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Question by mycar11 · Oct 10, 2015 at 01:16 PM · unity 52djavascriptcollision2dlayercollision

Destroying a projectile on collision

So, i'm try to make a projectile destroy itself once it collides with anything. I use this code but because of my character's own collider the projectile would instantly destroy itself:

 #pragma strict
 
 function Update () {
     if (Collision2D()){
         Destroy(gameObject);
     }
 }

I then added collision layers and added this code:

 #pragma strict
 
 function Update () {
     if (Collision2D() && Collision.gameObject.layer == LayerMask.NameToLayer("default")){
         Destroy(gameObject);
     }
 }

However, this gives me this error: "Assets/CollisionDestroy.js(4,36): BCE0020: An instance of type 'UnityEngine.Collision' is required to access non static member 'gameObject'."

I don't know what this means as i'm just learning the engine and haven't been able to find anything. Any help would be appreciated.

Side note: This script is attached to the projectile and the projectile has a rigidbody 2D without gravity and a circle collider 2D.

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Answer by brazmogu · Oct 10, 2015 at 03:06 PM

Instead of checking for collision on Update(), you should use OnCollisionEnter instead.

Also, make sure the object has a RigidiBody attached, or the collision might not register for the game object.

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avatar image mycar11 · Oct 11, 2015 at 12:14 AM 1
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Thanks for the help! I had to change it to OnCollisionEnter2D since it was in 2D but otherwise it worked. As a note for anyone else, you'll have to change the "Layer Collision $$anonymous$$atrix" if you want to have it pierce anything.

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