Help with Raycast?

Unity Engine
1

I’ve been trying to make my Player able to kill enemies using a Raycast (previously I used collision detection), however the code I tried using isn’t working. The enemies are not on IgnoreRaycast, and the code I am using is nearly identical to a string of previous, working code. Any ideas on how I might be messing up?

  void PlayerRaycast() {
        RaycastHit2D hit = Physics2D.Raycast(transform.position, Vector2.down);

        if (hit.distance < 1f && hit.collider.tag == "enemy") {
            Debug.Log("enemy_dead");
            Destroy(hit.collider,);
        }
    }

Thanks for any suggestions!

2

So, what’s wrong? Do you have errors in the console? Does it ever work?
When do you call this method?

It looks as though the ‘Destroy’ method has a common that is out of place.
You should check that hit isn’t null before using it.
You can include the distance in the raycast itself, as opposed to checking it afterwards.
You can use CompareTag which is better than ‘==’
You probably want to destroy the ‘hit.gameObject’ if successful, yes? Rather than the collider?

Those are some suggestions that come to mind, but without a bit more information, I’m not sure what to say.

3

Sorry for not making things clearer.
I do not get any errors, nor does the Debug display anything.
The method has not worked yet.
I call the method every frame.

4

I would try to maybe do:

RaycastHit2D hit = Physics2D.Raycast(transform.position, Vector2.down);
if(hit.collider != null) print("hit this: " + hit.gameObject.name);

Just see if that even works.

Make sure the tag is spelled correctly, capitalization, etc… after in another test?

5

The only message displayed during gameplay was “hit this: player”

6

I see, so you’re hitting yourself instead. Perhaps your ray is coming from the middle of the player?
Like if you do a debug draw ray or line from the position, can you see where it begins? Maybe you have to adjust it so it’s from the bottom?

7

Thank you so much!
I changed
“RaycastHit2D hit = Physics2D.Raycast(transform.position, Vector2.down);”
to
“RaycastHit2D hit = Physics2D.Raycast(transform.position + new Vector3(0f, -0.5f, 0f), Vector2.up);”
and it fixed my problem.

8

Cool, I’m glad it’s working for you. :slight_smile: I was thinking an offset might help, after your last post.

Though, I’m curious to ask why did the direction change? Had you always wanted up before or something else? :slight_smile:

9

I was trying things out with the debug. Now though when I change it back to down my player doesn’t move at all, so I’m not really sure what happened.

10

Also, I was wondering if there is a way to keep the raycast always down? When my player rotates, so does the raycast, and if it isn’t down then he dies instead of killing the enemy.

11

The code I see here should always be down, even if you rotate, I think.

Is there some other code that you think is going in another direction?

12

Thanks again for all the help. My problem was that I had it set to Vector2.up
(transform.position + new Vector3(0f, -0.3f, 0f), Vector2.up);
and replaced it with Vector3.up.
(transform.position + new Vector3(0f, -0.3f, 0f), Vector3.up);

13

Alright, that still didn’t quite make me understand, but so long as it’s working for you! :slight_smile: :slight_smile: