DoN's 3D-Pathfinding / Flying-AI system (with full source!)

VSZ · March 17, 2016, 5:27pm

It’s the name of your project Change it from 3D_navmesh to Navmesh_3D and try.

According to an Epic dev from this thread, project names that begin with a number (as opposed to an alphabet) cause the Unreal Build Tool to throw compiler errors exactly like the ones seen in your output log.

hamsterPL · March 17, 2016, 6:42pm

O man! I had no idea about that. I had project folder name started with digit, a I changed only that and it worked!

For there first time I managed to package shipping build with plugin

So basicly after I changed project folder name, there was no problems.

Thank you for your help and patience

VSZ · March 17, 2016, 8:18pm

Great to hear! Is this for a new project?

BTW, best of luck with releasing your Toby the Brave game! Looks like a lot of fun.

hamsterPL · March 17, 2016, 9:34pm

Heheheh thank you! Toby will have significant change in terms of art, character and overall quality in near future. Believing in feedback from playtesters, it will be a change for better. It will take me some time to finish it.

About flying AI - I was trying make something like that a while ago in blueprints only, but I failed and left it for a while. Lately I found your solution accidently while I was looking for some advanced AI’s made in UE 4. I’m making shooter kit in sci-fi style for marketplace - Side Scroller Shooter Kit - Cover system, Human AI, QTE System & much more! - Marketplace - Epic Developer Community Forums and I want make some flying AI’s but I belevie I can’t use plugins in marketplace item, and it would be a bit of overkill for this type of “small project”.

I’m always curious about different solution for gameplay mechanics made in UE 4, that’s why your project is interesting to me. I don’t think so I will use it in Toby, but I want to play around with this, learn something, and maybe use it in future projects.
And also I was always having trouble with packaging game with plugin, I thought it is impossible for current UE version, and there you go, you helped me out

anonymous_user_2a09f2b7 · March 21, 2016, 2:15pm

Hi @

How are You?

[FONT=Arial Black]
Amazing Pathfinding. You are a genius.
Cool flying cybernetic objects. It is from Cinematic VR Demo?

But one though about waypoints. Only is accepted two waypoint!!!
I Can only add location for initial position and a destination.
Could I add anothers waypoint, various, like in UTGame? It’s possible?

Regards
[FONT=Arial Black]๑

VSZ · March 21, 2016, 6:01pm

lol, I’m flattered

Re: waypoints, although the sample project shows only “origin to destination” type of movement you can build a system with multiple waypoints (“Goal Cue” actors in the sample) but you’ll have to manage the behavior tree (or API calls if you’re not using behavior trees) on your own. Eg: you can make the goal actor variable an array and sequentially pick them in your behavior tree each time one goal is exhausted. Check out the “Goal Flip” boolean I’m using for the pawns which does something similar (loops between origin and destination continuously).

Now if you’re talking about supporting this feature directly at the plugin/API level then (maybe someone wants to pre-calculate a solution with fixed points in advance instead of calling the API each time) then we’ll have to add a new function that accepts an array of “desired path points” instead of a single destination vector for the nav solver to use. But there’s no real performance loss in just treating each waypoint as a new destination and calling the API (or FlyTo node) yourself, so for now I think people who need it can just manage it themselves in their behavior-tree/blueprints. If I find the time (no promises!) I’ll try to add a multi-waypoint example to the sample project.

On this note, I’m not sure the fancy bots will stay in the sample project forever (they’re from the Infiltrator demo to answer your first question!). I’ve reached out to find out whether I’m allowed to use them with this free sample project but regardless of what answer I get, everyone downloading the project should note that all the stuff inside the “EpicContent” folder is obviously governed by Epic’s EULA for their sample content.

anonymous_user_2a09f2b7 · March 23, 2016, 3:27pm

Hi @

Is good to see you flattered @. You deserve. His work is a great contribution!

I like the examples you have used. With it is possible to perceive the potential for your plugin.

I’d love to see more waypoints. ｡ ◕‿◕｡ Please!
I have subscribed your thread. I’ll follow it.

I’m learning about behavior tree only now, I am currently involved in a project, and little time left me to analyze technical aspects involved in building an AI in depth, because I’m character modeler and rigger.
I’m going to learn C++ only after finish this my recent project.
So I will understand more clearly about the terms used. But I understand arrays and blueprints at a basic level, of course.

Thanks for your attention
Best regards. Good Work!

