c

Development Programming & Scripting
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1

I am looking for a way to create and save a UStaticMesh in C++. What I want to achieve is to save an instance of UStaticMesh created with NewObject in C++ as Contents/MyStaticMesh. I tried the following, but it didn’t work. If anyone knows a solution, I would appreciate your guidance.
(UE 5.3)

UCLASS()
class MYPROJECT_API UMyEditorLibrary : public UEditorLevelLibrary 
{
    GENERATED_BODY()
public:
    UFUNCTION(BlueprintCallable, Category = "Nav")
        static UStaticMesh* CreateTestMesh(UWorld* World)
        {
             UStaticMesh* Mesh = NewObject<UStaticMesh>();

            // Create a new FStaticMeshSourceModel
            FStaticMeshSourceModel& SourceModel = Mesh->AddSourceModel();
            FMeshDescription* MeshDescription = new FMeshDescription();
            TArray<FVector3f> Positions = { FVector3f::Zero(), FVector3f::One() * 100, FVector3f::XAxisVector * 100 };
            for(auto i = 0; i < Positions.Num(); ++i)
            {
                auto P = Positions[i];
                auto ID = MeshDescription->CreateVertex();
                MeshDescription->GetVertexPosition(ID).Set(P.X, P.Y, P.Z);
            }
            // Copy the data from the FMeshDescription to the FStaticMeshSourceModel
            SourceModel.GetMeshDescriptionBulkData()->SaveMeshDescription(*MeshDescription);
            // Add the FStaticMeshSourceModel to the CombinedStaticMesh
            //CombinedStaticMesh->AddSourceModel(*SourceModel);
            // Build the CombinedStaticMesh
            Mesh->Build(false);
            FString AssetPath = TEXT("/Contents/TestStaticMesh");
            auto& FileMan = FPlatformFileManager::Get();
            auto& File = FileMan.GetPlatformFile();
            auto res = File.CreateDirectoryTree(*AssetPath);
            UPackage* Package = CreatePackage(*AssetPath);
            Package->FullyLoad();
            Mesh->Rename(TEXT("TestMesh"), Package);
            FAssetRegistryModule::GetRegistry().AssetCreated(Mesh);
            Package->MarkPackageDirty();
            return Mesh;
        }
};