MaterialInstance_override01.jpg

参考 †
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Translucency Lighting Modeを追加してみた †
  1. Editor\MaterialEditor\Private\MaterialEditorInstanceDetailCustomization.cpp
    • FMaterialInstanceParameterDetails::CreateBasePropertyOverrideWidgets 
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          TAttribute<bool> IsOverrideOpacityClipMaskValueEnabled = TAttribute<bool>::Create(TAttribute<bool>::FGetter::CreateSP(this, &FMaterialInstanceParameterDetails::OverrideOpacityClipMaskValueEnabled));
    TAttribute<bool> IsOverrideBlendModeEnabled = TAttribute<bool>::Create(TAttribute<bool>::FGetter::CreateSP(this, &FMaterialInstanceParameterDetails::OverrideBlendModeEnabled));
    TAttribute<bool> IsOverrideShadingModelEnabled = TAttribute<bool>::Create(TAttribute<bool>::FGetter::CreateSP(this, &FMaterialInstanceParameterDetails::OverrideShadingModelEnabled));
// start -------
    TAttribute<bool> IsOverrideTranslucencyLightingModeEnabled = TAttribute<bool>::Create(TAttribute<bool>::FGetter::CreateSP(this, &FMaterialInstanceParameterDetails::OverrideTranslucencyLightingModeEnabled));
// end ---------
    TAttribute<bool> IsOverrideTwoSidedEnabled = TAttribute<bool>::Create(TAttribute<bool>::FGetter::CreateSP(this, &FMaterialInstanceParameterDetails::OverrideTwoSidedEnabled));
    TAttribute<bool> IsOverrideDitheredLODTransitionEnabled = TAttribute<bool>::Create(TAttribute<bool>::FGetter::CreateSP(this, &FMaterialInstanceParameterDetails::OverrideDitheredLODTransitionEnabled));
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          TSharedRef<IPropertyHandle> BasePropertyOverridePropery = DetailLayout.GetProperty("BasePropertyOverrides");
    TSharedPtr<IPropertyHandle> OpacityClipMaskValueProperty = BasePropertyOverridePropery->GetChildHandle("OpacityMaskClipValue");
    TSharedPtr<IPropertyHandle> BlendModeProperty = BasePropertyOverridePropery->GetChildHandle("BlendMode");
    TSharedPtr<IPropertyHandle> ShadingModelProperty = BasePropertyOverridePropery->GetChildHandle("ShadingModel");
// start -------
    TSharedPtr<IPropertyHandle> TranslucencyLightingModeProperty = BasePropertyOverridePropery->GetChildHandle("TranslucencyLightingMode");
// end ---------
    TSharedPtr<IPropertyHandle> TwoSidedProperty = BasePropertyOverridePropery->GetChildHandle("TwoSided");
    TSharedPtr<IPropertyHandle> DitheredLODTransitionProperty = BasePropertyOverridePropery->GetChildHandle("DitheredLODTransition");
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          IDetailPropertyRow& ShadingModelPropertyRow = BasePropertyOverrideGroup.AddPropertyRow(ShadingModelProperty.ToSharedRef());
    ShadingModelPropertyRow
        .DisplayName(ShadingModelProperty->GetPropertyDisplayName())
        .ToolTip(ShadingModelProperty->GetToolTipText())
        .EditCondition(IsOverrideShadingModelEnabled, FOnBooleanValueChanged::CreateSP(this, &FMaterialInstanceParameterDetails::OnOverrideShadingModelChanged));
 
// start -------
    IDetailPropertyRow& TranslucencyLightingModePropertyRow = BasePropertyOverrideGroup.AddPropertyRow(TranslucencyLightingModeProperty.ToSharedRef());
    TranslucencyLightingModePropertyRow
        .DisplayName(TranslucencyLightingModeProperty->GetPropertyDisplayName())
        .ToolTip(TranslucencyLightingModeProperty->GetToolTipText())
        .EditCondition(IsOverrideTranslucencyLightingModeEnabled, FOnBooleanValueChanged::CreateSP(this, &FMaterialInstanceParameterDetails::OnOverrideTranslucencyLightingModeChanged));
// end ---------
    • メソッド追加 
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      // start -------
bool FMaterialInstanceParameterDetails::OverrideTranslucencyLightingModeEnabled() const
{
    return MaterialEditorInstance->BasePropertyOverrides.bOverride_TranslucencyLightingMode;
}
// end ---------

