what's the perf impact of enabling and disabling triggers?

Unity Engine
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1

wondered if physx still rebuilds the entire world graph when that’s done
and if so, what’s the best way to disable a trigger?

2

I haven’t tested this explicitly ( @yant could reply better to this), but I have a case where I need to disable and re-enable actual colliders in each frame for certain queries. The method I use is changing the layer in these colliders, run the queries, then restore the original layer. The same approach may be used with triggers. As for what I can tell, this method is essentially free.

1 Like
3

interesting method, I just freed up a layer so I might try that.
do you know what the overhead would look like in the profiler?

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4

I don’t think that changing layers would even appear in the profiler. It’s just changing a flag.

5

What about the overhead of turning on and off the collider? How do these things show up on the profiler?