SUMFX · March 29, 2016, 2:29pm

Amazing stuff!

anonymous_user_e2b63aee1 · April 7, 2016, 7:37pm

I´ve been working a lot lately so I didn’t have much time to play more with this solution but I cropped a 10 minutes dirty test adding an array support to pawn blueprint. I shall put the code later but as you may see it´s working flawlessly well, almost …
I´ll let the video: watch?v=8c4INjuVz2w

PS: Sorry for the bad MOVAVI capture.

Cheers

anonymous_user_e2b63aee1 · April 9, 2016, 6:42pm


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Kismet Array Library Reference"
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The array to perform the operation on *"
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The last valid index of the array"
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Kismet Math Library Reference"
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Kismet Math Library Reference"
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      LinkedTo(0)=EdGraphPin'K2Node_CallArrayFunction_23.EdGraphPin_9643'
      bDefaultValueIsIgnored=True
   End Object
   Begin Object Name="EdGraphPin_9188"
      PinName="OutputPin"
      Direction=EGPD_Output
      PinType=(PinCategory="int")
      LinkedTo(0)=EdGraphPin'K2Node_Knot_62.EdGraphPin_9181'
   End Object
   Pins(0)=EdGraphPin'EdGraphPin_9187'
   Pins(1)=EdGraphPin'EdGraphPin_9188'
   NodePosX=-752
   NodePosY=560
   NodeGuid=C2309D424CE4ED73628E48B577784749
End Object
Begin Object Class=K2Node_Knot Name="K2Node_Knot_62"
   Begin Object Class=EdGraphPin Name="EdGraphPin_9181"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9182"
   End Object
   Begin Object Name="EdGraphPin_9181"
      PinName="InputPin"
      PinType=(PinCategory="int")
      LinkedTo(0)=EdGraphPin'K2Node_Knot_61.EdGraphPin_9188'
      bDefaultValueIsIgnored=True
   End Object
   Begin Object Name="EdGraphPin_9182"
      PinName="OutputPin"
      Direction=EGPD_Output
      PinType=(PinCategory="int")
      LinkedTo(0)=EdGraphPin'K2Node_CallFunction_4019.EdGraphPin_9688'
   End Object
   Pins(0)=EdGraphPin'EdGraphPin_9181'
   Pins(1)=EdGraphPin'EdGraphPin_9182'
   NodePosX=-64
   NodePosY=560
   NodeGuid=A23285CB4A9217FFB4279CB8B42F8B5C
End Object
Begin Object Class=K2Node_CallArrayFunction Name="K2Node_CallArrayFunction_25"
   Begin Object Class=EdGraphPin Name="EdGraphPin_9698"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9699"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9700"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9701"
   End Object
   Begin Object Name="EdGraphPin_9698"
      PinName="self"
      PinFriendlyName="Target"
      PinToolTip="Target
Kismet Array Library Reference"
      PinType=(PinCategory="object",PinSubCategoryObject=Class'/Script/Engine.KismetArrayLibrary')
      DefaultObject=Default__KismetArrayLibrary
      bHidden=True
   End Object
   Begin Object Name="EdGraphPin_9699"
      PinName="TargetArray"
      PinToolTip="Target Array
Array of Goal Cue References

The array to get an item from *"
      PinType=(PinCategory="object",PinSubCategoryObject=BlueprintGeneratedClass'/Game/DonNavigationSamples/Cues/GoalCue.GoalCue_C',bIsArray=True,bIsReference=True,bIsConst=True)
      LinkedTo(0)=EdGraphPin'K2Node_VariableGet_1935.EdGraphPin_8844'
      bDefaultValueIsIgnored=True
   End Object
   Begin Object Name="EdGraphPin_9700"
      PinName="Index"
      PinToolTip="Index
Integer

The index in the array to get an item from *"
      PinType=(PinCategory="int")
      DefaultValue="0"
      AutogeneratedDefaultValue="0"
      LinkedTo(0)=EdGraphPin'K2Node_CallFunction_4020.EdGraphPin_9713'
   End Object
   Begin Object Name="EdGraphPin_9701"
      PinName="Item"
      PinToolTip="Item
Goal Cue Reference"
      Direction=EGPD_Output
      PinType=(PinCategory="object",PinSubCategoryObject=BlueprintGeneratedClass'/Game/DonNavigationSamples/Cues/GoalCue.GoalCue_C')
      AutogeneratedDefaultValue="0"
      LinkedTo(0)=EdGraphPin'K2Node_VariableSet_336.EdGraphPin_9138'
   End Object
   bIsPureFunc=True
   FunctionReference=(MemberParent=Class'/Script/Engine.KismetArrayLibrary',MemberName="Array_Get")
   Pins(0)=EdGraphPin'EdGraphPin_9698'
   Pins(1)=EdGraphPin'EdGraphPin_9699'
   Pins(2)=EdGraphPin'EdGraphPin_9700'
   Pins(3)=EdGraphPin'EdGraphPin_9701'
   NodePosX=400
   NodePosY=256
   NodeGuid=5FC038E74110F1E77231C292E2752CC3
End Object
Begin Object Class=K2Node_VariableSet Name="K2Node_VariableSet_336"
   Begin Object Class=EdGraphPin Name="EdGraphPin_9136"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9137"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9138"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9139"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9140"
   End Object
   Begin Object Name="EdGraphPin_9136"
      PinName="execute"
      PinType=(PinCategory="exec")
      LinkedTo(0)=EdGraphPin'K2Node_IfThenElse_138.EdGraphPin_9078'
   End Object
   Begin Object Name="EdGraphPin_9137"
      PinName="then"
      Direction=EGPD_Output
      PinType=(PinCategory="exec")
      LinkedTo(0)=EdGraphPin'K2Node_FunctionResult_3.EdGraphPin_9599'
   End Object
   Begin Object Name="EdGraphPin_9138"
      PinName="GoalFlip"
      PinType=(PinCategory="object",PinSubCategoryObject=BlueprintGeneratedClass'/Game/DonNavigationSamples/Cues/GoalCue.GoalCue_C')
      LinkedTo(0)=EdGraphPin'K2Node_CallArrayFunction_25.EdGraphPin_9701'
   End Object
   Begin Object Name="EdGraphPin_9139"
      PinName="Output_Get"
      PinToolTip="Retrieves the value of the variable, can use instead of a separate Get node"
      Direction=EGPD_Output
      PinType=(PinCategory="object",PinSubCategoryObject=BlueprintGeneratedClass'/Game/DonNavigationSamples/Cues/GoalCue.GoalCue_C')
   End Object
   Begin Object Name="EdGraphPin_9140"
      PinName="self"
      PinFriendlyName="Target"
      PinType=(PinCategory="object",PinSubCategoryObject=BlueprintGeneratedClass'/Game/DonNavigationSamples/Pawns/BP_NavigatorPawn.BP_NavigatorPawn_C')
      bHidden=True
   End Object
   VariableReference=(MemberName="GoalFlip",MemberGuid=1DA4EFA24E56EC73DDA09EB822DC7604,bSelfContext=True)
   Pins(0)=EdGraphPin'EdGraphPin_9136'
   Pins(1)=EdGraphPin'EdGraphPin_9137'
   Pins(2)=EdGraphPin'EdGraphPin_9138'
   Pins(3)=EdGraphPin'EdGraphPin_9139'
   Pins(4)=EdGraphPin'EdGraphPin_9140'
   NodePosX=768
   NodePosY=160
   NodeGuid=56107AED42BECA6AB6291FAEFA1AB42D
End Object
Begin Object Class=K2Node_CallFunction Name="K2Node_CallFunction_4020"
   Begin Object Class=EdGraphPin Name="EdGraphPin_9710"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9711"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9712"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9713"
   End Object
   Begin Object Name="EdGraphPin_9710"
      PinName="self"
      PinFriendlyName="Target"
      PinToolTip="Target
Kismet Math Library Reference"
      PinType=(PinCategory="object",PinSubCategoryObject=Class'/Script/Engine.KismetMathLibrary')
      DefaultObject=Default__KismetMathLibrary
      bHidden=True
   End Object
   Begin Object Name="EdGraphPin_9711"
