Disable all collisions but one?

Archived Forums Questions & Answers
1

Is it possible to turn off all collisions for one object except with just one other object? I.e. I want object A to only collide with object B and nothing else in the scene.

I’m looking for something like:

Physics.IgnoreCollision(objectA, all);
Physics.IgnoreCollision(objectA, objectB, false);

2 Answers

2
2

you can use the layer and the “Layer collision matrix” in Edit=>projetc setting=>physics

That forces me to create a special layer just for this one object, right? Not a very good solution.

 –

you still have 30 other :D. I don't see any other solution...

 –

What if I have 50 such objects? :P But thx for trying. It's possible that, once again, unity just sux. :P

 –
3

Only Alternatice I could think of is using the OnCollisionEnter() or OnTriggerEnter() functions…
You could check the game object’s tag in case you don’t want to go for layers, but it’s similar.