Collision detection on all children of empty parent

Question

I have a spaceship that is a sum of components, such as hull, engine, guns, etc. These are all children of an empty PlayerShip object. How do I detect collision on the player's ship all at once, without handling collision for each ship component?

Answer 1

Best Answer

Answer by Kryptos · Nov 06, 2012 at 02:29 PM

Add a rigidbody component to the parent (PlayerShip) GameObject. All collision will then be caught by this object. This is what UT call compound colider.

See Rigidbody (documentation)

Add comment · Show 2 · Share

Will M · Nov 06, 2012 at 06:58 PM 0

Share

Thanks, thats what I was missing, I didn't realize i needed a rigidbody on the empty object.

Will M · Nov 06, 2012 at 07:42 PM 0

Share

I'm still having trouble getting the compound collider to work. http://imgur.com/a/Tddso#0 is an album of what my setup looks like. It might be poorly set up and that is causing problems, I dunno.

Answer 2

Answer by Owen-Reynolds · Nov 06, 2012 at 01:07 AM

Just check for collision the usual way (script on the parent.) All the child colliders count as one big collider on the parent.

Add comment · Show 2 · Share

Will M · Nov 06, 2012 at 06:33 AM 0

Share

I'm trying to do this code Physics.IgnoreCollision(clone.collider, transform.root.collider); where clone is the laser and transform.root is the empty playership object, but I get this error:

$$anonymous$$issingComponentException: There is no 'Collider' attached to the "PlayerShip" game object, but a script is trying to access it. You probably need to add a Collider to the game object "PlayerShip". Or your script needs to check if the component is attached before using it.

Kryptos · Nov 06, 2012 at 07:52 PM 0

Share

You should not use IgnoreCollision but set the collision layers properly so that your bullet does not interact with your gun.

Collision detection on all children of empty parent

2 Replies

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions