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Question by Rocketman1703 · Aug 20, 2017 at 03:07 PM · programmingoncollisionenter

C# OnCollisionEnter2D failing to respond

Hello fellow unity patrons, I know this question has been asked before, but here we go. I want my 2D tank to take damage upon collision with barbed wire. on the tank i'm using a simple piece of code:

Void OnCollisionEnter2D(Collision2D col) { if(col.gameObject.tag == "BarbedWire") { Health--; } }

Like i said, should be very simple. The Tank has a Rigidbody and a polygon collider2D. The barbed wire has a polygon collider2D (IsTrigger false). I have tried attaching a script to the BarbedWire to nudge it ever so slightly to keep the collider working. I have looked through every place i could find for the answer, but none have fixed it. it simply does not register that it collided with the BarbedWire.

Thanks in advance, Rocketman.

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avatar image SneakyLeprechaun · Aug 21, 2017 at 02:33 AM 0
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Is the Rigidbody 2D?

avatar image Rocketman1703 SneakyLeprechaun · Aug 21, 2017 at 12:29 PM 0
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Yes, the rigid body is 2D. I should have stated that, but you can't (at least in 2017.1) have a rigid body 3D and a 2D collider

Thanks for the quick response!

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Answer by BreakTheWInd · Jan 14, 2018 at 02:15 PM

If the collider is on a child and the OnCollision is on the parent, try adding the following code to the child:

  void OnCollisionEnter2D(Collision2D collision)
  {
      transform.parent.gameObject.SendMessage("OnCollisionEnter2D", collision);
  }


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