2d raycasting to touch position not working

Question

 void Update()
     {
         for ( int i = 0; i<Input.touchCount; i++)
         {
             if (Input.GetTouch(i).phase == TouchPhase.Began)
             {
                 Touch touch = Input.GetTouch(i);
                 Vector3 touchposition = Camera.main.ScreenToWorldPoint(touch.position);
                 RaycastHit2D hit = Physics2D.Raycast(touchposition,touchposition);
                 Debug.DrawRay(touchposition, touchposition);
                 if (hit.collider)
                 {
                     Debug.Log(hit.transform.name);
                    
                 }
             }
 
         }
     }

Answer 1

Best Answer

Answer by motazmmnshob · Jan 06, 2021 at 07:38 PM

Finally I got it working :

   void Update()
     {
      
         foreach (Touch touch in Input.touches)
         {
             //Detects Swipe while a finger touched the screen
             if (touch.phase == TouchPhase.Began)
             {
 
                 Ray touchposition = Camera.main.ScreenPointToRay(new Vector3(touch.position.x, touch.position.y, 0f));
                 RaycastHit2D hit = Physics2D.GetRayIntersection(touchposition);
                 
                 if (hit.collider)
                 {
                     Debug.Log(hit.transform.name);
 
                 }
             }

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Javets23 · Mar 24 at 10:21 PM 0

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update or fixedUpdate for touch input? Lets say it is a ui element in a fixed position could you possibly get away with it in update if thats the case?

Answer 2

Answer by RageEye · Jan 06, 2021 at 03:35 PM

do it in foreach:

     foreach (Touch touch in Input.touches)
             {
                 //Detects Swipe while a finger touched the screen
                 if (touch.phase == TouchPhase.Began)
                 {
                               
                 }
                 //Detects Swipe while finger is still moving
                 if (touch.phase == TouchPhase.Moved)
                 {
 
                 }
     
                 //Detects swipe after finger is released
                 if (touch.phase == TouchPhase.Ended)
                 {
                    
                 }
             }

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motazmmnshob · Jan 06, 2021 at 06:00 PM 0

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I am having a problem with the raycasting it self it is not starting from the touch position and it always start from the same place no matter where I touch on my phone(using unity remote5) and I tried doing it in foreach

Answer 3

Answer by Javets23 · Mar 24 at 10:20 PM

wait are you sure it is supposed to be in Update() instead of fixedUpdate?

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2d raycasting to touch position not working

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