      PinName="A"
      PinToolTip="A
Integer"
      PinType=(PinCategory="int")
      DefaultValue="0"
      AutogeneratedDefaultValue="0"
      LinkedTo(0)=EdGraphPin'K2Node_CallFunction_4717.EdGraphPin_9653'
   End Object
   Begin Object Name="EdGraphPin_9712"
      PinName="B"
      PinToolTip="B
Integer"
      PinType=(PinCategory="int")
      DefaultValue="1"
      AutogeneratedDefaultValue="1"
   End Object
   Begin Object Name="EdGraphPin_9713"
      PinName="ReturnValue"
      PinToolTip="Return Value
Integer"
      Direction=EGPD_Output
      PinType=(PinCategory="int")
      AutogeneratedDefaultValue="0"
      LinkedTo(0)=EdGraphPin'K2Node_CallArrayFunction_25.EdGraphPin_9700'
   End Object
   bIsPureFunc=True
   FunctionReference=(MemberParent=Class'/Script/Engine.KismetMathLibrary',MemberName="Subtract_IntInt")
   Pins(0)=EdGraphPin'EdGraphPin_9710'
   Pins(1)=EdGraphPin'EdGraphPin_9711'
   Pins(2)=EdGraphPin'EdGraphPin_9712'
   Pins(3)=EdGraphPin'EdGraphPin_9713'
   NodePosX=320
   NodePosY=432
   NodeGuid=0505CD454FB262C0AB6C7E86CF35A834
End Object
Begin Object Class=K2Node_CommutativeAssociativeBinaryOperator Name="K2Node_CommutativeAssociativeBinaryOperator_76"
   Begin Object Class=EdGraphPin Name="EdGraphPin_9722"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9723"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9724"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9725"
   End Object
   Begin Object Name="EdGraphPin_9722"
      PinName="self"
      PinFriendlyName="Target"
      PinToolTip="Target
Kismet Math Library Reference"
      PinType=(PinCategory="object",PinSubCategoryObject=Class'/Script/Engine.KismetMathLibrary')
      DefaultObject=Default__KismetMathLibrary
      bHidden=True
   End Object
   Begin Object Name="EdGraphPin_9723"
      PinName="A"
      PinToolTip="A
Integer"
      PinType=(PinCategory="int")
      DefaultValue="0"
      AutogeneratedDefaultValue="0"
      LinkedTo(0)=EdGraphPin'K2Node_CallFunction_4717.EdGraphPin_9653'
   End Object
   Begin Object Name="EdGraphPin_9724"
      PinName="B"
      PinToolTip="B
Integer"
      PinType=(PinCategory="int")
      DefaultValue="1"
      AutogeneratedDefaultValue="1"
   End Object
   Begin Object Name="EdGraphPin_9725"
      PinName="ReturnValue"
      PinToolTip="Return Value
Integer"
      Direction=EGPD_Output
      PinType=(PinCategory="int")
      AutogeneratedDefaultValue="0"
      LinkedTo(0)=EdGraphPin'K2Node_CallArrayFunction_26.EdGraphPin_9736'
   End Object
   bIsPureFunc=True
   FunctionReference=(MemberParent=Class'/Script/Engine.KismetMathLibrary',MemberName="Add_IntInt")
   Pins(0)=EdGraphPin'EdGraphPin_9722'
   Pins(1)=EdGraphPin'EdGraphPin_9723'
   Pins(2)=EdGraphPin'EdGraphPin_9724'
   Pins(3)=EdGraphPin'EdGraphPin_9725'
   NodePosX=320
   NodePosY=560
   NodeGuid=DFAE73F945405AA6332838AD0A416533
End Object
Begin Object Class=K2Node_CallArrayFunction Name="K2Node_CallArrayFunction_26"
   Begin Object Class=EdGraphPin Name="EdGraphPin_9734"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9735"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9736"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9737"
   End Object
   Begin Object Name="EdGraphPin_9734"
      PinName="self"
      PinFriendlyName="Target"
      PinToolTip="Target
Kismet Array Library Reference"
      PinType=(PinCategory="object",PinSubCategoryObject=Class'/Script/Engine.KismetArrayLibrary')
      DefaultObject=Default__KismetArrayLibrary
      bHidden=True
   End Object
   Begin Object Name="EdGraphPin_9735"
      PinName="TargetArray"
      PinToolTip="Target Array
Array of Goal Cue References

