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AI won't drop off ledges or climb stairs.

My AI won't walk off ledges or use the stairs. I think it's a problem with the NavMesh, but I'm not sure how to fix it. Pictures are provided.alt text

Product Version: UE 4.18
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flowerbeds.png (1.6 MB)
stairs.png (1.5 MB)
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asked Jan 03 '18 at 09:00 PM in Blueprint Scripting

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sounderdisc
29 7 11 15

avatar image jimd667 Jan 03 '18 at 09:33 PM

Can you post an image of your Blueprint or Behavior tree so we can see the logic behind how you move your AI?

avatar image sounderdisc Jan 03 '18 at 10:36 PM

Here's the Behavior tree and the AI controller event graph.alt text

behaviortree.png (293.4 kB)
aicontroler.png (341.9 kB)
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2 answers: sort voted first

Hi! to fix your problem you can use 3 solutions:

1) You can use NavLink Actors (you can find it in your object mode tab looking for Nav Link Proxy) and connect the points A and B at the start and the end of your stairs. You can use it even for make the AI jump off the ledges.

2) You can edit your NavMesh parameters from Edit/ProjectSettings/Engine/Navigation Mesh. I'm not sure what parameter fix your problem, I can guess Cell Height or Agent max height.

3) You can fix your stairs collision to a ramp, you'd need better IK for foots bt the way so it would take more time.

Have a nice day!

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answered Jan 04 '18 at 07:30 AM

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Iohoilpotere
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avatar image sounderdisc Jan 04 '18 at 07:58 PM

The NavLink and changing project settings worked. For anyone else having the same problem, the setting was "Agent Max Step Height." I also had to change the AI character's max step height.

avatar image PRESSURE2000 Apr 21 '19 at 02:18 PM

could you please tell us what settings you set it to? Im trying and my AI is NOT falling off the ledge!

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First thing I noticed is that you steps are not green, so no NavMesh on steps and it also appears that the Navmesh is not going up to the edges of you platform.

Should look more like this. alt text

I would play with Navmesh, or repost it as Navmesh issue.

Regards Narg

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answered Jan 04 '18 at 05:10 AM

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Narghile
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