How to use raycast in screen space camera

Question

Hello everyone,

I use raycasts like this:

hit = Physics2D.Raycast(Input.mousePosition, Cible, 10f,9); hitsX = Physics2D.RaycastAll(Input.mousePosition, Vector3.right, 600); hitsY = Physics2D.RaycastAll(Input.mousePosition, Vector3.right, 600);

and it's work very well. But now i changed my canvas for Screen Space camera and it's doesn'work anymore. Only this kind of raycast works but i don't need this:

Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);

         if (Physics.Raycast(ray, out raycastHit))
         {
             
                 Debug.Log(raycastHit.collider.gameObject.name);
            
         }

Can you help me?

Thank you.

Answer 1

Answer by bsivy · Dec 08, 2020 at 02:11 PM

I had a similar issue when switching from screen space - overlay to screen space - camera. Not the same code but this is how I solved it:

 // Vector3 position = Input.mousePosition;
 
 if (_canvas.renderMode == RenderMode.ScreenSpaceCamera)
 {
     position = cam.WorldToScreenPoint(position);
 }
 
 _pointerEventData = new PointerEventData(_eventSystem) { position = position };
 
 List<RaycastResult> results = new List<RaycastResult>();
 
 _raycaster.Raycast(_pointerEventData, results);

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perf401 · Jan 04 at 04:06 PM 0

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Amazing, thanks. Just adding WorldToScreenPoint solved my problem.

ABerlemont · Mar 31 at 03:29 PM 0

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What position do you give to WorldToScreenPoint (Mouse position is not in world coordinate) ? What is _raycaster here ? What is doing the PointerEventData ?

How to use raycast in screen space camera

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