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      // start -------
void FMaterialInstanceParameterDetails::OnOverrideTranslucencyLightingModeChanged(bool NewValue)
{
    MaterialEditorInstance->BasePropertyOverrides.bOverride_TranslucencyLightingMode = NewValue;
    MaterialEditorInstance->PostEditChange();
    FEditorSupportDelegates::RedrawAllViewports.Broadcast();
}
// end ---------
  2. Editor\MaterialEditor\Private\MaterialEditorInstanceDetailCustomization.h
    • FMaterialInstanceParameterDetails 
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          bool OverrideOpacityClipMaskValueEnabled() const;
    bool OverrideBlendModeEnabled() const;
    bool OverrideShadingModelEnabled() const;
// start -------
    bool OverrideTranslucencyLightingModeEnabled() const;
// end ---------
    bool OverrideTwoSidedEnabled() const;
    bool OverrideDitheredLODTransitionEnabled() const;
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          void OnOverrideOpacityClipMaskValueChanged(bool NewValue);
    void OnOverrideBlendModeChanged(bool NewValue);
    void OnOverrideShadingModelChanged(bool NewValue);
// start -------
    void OnOverrideTranslucencyLightingModeChanged(bool NewValue);
// end ---------
    void OnOverrideTwoSidedChanged(bool NewValue);
    void OnOverrideDitheredLODTransitionChanged(bool NewValue);
  3. Runtime\Engine\Classes\Materials\Material.h
    • UMaterial 
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          ENGINE_API virtual float GetOpacityMaskClipValue() const override;
    ENGINE_API virtual EBlendMode GetBlendMode() const override;
    ENGINE_API virtual EMaterialShadingModel GetShadingModel() const override;
// start -------
    ENGINE_API virtual enum ETranslucencyLightingMode GetTranslucencyLightingMode() const override;
// end ---------
    ENGINE_API virtual bool IsTwoSided() const override;
    ENGINE_API virtual bool IsDitheredLODTransition() const override;
  4. Runtime\Engine\Classes\Materials\MaterialInstance.h
    • UMaterialInstance 
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          float OpacityMaskClipValue;
    TEnumAsByte<EBlendMode> BlendMode;
    TEnumAsByte<EMaterialShadingModel> ShadingModel;
// start -------
    TEnumAsByte<enum ETranslucencyLightingMode> TranslucencyLightingMode;
// end ---------
    uint32 TwoSided : 1;
    uint32 DitheredLODTransition : 1;
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          ENGINE_API virtual float GetOpacityMaskClipValue() const override;
    ENGINE_API virtual EBlendMode GetBlendMode() const override;
    ENGINE_API virtual EMaterialShadingModel GetShadingModel() const override;
// start -------
    ENGINE_API virtual enum ETranslucencyLightingMode GetTranslucencyLightingMode() const override;
// end ---------
    ENGINE_API virtual bool IsTwoSided() const override;
    ENGINE_API virtual bool IsDitheredLODTransition() const override;
    ENGINE_API virtual bool IsMasked() const override;;
  5. Runtime\Engine\Classes\Materials\MaterialInstanceBasePropertyOverrides.h
    • FMaterialInstanceBasePropertyOverrides 
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          /** Enables override of the two sided property. */
    UPROPERTY(EditAnywhere, Category = Material)
    bool bOverride_TwoSided;
 
// start -------
    /** Enables override of the two sided property. */
    UPROPERTY(EditAnywhere, Category = Material)
    bool bOverride_TranslucencyLightingMode;
// end ---------

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          /** The shading model */
    UPROPERTY(EditAnywhere, Category = Material, meta = (editcondition = "bOverride_ShadingModel"))
    TEnumAsByte<EMaterialShadingModel> ShadingModel;
 