The array to get an item from *"
      PinType=(PinCategory="object",PinSubCategoryObject=BlueprintGeneratedClass'/Game/DonNavigationSamples/Cues/GoalCue.GoalCue_C',bIsArray=True,bIsReference=True,bIsConst=True)
      LinkedTo(0)=EdGraphPin'K2Node_VariableGet_1935.EdGraphPin_8844'
      bDefaultValueIsIgnored=True
   End Object
   Begin Object Name="EdGraphPin_9736"
      PinName="Index"
      PinToolTip="Index
Integer

The index in the array to get an item from *"
      PinType=(PinCategory="int")
      DefaultValue="0"
      AutogeneratedDefaultValue="0"
      LinkedTo(0)=EdGraphPin'K2Node_CommutativeAssociativeBinaryOperator_76.EdGraphPin_9725'
   End Object
   Begin Object Name="EdGraphPin_9737"
      PinName="Item"
      PinToolTip="Item
Goal Cue Reference"
      Direction=EGPD_Output
      PinType=(PinCategory="object",PinSubCategoryObject=BlueprintGeneratedClass'/Game/DonNavigationSamples/Cues/GoalCue.GoalCue_C')
      AutogeneratedDefaultValue="0"
      LinkedTo(0)=EdGraphPin'K2Node_VariableSet_334.EdGraphPin_9033'
   End Object
   bIsPureFunc=True
   FunctionReference=(MemberParent=Class'/Script/Engine.KismetArrayLibrary',MemberName="Array_Get")
   Pins(0)=EdGraphPin'EdGraphPin_9734'
   Pins(1)=EdGraphPin'EdGraphPin_9735'
   Pins(2)=EdGraphPin'EdGraphPin_9736'
   Pins(3)=EdGraphPin'EdGraphPin_9737'
   NodePosX=528
   NodePosY=416
   NodeGuid=2FEDD2804B8673D5F4332E988502955F
End Object
Begin Object Class=K2Node_VariableSet Name="K2Node_VariableSet_334"
   Begin Object Class=EdGraphPin Name="EdGraphPin_9031"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9032"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9033"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9034"
   End Object
   Begin Object Class=EdGraphPin Name="EdGraphPin_9035"
   End Object
   Begin Object Name="EdGraphPin_9031"
      PinName="execute"
      PinType=(PinCategory="exec")
      LinkedTo(0)=EdGraphPin'K2Node_IfThenElse_138.EdGraphPin_9079'
   End Object
   Begin Object Name="EdGraphPin_9032"
      PinName="then"
      Direction=EGPD_Output
      PinType=(PinCategory="exec")
      LinkedTo(0)=EdGraphPin'K2Node_FunctionResult_3.EdGraphPin_9599'
   End Object
   Begin Object Name="EdGraphPin_9033"
      PinName="GoalFlip"
      PinType=(PinCategory="object",PinSubCategoryObject=BlueprintGeneratedClass'/Game/DonNavigationSamples/Cues/GoalCue.GoalCue_C')
      LinkedTo(0)=EdGraphPin'K2Node_CallArrayFunction_26.EdGraphPin_9737'
   End Object
   Begin Object Name="EdGraphPin_9034"
      PinName="Output_Get"
      PinToolTip="Retrieves the value of the variable, can use instead of a separate Get node"
      Direction=EGPD_Output
      PinType=(PinCategory="object",PinSubCategoryObject=BlueprintGeneratedClass'/Game/DonNavigationSamples/Cues/GoalCue.GoalCue_C')
   End Object
   Begin Object Name="EdGraphPin_9035"
      PinName="self"
      PinFriendlyName="Target"
      PinType=(PinCategory="object",PinSubCategoryObject=BlueprintGeneratedClass'/Game/DonNavigationSamples/Pawns/BP_NavigatorPawn.BP_NavigatorPawn_C')
      bHidden=True
   End Object
   VariableReference=(MemberName="GoalFlip",MemberGuid=1DA4EFA24E56EC73DDA09EB822DC7604,bSelfContext=True)
   Pins(0)=EdGraphPin'EdGraphPin_9031'
   Pins(1)=EdGraphPin'EdGraphPin_9032'
   Pins(2)=EdGraphPin'EdGraphPin_9033'
   Pins(3)=EdGraphPin'EdGraphPin_9034'
   Pins(4)=EdGraphPin'EdGraphPin_9035'
   NodePosX=784
   NodePosY=320
   NodeGuid=B251826740E8CC46C4E4AF86F79E18CB
End Object

I forgot the code. This is the picture:

amigo · April 10, 2016, 6:18pm

,

Thank you for releasing this as a free plugin, and especially for releasing the source code along. I wish would follow your example…

I’ve been trying to get the plugin to work with 4.11.1 (latest release) but I’m not having much luck. It compiles without errors but when I start a project, it crashes during loading. The log shows this as the only clue


Fatal error: [File:D:\BuildFarm\buildmachine_++UE4+Release-4.11\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp] [Line: 2824]
NewObject with empty name can't be used to create default subobjects (inside of UObject derived class constructor) as it produces inconsistent object names. Use ObjectInitializer.CreateDefaultSuobject<> instead.

It doesn’t tell me much since it’s not even in the plugin code, so I’m not sure if this is a UE4 bug or a plugin one.

Any ideas?

VSZ · April 14, 2016, 2:20pm

All, I didn’t see the new replies on this thread until now. Somehow the VBulletin thread subscription mail just doesn’t seem to work reliably for me. Sometimes it sends an email when there’s a new post, more often than not it doesn’t!

