Getting the Ai to avoid obstacles

Development Programming & Scripting AI
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1

I’m using a crowd AI to for RTS units and they are moving around fine, clumping up a bit, but generally fine.
That is until I introduce obstacles to the level. For some reason they don’t seem to be able to pathfind around a blocking object.

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The navmesh is build and should tell them that they can’t move up to that obejct. But it’s like they completely igorne it.
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What am I doing wrong here? I know I can weight areas to give the AI directions as to what is a good path and not. But I mean, that’s not something I can do for every rock and tree in my level.

2

Hi Emil
What type of Ai controller are you using exactly?
Are you using Ai behavior tree? if yes what node are you using for command ai to move?

3

I’m using a Detour Crowd AI Controller and I’m using a behavior tree to move the ai, and a a black board value to give them specific orders.

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The behavior tree is still a mess as I haven’t gotten my head around how it works.
But basically left to right. Assault order, Move Fast order, Move order.

4

Did you try using RVO Avoidance ?
Have a look at this: https://docs.unrealengine.com/4.27/en-US/InteractiveExperiences/ArtificialIntelligence/NavigationSystem/Avoidance/

5

I’ve tried now. But sadly no change.

I saw that the RVO has different avoidance groups. But since the rocks are part of the foliage system I can’t seem to add them to any of the avoidance groups.

Edit

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Looking at the path finding debug while running the game, it seem to totaly ignore the navmesh as nothing of this geometry can found in the pathfinding
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I’m confused.

1 Like
6

Did you find a solution to this?