Raycasting from camera doesn't work.

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1

Hi!! I’m trying to send a Raycast from the position on which the finger touch the screen but until now i have failed completely :confused:
Any tips/help/NonUnityofficial documentation that you can spare with me?
It is a 2D game and the future idea is to grab a position and send a gameobject to it … like a touch-to-move kinda game. (It is not a sidescroller)
What i have now:

if (Input.touchCount > 0 && Input.GetTouch (0).phase == TouchPhase.Began) 
		{
			Ray ray = Camera.main.ScreenPointToRay( Input.GetTouch(0).position );
			RaycastHit hit;
			
			if ( Physics.Raycast(ray, out hit))
			{
				Debug.Log("something is hitted");  
			}
		}

Pretty basic code but it doesn’t work … is it because it’s a 3D code on a 2D enviroment(?)

1 Answer

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Well, you kind of answered yourself. If you’re making a 2D game you’re probably using 2D colliders, so you need a 2D raycast: Unity - Scripting API: Physics2D.Raycast

Note it’s Physics 2D .Raycast.

Oh well Thanks! =) xP :Ankward moment:

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Hey @DiegoSLTS I added the correct fixes as you indicated .. but i got some errors .. and after a little research i discovered that i must pass it a Vector2 argument ... Where should it be? Right now i have it on if (Physics2D.Raycast(ray, out hit, Vector2.zero) { } But that gives me errors ... I also tried with the vector2 argument outside of the brackets but it's the same ...

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No worries!! I got it!! xP Here the entire script!! xO void Update(){ if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began) { RaycastHit2D hit = Physics2D.Raycast (Camera.main.ScreenToWorldPoint(Input.GetTouch(0).position), Vector2.zero); if(hit.collider.tag == "//someObject"){ Debug.Log("//someObjectisHitted"); Debug.DrawLine(Input.GetTouch(0).position, hit.point, Color.green, 50); } }

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