// start -------
    /** The shading model */
    UPROPERTY(EditAnywhere, Category = Material, meta = (editcondition = "bOverride_TranslucencyLightingMode"))
    TEnumAsByte<enum ETranslucencyLightingMode> TranslucencyLightingMode;
// end ---------
  6. Runtime\Engine\Classes\Materials\MaterialInstanceDynamic.h
    • UMaterialInstanceDynamic 
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          //Material base property overrides. MIDs cannot override these so they just grab from their parent.
    virtual float GetOpacityMaskClipValue() const override;
    virtual EBlendMode GetBlendMode() const override;
    virtual EMaterialShadingModel GetShadingModel() const override;
// start -------
    virtual enum ETranslucencyLightingMode GetTranslucencyLightingMode() const override;
// end ---------
    virtual bool IsTwoSided() const override;
    virtual bool IsDitheredLODTransition() const override;
    virtual bool IsMasked() const override;
  7. Runtime\Engine\Classes\Materials\MaterialInterface.h
    • UMaterialInterface 
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          ENGINE_API virtual float GetOpacityMaskClipValue() const;
    ENGINE_API virtual EBlendMode GetBlendMode() const;
    ENGINE_API virtual EMaterialShadingModel GetShadingModel() const;
// start -------
    ENGINE_API virtual enum ETranslucencyLightingMode GetTranslucencyLightingMode() const;
// end ---------
    ENGINE_API virtual bool IsTwoSided() const;
    ENGINE_API virtual bool IsDitheredLODTransition() const;
    ENGINE_API virtual bool IsTranslucencyWritingCustomDepth() const;
    ENGINE_API virtual bool IsMasked() const;
    ENGINE_API virtual bool IsDeferredDecal() const;
  8. Runtime\Engine\Private\Materials\Material.cpp
    • メソッド追加 
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      // start -------
ETranslucencyLightingMode UMaterial::GetTranslucencyLightingMode() const
{
    return TranslucencyLightingMode;
}
// end ---------
  9. Runtime\Engine\Private\Materials\MaterialInstance.cpp
    • メソッド追加 
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      // start -------
ETranslucencyLightingMode UMaterialInstanceDynamic::GetTranslucencyLightingMode() const
{
    return Parent ? Parent->GetTranslucencyLightingMode() : TLM_VolumetricNonDirectional;
}
// end ---------

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      // start -------
ETranslucencyLightingMode UMaterialInstance::GetTranslucencyLightingMode() const
{
    return TranslucencyLightingMode;
}
// end ---------
    • UMaterialInstance::UpdateOverridableBaseProperties 
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              OpacityMaskClipValue = 0.0f;
        BlendMode = BLEND_Opaque;
        ShadingModel = MSM_DefaultLit;
// start -------
        TranslucencyLightingMode = TLM_VolumetricNonDirectional;
// end ---------
        TwoSided = 0;
        DitheredLODTransition = 0;
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          if (BasePropertyOverrides.bOverride_ShadingModel)
    {
        ShadingModel = BasePropertyOverrides.ShadingModel;
    }
    else
    {
        ShadingModel = Parent->GetShadingModel();
    }
 
// start -------
    if (BasePropertyOverrides.bOverride_TranslucencyLightingMode)
    {
        TranslucencyLightingMode = BasePropertyOverrides.TranslucencyLightingMode;
    }
    else
    {
        TranslucencyLightingMode = Parent->GetTranslucencyLightingMode();
    }
// end ---------
    • UMaterialInstance::Serialize
      • 「VER_LIC_COM04_VER01」は自分の改造バージョンを記述する→エンジン改造-アセットのエンジンバージョン管理 
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                            // unrelated but closest change to bug
                    if( Ar.UE4Ver() < VER_UE4_STATIC_SHADOW_DEPTH_MAPS )
                    {
                        // switched enum order
                        switch( BasePropertyOverrides.ShadingModel )
                        {
                            case MSM_Unlit:            BasePropertyOverrides.ShadingModel = MSM_DefaultLit; break;
                            case MSM_DefaultLit:    BasePropertyOverrides.ShadingModel = MSM_Unlit; break;
                        }
                    }
// start -------
                    if( Ar.LicenseeUE4Ver() >= VER_LIC_COM04_VER01) {
                        Ar << BasePropertyOverrides.bOverride_TranslucencyLightingMode << BasePropertyOverrides.TranslucencyLightingMode;
                    }
// end ---------
    • UMaterialInstance::GetBasePropertyOverridesHash 
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          EMaterialShadingModel UsedShadingModel = GetShadingModel();
     if (UsedShadingModel != Mat->GetShadingModel())
     {
        const FString HashString = TEXT("bOverride_ShadingModel");
        Hash.UpdateWithString(*HashString, HashString.Len());
        Hash.Update((const uint8*)&UsedShadingModel, sizeof(UsedShadingModel));
        bHasOverrides = true;
    }
 
