How to compile a custom EQS test?

[Ivan3z]

I want to make a very simple filter for an environment query.

This is the query:

I just want the AI to find the weapons that don’t has an owner.

In blueprint it would be something like this (I haven’t tested the code yet)

I have been looking for information to make my own test but according to what I have read it can only be done in C++.

Source:

Custom EQS test

Hello here, I want to create a custom EQS test, however it’s not possible in Blueprint and I can’t find any documentation on how to achieve it in C++. Can someone lead me where to start or provide any documentation about this subject please?

So I tried to follow the instructions but I have many doubts.

Instructions:

How to Write an EQS Test in UE4 | Mercuna

Class reference:

FEnvQueryResult

At the moment I only know that the class must have this structure and you override these virtual functions.

So the questions are:
-What Libraries must be included?
-Can be it edited with Visual Studio?
-What type of project should be created?
-Is there any PATH given to the linker and/or compiler? How to do it?
-Once it is compiled, how to integrate it into Unreal?

I know, a lot of newbie questions!!

Perhaps a complete step-by-step example would be of great help!!

Thank you so much!!

[Ivan3z]

Ok… everything was a complete disaster!!

I tried to follow some tutorials

This video:

UE5 How to make a custom EQS Test for water (C++)

And this video:

How to Setup Visual Studio 2022 for Unreal Engine

But everything went wrong.
Create a new C++ class and all the problems started.

It asks me to recompile the editor for my IDE.

It also asks me to recompile the project.

Hidden levels is also a problem

So I go to GitHub and get the Unreal 5 source code

But the scripts don’t work and it doesn’t generate the project files

So I want to open my project and still not use C++, but the project won’t open because it doesn’t recognize the version. He asks me to rebuild it.

I choose the option “YES” and it does not work.

Now I’m locked in a dead end.

Luckily I have a backup of my project. I can fix everything without losing my progress. I just had to replace the “Content” folder of my latest version in the previous version.

But all this was a very bad experience!!

That’s why I want to ask the people of Unreal to please make manuals or tutorials to be able to do this kind of thing safely.

I have come close to losing entire months of work.
I was very lucky to have made a backup beforehand.

Thank you very much!!

[Ivan3z]

I just found this post again after two years.
I want to say, i managed to compile the test.
From the date of the post I guess I was only using blueprints at that time.

Bad idea.

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Solution:

0-Do not download or compile the GidHub engine source code
1-Create a new C++ project and migrate all your files to the new project.
2-Learn how to configure the .uproject file
3-Learn how to configure the .Target.cs file
4-Learn how to configure the .Build.cs file
5-Nativize all your blueprints to C++
6-Never use Visual Studio again
7-DONE!!

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Now you are free and you have all the power of C++ in your hands.
Nothing can stop you now!!