Avoiding Friendly Fire (Collisions, Layers, etc)

Unity Engine
1

It’s a simple question (maybe a bit broader than the other discussions in scripting) but I couldn’t find it by googling. Let’s say I’m making a multiplayer 4v4 team fps. How would I avoid damaging my own teammates? I considered putting an “enemy” tag on all enemies but since it’s multiplayer, I don’t think this will work. Another idea I had was to use layer-based collisions like so:

  • Team1 players and Team2 bullets on Layer1
  • Team1 bullets and Team2 players on Layer2

I’d still have to check which players are on which layer though. Is there any better way to do this?

2

The physics engine has a built-in layer matrix which you can access in Edit > Project Settings > Physics. You can read more on Layer Based Collision Detection here.