// start -------
    ETranslucencyLightingMode UsedTranslucencyLightingMode = GetTranslucencyLightingMode();
     if (UsedTranslucencyLightingMode != Mat->GetTranslucencyLightingMode())
     {
        const FString HashString = TEXT("bOverride_TranslucencyLightingMode");
        Hash.UpdateWithString(*HashString, HashString.Len());
        Hash.Update((const uint8*)&UsedTranslucencyLightingMode, sizeof(UsedTranslucencyLightingMode));
        bHasOverrides = true;
    }
// end ---------
    • UMaterialInstance::HasOverridenBaseProperties 
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          if (Parent && Material && Material->bUsedAsSpecialEngineMaterial == false &&
        ((FMath::Abs(GetOpacityMaskClipValue() - Parent->GetOpacityMaskClipValue()) > SMALL_NUMBER) ||
        (GetBlendMode() != Parent->GetBlendMode()) ||
        (GetShadingModel() != Parent->GetShadingModel()) ||
// start -------
        (GetTranslucencyLightingMode() != Parent->GetTranslucencyLightingMode()) ||
// end ---------
        (IsTwoSided() != Parent->IsTwoSided()) ||
        (IsDitheredLODTransition() != Parent->IsDitheredLODTransition()))
        )
  10. Runtime\Engine\Private\Materials\MaterialInterface.cpp
    • メソッド追加 
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      // start -------
ETranslucencyLightingMode UMaterialInterface::GetTranslucencyLightingMode() const
{
    return TLM_VolumetricNonDirectional;
}
// end ---------
  11. Runtime\Engine\Private\Materials\MaterialShared.cpp
    • FMaterialResource::GetTranslucencyLightingMode 
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      ETranslucencyLightingMode FMaterialResource::GetTranslucencyLightingMode() const
{
// start -------
#spandel
    return (ETranslucencyLightingMode)(MaterialInstance ? MaterialInstance->GetTranslucencyLightingMode() : Material->TranslucencyLightingMode);
#spanend
#spanadd
    return (ETranslucencyLightingMode)(MaterialInstance ? MaterialInstance->GetTranslucencyLightingMode() : Material->GetTranslucencyLightingMode());
#spanend
// end ---------
}
    • FMaterialInstanceBasePropertyOverrides::FMaterialInstanceBasePropertyOverrides 
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      #spanend
#spanadd
    ,bOverride_ShadingModel(false)
#spanend
#spanadd
    ,bOverride_DitheredLODTransition(false)
#spanend
#spanadd
    ,bOverride_TwoSided(false)
#spanend
#spanadd
// start -------
#spanend
#spanadd
    ,bOverride_TranslucencyLightingMode(false)
#spanend
#spanadd
// end ---------
#spanend
#spanadd
    ,OpacityMaskClipValue(.333333f)
#spanend
#spanadd
    • FMaterialInstanceBasePropertyOverrides::operator== 
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      #spanend
#spanadd
            bOverride_ShadingModel == Other.bOverride_ShadingModel &&
#spanend
#spanadd
            bOverride_TwoSided == Other.bOverride_TwoSided &&
#spanend
#spanadd
            bOverride_DitheredLODTransition == Other.bOverride_DitheredLODTransition &&
#spanend
#spanadd
// start -------
#spanend
#spanadd
            bOverride_TranslucencyLightingMode == Other.bOverride_TranslucencyLightingMode &&
#spanend
#spanadd
// end ---------
#spanend
#spanadd
            OpacityMaskClipValue == Other.OpacityMaskClipValue &&
#spanend
#spanadd
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