Goal Oriented Action Planning AI Framework

[mid_gen]

@joessu

Sounds good!

i have spent a couple days with it now and have a few comments.

1. some awesome blueprint nodes! Move to target, move to location, eqs jobs, cool stuff!!

2. GOAPer Demo, dudes seem to get stuck picking up ammo.

3. I’m having issues seeing what the current action is for my guy. Execute is called often but update cost is not called at all. Seems strange to me that If execute is being called that update cost should be called. Update: Saw the ActionDescription field and see that my action is being selected

Seems to me like update cost should be more of a function than an event, that if you do too much work or certain things in that event it will screw up logic in execute.

I think I’m going to copy your 3D text widget

Update:

I got my action to work! I gotta say your plugin is pretty good! it was fairly easy (just a couple of days of messing around).

Only strange thing is that the walk speed passed to your move function needs to also be set on the animation blueprint. I think I might try to cleanly bind those two together somehow.

Anyways, Good stuff! Will be interesting to see how this handles more complex scenarios.

Glad some people are finding it useful I haven’t really had a chance to finish it, it’s just a barebones implementation that hasn’t really been tested properly. I’m pretty sure the planning algorithm isn’t 100%.

I need to get all my plugins updated to 4.19 soon and will have a go at clearing all the issues I’ve got open on github. Got a bit distracted by a new plugin I’ve started working on.

[joessu (Joe Andresen)]

So I discovered that the GoaperDemo and my project have the same problem under 4.19.

isMoveCompleted only seems to return true once for the first completed move request. After that it seems to never return true.

In GoaperDemo They get stuck in PickupAmmo, and in mine they get stuck in a MoveToTarget action, which is doing pretty much the same thing as PickupAmmo.

Hope this isn’t a bug in 4.19!

[mid_gen]

@joessu

So I discovered that the GoaperDemo and my project have the same problem under 4.19.

isMoveCompleted only seems to return true once for the first completed move request. After that it seems to never return true.

In GoaperDemo They get stuck in PickupAmmo, and in mine they get stuck in a MoveToTarget action, which is doing pretty much the same thing as PickupAmmo.

Hope this isn’t a bug in 4.19!

It’ll be a bug in the code somewhere. I don’t have time to actively develop this right now but I’m happy to accept pull requests.

[joessu (Joe Andresen)]

Yea so we are actively working on our AI and Game which uses your plugin, If we make any modifications to the plugin i’ll make sure it finds it’s way back to you!

We managed to work around the movement completed event by doing our own distance check and then stopping the movement request. Cheers!

[n00854180t]

@mid_gen - Where are the states defined at? I tried searching in the demo project and in the code but couldn’t find it.

Found it: It’s in the project settings under Plugins -> GOAPer.

[mid_gen]

Yep, in the plugin config.

I haven’t had time to work on this at all for months, it’s a bit of a cringe-tastic state.

I did notice that some code relating to the HTN Planner has made it into the engine now…anyone wanting a more compete planner implementation may want to take a look.

[n00854180t]

Right now I’m just tinkering on a quest generator. I’m not sure if I plan to use it for actual AI or not.

[mid_gen]

Alrighty.

For anyone else interested in using a planner, I would look at the HTNPlanner plugin that comes with the engine now. I had a quick look through it and it looks like it’s fully functional. Haven’t had time to try it out though.

I would love to come back and finish this up, but I have other priorities at the moment!

[DosBuster]

@mid_gen

Alrighty.

For anyone else interested in using a planner, I would look at the HTNPlanner plugin that comes with the engine now. I had a quick look through it and it looks like it’s fully functional. Haven’t had time to try it out though.

I would love to come back and finish this up, but I have other priorities at the moment!

Is there any documentation on how to use HTNPlanner? I enabled it but can’t find its presence anywhere in the editor.

[mid_gen]

@DosBuster

Is there any documentation on how to use HTNPlanner? I enabled it but can’t find its presence anywhere in the editor.

From my quick glance over it, looks like it’s code only at the moment, but it looks like a complete working system is there.

[narratech]

Hi folks!

We have already released a new code plugin in the Unreal Marketplace called GOAP NPC:
https://www.unrealengine.com/marketp…er-characters/

You can find it useful
We are asking for testers… and we draw a digital copy of Cyberpunk 2077 between them
http://narratech.com/en/goap-npc-pon-to-test-our-tools/