 Debug.Log("left swipe");
             }
             //swipe right
             if(currentSwipe.x > 0  currentSwipe.y > -0.5f  currentSwipe.y < 0.5f)
             {
                 Debug.Log("right swipe");
             }
         }
     }
}