   @rsfx - Thanks for sharing that. I think that's the multi-waypoint setup that        was looking for too. Btw FPS on the video looks really low, is it the recording software or just the way it is? :P I'm a bit surprised to see the bot bumping into obstacles so often, that is not the intended level of accuracy at all! Did you try playing around with the VoxelSize setting to see if that helps? Not sure if you ran into a bug in the system or a fundamental limitation of the overall setup.

   @ - thanks for bringing that to my attention! I haven't migrated to 4.11 yet so I haven't had a  to test. When I get some time I'll migrate the sample project over to 4.11.1 and see what happens. Expect it to take a week or so though, it's crunch time for my project ATM and if I start looking at this I know I won't stop :P

Plugin news:

I’ve made some critical bugfixes and usability improvements that I haven’t checked in or uploaded yet. One of them is a serious bug in the dynamic collision task scheduler where unrelated tasks were getting mixed up! That fix should improve accuracy of dynamic collisions dramatically although I don’t think that will help with general collision issues like the one @rsfx posted in that video.

I’ll try to bundle up these bugfixes and 4.11 testing together into one update.

motorsep · April 14, 2016, 3:07pm

Wonderful plugin!

Is Android supported out of the box?

Does it perform well on mobile ?

Would it work along with Dungeon Architect ?

VSZ · April 14, 2016, 3:39pm

I have no idea honestly I’m not using any OS specific features so assuming your map is small things might just work.

I’ve no experience with mobile development though so I don’t know what kind of issues to expect.

Try it out and let us know what happens!

anonymous_user_7cbfd1e8 · April 15, 2016, 7:57am

;512666:

All, I didn’t see the new replies on this thread until now. Somehow the VBulletin thread subscription mail just doesn’t seem to work reliably for me. Sometimes it sends an email when there’s a new post, more often than not it doesn’t!
   @rsfx - Thanks for sharing that. I think that's the multi-waypoint setup that        was looking for too. Btw FPS on the video looks really low, is it the recording software or just the way it is? :P I'm a bit surprised to see the bot bumping into obstacles so often, that is not the intended level of accuracy at all! Did you try playing around with the VoxelSize setting to see if that helps? Not sure if you ran into a bug in the system or a fundamental limitation of the overall setup.

   @ - thanks for bringing that to my attention! I haven't migrated to 4.11 yet so I haven't had a  to test. When I get some time I'll migrate the sample project over to 4.11.1 and see what happens. Expect it to take a week or so though, it's crunch time for my project ATM and if I start looking at this I know I won't stop :P
Plugin news:

I’ve made some critical bugfixes and usability improvements that I haven’t checked in or uploaded yet. One of them is a serious bug in the dynamic collision task scheduler where unrelated tasks were getting mixed up! That fix should improve accuracy of dynamic collisions dramatically although I don’t think that will help with general collision issues like the one @rsfx posted in that video.

I’ll try to bundle up these bugfixes and 4.11 testing together into one update.

Just to provide some more context for the error reported by , project compiles fine, then trows the error mentioned when you try and open it. Heres a snippet from my log that is relevant for the error. UE4 version 4.11.1


[2016.04.15-07.41.09:467]  0]LogWindows:Error: === Critical error: ===
Fatal error: [File:C:\UE4_Engine\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp] [Line: 2824] 
NewObject with empty name can't be used to create default subobjects (inside of UObject derived class constructor) as it produces inconsistent object names. Use ObjectInitializer.CreateDefaultSuobject<> instead.


