Pass TArray<FSkeletalMaterial> to FStreamableDelegate

Development Programming & Scripting C++
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1

Hi. I’m trying to pass MaterialsToSet by reference to a FStreamableDelegate and I get a compile error. I’m not sure if MaterialsToSet is the only problem, but if anyone could tell me what I’m missing, or has general tips for improvement - that would be greatly appreciated. Oh, and please don’t mind my undescriptive variable names… Will be updated.

Cheers!

void AMCharacter::SetArmorMesh(
    USkeletalMesh* ArmorMesh,
    FMCharacterBodyMeshMaterial BodyMeshMaterial,
    FName BodyMaterialSlot,
    uint8 LoadCounter,
    TArray<FSkeletalMaterial>& MaterialsToSet)
{
    CurrentAssetsLoading++;
    LoadCounter = 0;
    TObjectPtr<UAssetManager> Manager = UAssetManager::GetIfInitialized();

    if (!BodyMaterialSlot.IsNone())
    {
        LoadCounter++;

        if (Manager)
        {
            FPrimaryAssetId Id_BodyMaterial = FPrimaryAssetId("CharacterBodyMaterial", CharacterInfo.SkinColor);

            FStreamableDelegate Delegate_BodyMaterial = FStreamableDelegate::CreateUObject(
                this,
                &AMCharacter::OnBodyMaterialLoaded,
                ArmorMesh,
                Id_BodyMaterial,
                BodyMaterialSlot,
                LoadCounter,
                MaterialsToSet);

            Manager->LoadPrimaryAsset(Id_BodyMaterial, NoBundle, Delegate_BodyMaterial);
        }
    }

    if (BodyMeshMaterial.BodyTextureSlot.IsNone())
    {
        FSkeletalMaterial ArmorMaterial = FSkeletalMaterial(BodyMeshMaterial.Material.Get(), false, false, BodyMeshMaterial.MaterialSlot);
        MaterialsToSet.Add(ArmorMaterial);

        FinalizeArmorMesh(ArmorMesh, MaterialsToSet, LoadCounter);
    }
    else
    {
        LoadCounter++;

        if (Manager)
        {
            FPrimaryAssetId Id_BodyTexture = FPrimaryAssetId("CharacterBodyTexture", CharacterInfo.SkinColor);

            FStreamableDelegate Delegate_BodyTexture = FStreamableDelegate::CreateUObject(
                this,
                &AMCharacter::OnBodyTextureLoaded,
                ArmorMesh,
                BodyMeshMaterial,
                Id_BodyTexture,
                LoadCounter,
                MaterialsToSet
            );

            Manager->LoadPrimaryAsset(Id_BodyTexture, NoBundle, Delegate_BodyTexture);
        }
    }
}

Here’s the definition of FMCharacterBodyMeshMaterial:

USTRUCT(BlueprintType)
struct FMCharacterBodyMeshMaterial
{
    GENERATED_BODY()

public:
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
    TSoftObjectPtr<UMaterialInstance> Material;

    UPROPERTY(EditAnywhere, BlueprintReadWrite)
    FName MaterialSlot;

    /** If the material uses a Body Texture, put the Slot Name here */
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
    FName BodyTextureSlot;
};

Compiler Error log:

MCharacter.cpp(455): error C2665: 'TDelegate<void (void),FDefaultDelegateUserPolicy>::CreateUObject': no overloaded function could convert all the argument types                                
E:\Epic Games\UE_5.3\Engine\Source\Runtime\Core\Public\Delegates\DelegateSignatureImpl.inl(295): note: could be 'TDelegate<void (void),FDefaultDelegateUserPolicy> TDelegate<void (void),FDefaultDelegateUserPolicy>::CreateUObject<AMCharacter,USkeletalMesh*&,FPrimaryAssetId&,FName&,uint8&,TArray<FSkeletalMaterial,FDefaultAllocator>&>(const UserClass *,void (__cdecl AMCharacter::* )(USkeletalMesh *,FPrimaryAssetId,FName,unsigned char,TArray<FSkeletalMaterial,FDefaultAllocator>) const,USkeletalMesh *&,FPrimaryAssetId &,FName &,uint8 &,TArray<FSkeletalMaterial,FDefaultAllocator> &)'                                                                                            
        with                                                                                                                                                                                                                     
        [                                                                                                                                                                                                                        
            UserClass=AMCharacter                                                                                                                                                                                                
        ]