Moved the Material Component property override renaming to EditorMaterialComponent via ApplyAutomaticPropertyUpdates.

MaterialAssignment::ApplyProperties() still reports warnings but does not update the m_propertyOverrides.
MaterialAssignment::ApplyProperties() will now skip the old name'd overrides if overrides are present for the new names. I'm not sure if this will ever happen, but it did happen while I had some intermediate changes, so I imagine it could happen again.
I had to update the Material::FindPropertyIndex function to expose information about renames when they occur. This should make it easier for other systems to get (somewhat) automatic benefit from the version update feature.
I also found that there was an issue with material inspector where it wouldn't be initialized the the right override values when renames were present. Now it applies the renames to whatever override data it gets from the Material Component.

Signed-off-by: santorac <55155825+santorac@users.noreply.github.com>

Gems/Atom/Feature/Common/Code/Source/Material/MaterialAssignment.cpp

@@ -137,31 +137,28 @@ namespace AZ
 
             if (m_materialInstance->CanCompile())
             {
-                AZStd::vector<AZStd::pair<Name, Name>> renamedProperties;
-
                 for (const auto& propertyPair : m_propertyOverrides)
                 {
                     if (!propertyPair.second.empty())
                     {
-                        RPI::MaterialPropertyIndex materialPropertyIndex = m_materialInstance->FindPropertyIndex(propertyPair.first);
+                        bool wasRenamed = false;
+                        Name newName;
+                        RPI::MaterialPropertyIndex materialPropertyIndex = m_materialInstance->FindPropertyIndex(propertyPair.first, &wasRenamed, &newName);
+
+                        // FindPropertyIndex will have already reported a message about what the old and new names are. Here we just add some extra info to help the user resolve it.
+                        AZ_Warning("MaterialAssignment", !wasRenamed,
+                            "Consider running \"Apply Automatic Property Updates\" to use the latest property names.",
+                            propertyPair.first.GetCStr(),
+                            newName.GetCStr());
 
-                        // If we didn't find the name, check to see if there was a rename that should be used.
+                        if (wasRenamed && m_propertyOverrides.find(newName) != m_propertyOverrides.end())
-                        if (materialPropertyIndex.IsNull())
                         {
-                            Name propertyId = propertyPair.first;
+                            materialPropertyIndex.Reset();
-
+                            
-                            if (m_materialInstance->GetAsset()->GetMaterialTypeAsset()->ApplyPropertyRenames(propertyId))
+                            AZ_Warning("MaterialAssignment", false,
-                            {
+                                "Material property '%s' has been renamed to '%s', and a property override exists for both. The one with the old name will be ignored.",
-                                renamedProperties.emplace_back(propertyPair.first, propertyId);
+                                propertyPair.first.GetCStr(),
-                                
+                                newName.GetCStr());
-                                // We should be able to find the property now, using the new name
-                                materialPropertyIndex = m_materialInstance->FindPropertyIndex(propertyId);
-
-                                AZ_Warning("MaterialAssignment", false,
-                                    "Material property '%s' has been renamed to '%s', and a material override references the old name. Save the level or prefab to permanently apply this change.",
-                                    propertyPair.first.GetCStr(),
-                                    propertyId.GetCStr());
-                            }
                         }
 
                         if (!materialPropertyIndex.IsNull())
@@ -172,15 +169,6 @@ namespace AZ
                     }
                 }
 
-                // Now that we're done looping over all the overrides, it's safe to apply any renames that were scheduled
-                for (auto& pair : renamedProperties)
-                {
-                    const Name& oldName = pair.first;
-                    const Name& newName = pair.second;
-                    m_propertyOverrides[newName] = m_propertyOverrides[oldName];
-                    m_propertyOverrides.erase(oldName);
-                }
-
                 return m_materialInstance->Compile();
             }
 

Gems/Atom/RPI/Code/Include/Atom/RPI.Public/Material/Material.h

@@ -71,7 +71,9 @@ namespace AZ
             virtual ~Material();
 
