Collision detection on all children of empty parent

Questions & Answers
1

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?

3

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)

2

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