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Question by Ipsquiggle · Dec 09, 2010 at 07:44 PM · collisiongameobjectcollidertypecasting

Get the script instance associated with a collider

So I'm still not completely solid on how a GameObject is composed and how to access its various parts.

I have a reference to a Collider, and need to cast it to the type of a script on the same GameObject, but I'm not sure what this would look like.


My scenario looks like this (using C#):

  • Two objects:
    • PlayerPrefab, which has a collider/rigid body, and the Player script.
    • EnemyPrefab, which has a collider/rigid body, and the Enemy script.

Scripts:

public class Player : MonoBehavior {
    public void Kill() { //... }
}

And:

public class Enemy : MonoBehavior {
    void OnTriggerEnter( Collider other ) {
        Player p = (Player)other;  // This does not work!
        p.Kill();
    }
}


So how exactly do I perform that cast in the Enemy script?

Thanks.

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avatar image Ipsquiggle · Dec 09, 2010 at 07:53 PM 0
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Found this similar question which has the same answer: http://answers.unity3d.com/questions/17039/how-to-get-a-script-component-in-c

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Answer by Mike 3 · Dec 09, 2010 at 07:48 PM

Unity uses a composition model - you can access the other components from a gameobject or component using GetComponent. In your case you want something like this:

Player p = other.GetComponent<Player>();

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avatar image Ipsquiggle · Dec 09, 2010 at 07:55 PM 0
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Thanks. I found the answer (posted in a comment on the question) a few minutes after posting this. Yay generics!

avatar image Mike 3 · Dec 09, 2010 at 08:03 PM 0
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Generics are fun! You can also use the non generic version if you're strange like that, Player p = (Player)other.GetComponent(typeof(Player));

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