How to include private header files of other Modules into my Module?


I try to create a Plugin with an editor module for a component Visualizer.
I have trouble in understanding and setting up the MyToolEditor.Build.cs
I want to extent an already existing Component Visualizer but this Visualizer is declared in the private Folder of the ComponentVisualizers Module.

My Question is, how could I access this?
How can I include private header files of other Modules?

I tried something like this, but with no luck

	new string[] {

I’ve tried to do that in many ways without success, but finally nailed it!

This works for engine modules:

using System.IO; // Note this import, it's needed below

namespace UnrealBuildTool.Rules
    public class Foo : ModuleRules
        public Foo(TargetInfo Target)
            // ...
            // Get the engine path. Ends with "Engine/"
            string engine_path = Path.GetFullPath(BuildConfiguration.RelativeEnginePath);
            // Now get the base of UE4's modules dir (could also be Developer, Editor, ThirdParty)
            string srcrt_path = engine_path + "Source/Runtime/";
            // now you can include the module's private paths!
            // as an example, you can expose UE4's abstraction of D3D11, located in Source/Runtime/Windows/D3D11RHI
            PublicIncludePaths.Add(srcrt_path + "Windows/D3D11RHI/Private");
            PublicIncludePaths.Add(srcrt_path + "Windows/D3D11RHI/Private/Windows");

Thanks for posting your solution! Helped me solve the same issue today!

You rock! Thanks!

This was helpful! Thanks!

Where I have to write this?

Thanks! :slight_smile:

since 4.18:

string engine_path = Path.GetFullPath(Target.RelativeEnginePath);


Your *.Build.cs file for the project.