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Question by Screenhog · Aug 16, 2012 at 05:32 PM · navmeshpathfinding

Dynamic Levels & Navmesh

I'm creating a level by placing prefabs side-by-side (e.g. making a long hallway with a series of floor objects). However, this is being done dynamically... the level is only built at runtime.

I was hoping to use Unity's pathfinding - the prefabs could still be marked NavMesh Static, because they won't move after the initial placement - but it looks like NavMesh can only be baked into the scene, not attached to a prefab. Is Unity's NavMesh even a possibility for me here? If not, are there recommended pathfinding solutions for dynamic levels on the Asset Store? Or do I just have to figure out my own custom pathfinding solution?

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avatar image Screenhog · Aug 16, 2012 at 06:01 PM 0
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Looking at Aron Granberg's A* Pathfinding engine. So far, that's looking like a favorite... any thoughts?

avatar image dchen05 · Feb 08, 2013 at 05:32 AM 0
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I just realized the same thing after building my levelLoader to load prefabs. Facepalm. I will either load them as scenes or try something else.

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Answer by dchen05 · Feb 08, 2013 at 04:45 PM

Hey guys, I found a workaround to this proble, in the last post on this thread:

http://forum.unity3d.com/threads/122545-Problem-with-NavMesh-and-Asynchronous-load

You need to save your navmesh prefab in a scene by itself, then load it in (non additive), but set the game objects in your scene to "Dont destory on load".

Its kinda hacky but it works for now. But overall, I really wish Unity would extend the NavMesh features.

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avatar image Screenhog · Feb 08, 2013 at 05:30 PM 0
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Best answer I've heard so far. Accepted.

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Answer by hippocoder · Dec 10, 2012 at 05:54 AM

Same problem cropped up for us. But nobody will read this who works at unity.

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Answer by anthonyk2 · Aug 18, 2012 at 11:33 AM

I have exactly the same problem :/. I can't understand why it's not possible to prefab the Navmesh to reuse it! It's like a basic feature to me. The lightmap baking is working fine with prefabs so I expected that the Navmesh baking was at least working the same way !

In fact, I have to revert back to previous solutions like http://angryant.com/path/

I hope that Unity 4 will enable that feature.

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Answer by gekidoslair · Feb 21, 2013 at 08:15 PM

same problem exists with unity 4. ridiculous.

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Answer by Fratyr · Mar 12, 2013 at 08:35 PM

Gah. Hoped they fixed it... Well, they have to force us pay money for assets right? So go and buy Aron's asset for $100 :-/

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