Grail and Game Engines

Grail and Unity

To make use of grail you must simply drop the grail_cs.dll in Assets/Plugins/ directory inside your project directory.

If you would also like to use Grail configuration files (produced by our graphical tools), you will also need to place GrailSerialization.dll UtilityModel.dll and third-party tool library - YamlDotNet.dll.

After doing so Unity will create .meta files for libraries and you will be able to use Grail’s sources in your code.

Grail and Unity
Figure 1. Image showing directory structure in sample Unity project using Grail.

Grail and UE4

Unreal integration is a little bit more convoluted, but not very much so.

  1. First, place grail binaries and headers in any directory inside your project. For purposes of this tutorial, we assume that they’re located in ThirdParty/grail directory.

  2. Open the Source/Your_Project_Name/Your_Project_Name.Build.cs file

  3. Modify it in the following way:

    using UnrealBuildTool;
    using System.IO;
    public class Babel : ModuleRules
      private string ThirdPartyPath
        get { return Path.GetFullPath(Path.Combine(ModuleDirectory, "../../ThirdParty/")); }
      public Babel(ReadOnlyTargetRules Target) : base(Target)
        ///... your standard UE build system settings ...
        //Add these lines
        PublicAdditionalLibraries.Add(Path.Combine(ThirdPartyPath, "grail/lib/grail.lib"));
        PublicIncludePaths.Add(Path.Combine(ThirdPartyPath, "grail/include/"));
        bUseRTTI = true;
  4. Generate Visual Studio project files and voila!