KERNELBASE.dll
UE4Editor-Core.dll!FOutputDeviceWindowsError::Serialize() [c:\ue4_engine\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:95]
UE4Editor-Core.dll!FOutputDevice::Logf__VA() [c:\ue4_engine\engine\source\runtime\core\private\misc\outputdevice.cpp:149]
UE4Editor-Core.dll!FDebug::AssertFailed() [c:\ue4_engine\engine\source\runtime\core\private\misc\outputdevice.cpp:430]
UE4Editor-CoreUObject.dll!FObjectInitializer::AssertIfInConstructor() [c:\ue4_engine\engine\source\runtime\coreuobject\private\uobject\uobjectglobals.cpp:2825]
UE4Editor-Engine.dll!NewObject<UBodySetup>() [c:\ue4_engine\engine\source\runtime\coreuobject\public\uobject\uobjectglobals.h:1173]
UE4Editor-Engine.dll!UBoxComponent::UpdateBodySetup() [c:\ue4_engine\engine\source\runtime\engine\private\components\boxcomponent.cpp:40]
UE4Editor-Engine.dll!UBoxComponent::SetBoxExtent() [c:\ue4_engine\engine\source\runtime\engine\private\components\boxcomponent.cpp:24]
UE4Editor-DonAINavigation.dll
UE4Editor-CoreUObject.dll!UClass::CreateDefaultObject() [c:\ue4_engine\engine\source\runtime\coreuobject\private\uobject\class.cpp:2763]
UE4Editor-CoreUObject.dll!UObjectLoadAllCompiledInDefaultProperties() [c:\ue4_engine\engine\source\runtime\coreuobject\private\uobject\uobjectbase.cpp:724]
UE4Editor-CoreUObject.dll!ProcessNewlyLoadedUObjects() [c:\e4_engine\engine\source\runtime\coreuobject\private\uobject\uobjectbase.cpp:818]
UE4Editor-CoreUObject.dll!TBaseStaticDelegateInstance<void __cdecl(void)>::ExecuteIfSafe() [c:\ue4_engine\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:1021]
UE4Editor-Core.dll!TBaseMulticastDelegate<void>::Broadcast() [c:\ue4_engine\engine\source\runtime\core\public\delegates\delegatesignatureimpl_variadics.inl:921]
UE4Editor-Core.dll!FModuleManager::LoadModuleWithFailureReason() [c:\ue4_engine\engine\source\runtime\core\private\modules\modulemanager.cpp:427]
UE4Editor-Projects.dll!FModuleDescriptor::LoadModulesForPhase() [c:\ue4_engine\engine\source\runtime\projects\private\moduledescriptor.cpp:398]
UE4Editor-Projects.dll!FPluginManager::LoadModulesForEnabledPlugins() [c:\ue4_engine\engine\source\runtime\projects\private\pluginmanager.cpp:539]
UE4Editor.exe!FEngineLoop::LoadStartupModules() [c:\ue4_engine\engine\source\runtime\launch\private\launchengineloop.cpp:2080]
UE4Editor.exe!FEngineLoop::PreInit() [c:\ue4_engine\engine\source\runtime\launch\private\launchengineloop.cpp:1544]
UE4Editor.exe!GuardedMain() [c:\perforce\ue4_engine\engine\source\runtime\launch\private\launch.cpp:110]
UE4Editor.exe!GuardedMainWrapper() [c:\ue4_engine\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor.exe!WinMain() [c:\ue4_engine\engine\source\runtime\launch\private\windows\launchwindows.cpp:200]
UE4Editor.exe!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
KERNEL32.DLL
ntdll.dll
ntdll.dll

EDIT:

after fiddling around a bit I’ve found that if I edit theUDoNNavigationVolumeComponent constructor to not have the SetBoxExtent call the error disappears:

as such


UDoNNavigationVolumeComponent::UDoNNavigationVolumeComponent(const FObjectInitializer& ObjectInitializer) : Super(ObjectInitializer)
{
	BoxExtent = FVector(50.0f, 50.0f, 50.0f);

	static FName CollisionProfileName(TEXT("DoNNavigationVolume"));
	SetCollisionProfileName(CollisionProfileName);	
}

Now I don’t know what unwanted side effects this might lead to if any, but it seems to be working alright for me

VSZ · April 15, 2016, 10:21pm

@Liine, thanks a lot for that, you’ve saved me some time there

There should be no side-effects whatsoever with that change. The class in question is deprecated and not used by the plugin. I left the whole “Legacy” subfolder in there just as an example of the “space filling volumes” solution that I previously used, it’s not used by the current system.

I still need to update the plugin with a whole clutch of bugfixes that I’ve made over the past month or so though.

VSZ · April 22, 2016, 12:13pm

v1.2 released

Latest plugin and sample project are available both in the OP and in this link:

There’s a ton of tweaks and bugfixes in this (git commit). Changes include, but are not limited to:

