How to expose UNavigationSystem::OnNavigationBoundsUpdated?

ArthurRodrigues · June 30, 2016, 3:42pm

Hi guys, I’m making a procedual map that uses navmesh, Ive set the “Force Rebuild on Load” to true, so it rebuild when I move the blueprint, but it doest rebuild when I compile it, so I seached here and found this post:

But the solution they found is to expose UNavigationSystem::OnNavigationBoundsUpdated

So I searched it and didnt find how to do it, does anyone here knows?

PS: I only found this link: https://docs.unrealengine.com/latest/INT/API/Runtime/Engine/AI/Navigation/UNavigationSystem/OnNavigationBoundsUpdated/index.html

PS2: sorry for my bad english, it’s not my native language

medwil · July 31, 2025, 3:34pm

Hey,
For anyone coming here in the future, I have the solution.

I had exactly the same problem. I generate the world procedurally in my game, and the standard max limit size for a single NavMeshBounds volume does not work for me.

So I went through all the nodes in UE5.5.4 regarding navigation and found that you can globally access ‘get navigation system’ and then call On navigation Bounds Updated after moving your NavMeshBounds.

Just place a few ‘NavMeshBoundsVolumes’ in the game and move them around. I believe these can be referenced only in the level blueprint.

This code is in level blueprint.

Result: