Dynamic Navmesh Different in Packaged than Editor

Xilverback · November 17, 2018, 2:49pm

I’ve run into a new problem in 4.21. Having some serious difficulties generating navigation meshes on dynamic terrain. The biggest problem is that after some tuning things seem to work fine in the editor but when packaged, there are seams in the navmesh that prevent AI from crossing.

These are my navigation settings

[/Script/NavigationSystem.RecastNavMesh]
RuntimeGeneration=Dynamic
AgentMaxSlope=46.000000
TileSizeUU=1000.000000
AgentMaxStepHeight=64.000000
bFixedTilePoolSize=True
bForceRebuildOnLoad=True
bDoFullyAsyncNavDataGathering=True

[/Script/NavigationSystem.NavigationSystemV1]
CrowdManagerClass=Class’/Script/AIModule.CrowdManager’
bAutoCreateNavigationData=True
bSpawnNavDataInNavBoundsLevel=False
bAllowClientSideNavigation=True
bShouldDiscardSubLevelNavData=True
bTickWhilePaused=False
bInitialBuildingLocked=False
bSkipAgentHeightCheckWhenPickingNavData=False
DataGatheringMode=Lazy
bGenerateNavigationOnlyAroundNavigationInvokers=True
ActiveTilesUpdateInterval=1.000000
+SupportedAgents=(Name=“Common”,Color=(B=0,G=255,R=140,A=164),DefaultQueryExtent=(X=50.000000,Y=50.000000,Z=250.000000),NavigationDataClassName=None,AgentRadius=35.000000,AgentHeight=144.000000,AgentStepHeight=-1.000000,NavWalkingSearchHeightScale=0.500000,PreferredNavData=None,bCanCrouch=False,bCanJump=True,bCanWalk=True,bCanSwim=False,bCanFly=False)
DirtyAreasUpdateFreq=60.000000

This problem is new to 4.21. Everything was working in 4.20. I did notice now that without setting to fully async, NavigationInvokers stopped working as well.

Xilverback · November 17, 2018, 6:26pm

I confirmed that the seams are along the Tile boundaries. Increasing the TileSize changes the seams accordingly.

Xilverback · November 17, 2018, 6:32pm

See the problem in action

Xilverback · November 17, 2018, 8:41pm

Tried Switching to Chunky Monotone as discussed in this thread…
Thread

No luck. Again, things seem to work in the editor but not in the packaged build.

Xilverback · November 17, 2018, 9:29pm

Also, I’ve already reported this through your the Bug Tracker. I am aware that you recently switched to a new bug tracking method. What I’m looking for here is new/unknown configuration requirements for 4.21. That could address this.

Xilverback · November 20, 2018, 4:22pm

Tweaking the Cell Size to 32 x 21 and the AgentRadius to 35 made the problem go away but now having problems with AI using doors, stairs etc.

jimsnomis · November 20, 2018, 4:40pm

Just to confim I’m seeing similar issues using navigation invokers and dynamic navmesh. They worked fine in 4.20. In 4.21 the recastnavmesh serialization has some uninitialized variables in it when loaded (NaN etc.). This led to some infinite loops in the tile calculations and seems to be intermittent, sometimes works fine other times not.

Jeff_A · November 20, 2018, 10:15pm

Hello,

We’ve recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.

https://epicsupport.force.com/unrealengine/s/

Thanks

Xilverback · November 21, 2018, 12:02am

Did that first

blobdole · November 24, 2018, 2:14am

Do you have a link to the issue? We are having the same issue and I would like to vote on it and track it.

Xilverback · November 24, 2018, 6:17am

I’d love to share a link with you but all I got was this…

Thank you for your bug submission. We
will be investigating your case and
follow up if more information is
needed or when a ticket is created.
You can track the latest UE4 issues at
https://issues.unrealengine.com/

blobdole · November 24, 2018, 10:33am

I made a test project that demonstrates this issue.

https://drive.google.com/open?id=1ZBNv-nj8o1ow5FkGmnTx6z8AkDpi3PiD

How it looks in editor:

How it looks when packaged:

Positivity · November 29, 2018, 5:51pm

I have Exact problem Fix Probobly will be only in 4.21.1 , Only how long we must wait. For now now Packaged Testing.

Xilverback · November 30, 2018, 3:00pm

Got this email from Epic…

It appears you might not have received my previous reply to this issue. I am glad to say this issue is fixed in our latest internal build. I’m unsure when it will be officially released but you are using any of our Source Builds you can grab it from the Master Branch on GitHub. This was fixed in CL-4567513

Positivity · November 30, 2018, 6:21pm

Awesome, now just we need to wait till Launcher version got Updated. 4.21.1 , They fixed this Bug and Bug where level Streeming doesn’t regenerate Dynamic nav mesh on Mobile.

blobdole · December 4, 2018, 10:09pm

Confirmed NOT repaired in 4.21.1

=(

Positivity · December 8, 2018, 10:32am

Yes, It is not Fixed, however, Support told us that it is Fixed in Master Branch of UE4 … so I m confused from where does 4.21.1 comes if not the master branch … but ok I’m Downloading Master Branch will update if master Branch really fixes this Issue.

jimsnomis · December 8, 2018, 2:19pm

Has anyone located the commit for this on the master branch? I can’t find any comments with CL-4567513.

jimsnomis · December 8, 2018, 2:26pm

Thanks though there’s no reference in the comments to the code/commit for the fix.

Positivity · December 8, 2018, 2:22pm

You can read in Comments what Support Answered to a person who made bug report … https://answers.unrealengine.com/questions/848562/view.html