Major bugfix: Hash comparison in dynamic task scheduler is fixed to account for unrelated meshes using a common cache key. Unrelated tasks were previously getting mixed up because of this bug!
With this fix, the moving glass panels example in the sample project should now be “near perfect”. The rocket dodging example is still rough around the edges (so there’s still further scope for improving dynamic collision handling)
Major usability feature: Automatically teleport pawn to a nearby “good” location for cases where the pawn is starting pathfinding from a spot where initial collisions are indeterminate. Goal vector will also be automatically tweaked if it happens to be in a “bad spot”. This should help new users in getting their initial testing going with fewer hitches. You can disable this behavior under query params by setting “FlexibleOriginGoal” to false. Some of the older rules still apply - if your pathfinding goal or origin is very near the floor then your queries will either fail or time-out.
4.11 should be working fine now (I haven’t tested this myself, so please let me know if it still doesn’t work for you!)
Improved logging: Prevent log spam by memorizing known “bad queries”, other general improvements to logging
API signature change to “ScheduleDynamicCollisionUpdate” to allow users to disable caching altogether. This change is not backward compatible I’m afraid. C++ users should update existing calls to this function accordingly.
Stability v/s Performance compromise in favor of stability: several VolumeAtUnsafe lookups have been replaced with VolumeAtSafe. Plugin users now need to worry less about triggering certain edge conditions which may lead to crashes, at the cost of a small amount of performance.
Animation states for your pawn can be easily updated now using new callbacks: Locomotion Start/End/Next/Abort. Implement these as part of the IDonNavigator interface.
Navigator interface now exported properly as part of DONAINAVIGATION_API
You can now disable cache usage completely for dynamic collisions by passing DisableCacheUsage as true to the scheduler. This is important for some situations where you cannot reliably use the mesh component (or a cache identifier) as a unique key for your mesh and you’d rather not bother with caching at all.

==

Just so you know, I’m not actively working on new features for the plugin. However whenever I find things that my own game needs in the plugin then I try to improve or fix what I can at that time.

Let me know if any links aren’t working! All this bumping of versions, uploading stuff and testing links is more finicky than I could have ever imagined before

amigo · April 23, 2016, 1:55am

@

Thanks for the update - unfortunately I don’t have good news here…

Module.DonAINavigation.cpp
M:\Unreal Projects\PluginCompiler\Plugins\DonAINavigation\Source\DonAINavigation\Private\BehaviorTree\BTTask_FlyTo.cpp(45): warning C4996: ‘FBlackboardKeySelector::CacheSelectedKey’: CacheSelectedKey is deprecated. Please use ResolveSelectedKey instead. Please update your code to the new API before upgrading to the next release, otherwise your project will no longer compile.
c:\unrealengine\4.11\engine\source\runtime\aimodule\classes\behaviortree\BehaviorTreeTypes.h(515): note: see declaration of ‘FBlackboardKeySelector::CacheSelectedKey’
M:\Unreal Projects\PluginCompiler\Plugins\DonAINavigation\Source\DonAINavigation\Private\DonNavigationManager.cpp(1238): error C2248: ‘FCollisionQueryParams::IgnoreComponents’: cannot access private member declared in class ‘FCollisionQueryParams’
c:\unrealengine\4.11\engine\source\runtime\engine\public\CollisionQueryParams.h(53): note: see declaration of ‘FCollisionQueryParams::IgnoreComponents’
C:\UnrealEngine\4.11\Engine\Source\Runtime\Engine\Classes\GameFramework/MovementComponent.h(12): note: see declaration of ‘FCollisionQueryParams’
M:\Unreal Projects\PluginCompiler\Plugins\DonAINavigation\Source\DonAINavigation\Private\DonNavigationManager.cpp(1312): error C2248: ‘FCollisionQueryParams::IgnoreComponents’: cannot access private member declared in class ‘FCollisionQueryParams’
c:\unrealengine\4.11\engine\source\runtime\engine\public\CollisionQueryParams.h(53): note: see declaration of ‘FCollisionQueryParams::IgnoreComponents’
C:\UnrealEngine\4.11\Engine\Source\Runtime\Engine\Classes\GameFramework/MovementComponent.h(12): note: see declaration of ‘FCollisionQueryParams’
-------- End Detailed Actions Stats -----------------------------------------------------------
ERROR: UBT ERROR: Failed to produce item: M:\Unreal Projects\PluginCompiler\Plugins\DonAINavigation\Binaries\Win64\UE4Editor-DonAINavigation.dll

And, per the 4.11 release notes:

FCollisionQueryParams::IgnoreComponents is now private, use AddIgnoredComponent() and GetIgnoredComponents() instead.
This enabled an optimization to make the components list unique only once on-demand in GetIgnoredComponents(), rather each time a component is added.

VSZ · April 23, 2016, 9:37am

Alright, that’s what I get for not testing 4.11 directly and assuming “it would work”

I need some time to get 4.11 setup. I’m low on download bandwidth, disk space on SSD (and low on time too!), I’ll need to take time away from today’s project work if I’m to focus on this…

Are you able to work around those issues yourself until I get there? (assuming AddIgnoredComponent only needs to be added in a few places).

amigo · April 23, 2016, 3:36pm

N00b here, so I’d appreciate a little guidance…I already tried using AddIgnoredComponent but it requires UPrimitiveComponent, and GetIgnoredComponents returns TArray of uint32s - I’m not sure what those uint32s are.

Thanks!