             //! Finds the material property index from the material property ID
-            MaterialPropertyIndex FindPropertyIndex(const Name& propertyId) const;
+            //! @param wasRenamed optional parameter that is set to true if @propertyId is an old name and an automatic rename was applied to find the index.
+            //! @param newName optional parameter that is set to the new property name, if the property was renamed.
+            MaterialPropertyIndex FindPropertyIndex(const Name& propertyId, bool* wasRenamed = nullptr, Name* newName = nullptr) const;
 
             //! Sets the value of a material property. The template data type must match the property's data type.
             //! @return true if property value was changed

Gems/Atom/RPI/Code/Source/RPI.Public/Material/Material.cpp

@@ -386,9 +386,39 @@ namespace AZ
             return m_currentChangeId;
         }
 
-        MaterialPropertyIndex Material::FindPropertyIndex(const Name& propertyId) const
+        MaterialPropertyIndex Material::FindPropertyIndex(const Name& propertyId, bool* wasRenamed, Name* newName) const
         {
-            return m_layout->FindPropertyIndex(propertyId);
+            if (wasRenamed)
+            {
+                *wasRenamed = false;
+            }
+
+            MaterialPropertyIndex index = m_layout->FindPropertyIndex(propertyId);
+            if (!index.IsValid())
+            {
+                Name renamedId = propertyId;
+                
+                if (m_materialAsset->GetMaterialTypeAsset()->ApplyPropertyRenames(renamedId))
+                {                                
+                    index = m_layout->FindPropertyIndex(renamedId);
+
+                    if (wasRenamed)
+                    {
+                        *wasRenamed = true;
+                    }
+
+                    if (newName)
+                    {
+                        *newName = renamedId;
+                    }
+
+                    AZ_Warning("Material", false,
+                        "Material property '%s' has been renamed to '%s'. Consider updating the corresponding source data.",
+                        propertyId.GetCStr(),
+                        renamedId.GetCStr());
+                }
+            }
+            return index;
         }
 
         template<typename Type>

Gems/Atom/RPI/Code/Tests/Material/MaterialTests.cpp

@@ -857,4 +857,35 @@ namespace UnitTest
         EXPECT_EQ(material->GetPropertyValue<int32_t>(material->FindPropertyIndex(Name{ "MyInt" })), -7);
         EXPECT_EQ(srgData->GetConstant<int32_t>(srgData->FindShaderInputConstantIndex(Name{ "m_int" })), -7);
     }
+
+    TEST_F(MaterialTests, TestFindPropertyIndexUsingOldName)
+    {
+        MaterialTypeAssetCreator materialTypeCreator;
+        materialTypeCreator.Begin(Uuid::CreateRandom());
+        materialTypeCreator.AddShader(m_testMaterialShaderAsset);
+        AddCommonTestMaterialProperties(materialTypeCreator);
+        materialTypeCreator.SetVersion(2);
+        MaterialVersionUpdate versionUpdate(2);
+        versionUpdate.AddAction(MaterialVersionUpdate::RenamePropertyAction({Name{ "OldName" },Name{ "MyInt" }}));
+        materialTypeCreator.AddVersionUpdate(versionUpdate);
+        materialTypeCreator.End(m_testMaterialTypeAsset);
+
+        MaterialAssetCreator materialCreator;
+        materialCreator.Begin(Uuid::CreateRandom(), *m_testMaterialTypeAsset);
+        materialCreator.End(m_testMaterialAsset);
+
+        Data::Instance<Material> material = Material::FindOrCreate(m_testMaterialAsset);
+
+        bool wasRenamed = false;
+        Name newName;
+        MaterialPropertyIndex indexFromOldName = material->FindPropertyIndex(Name{"OldName"}, &wasRenamed, &newName);
+        EXPECT_TRUE(wasRenamed);
+        EXPECT_EQ(newName, Name{"MyInt"});
+        
+        MaterialPropertyIndex indexFromNewName = material->FindPropertyIndex(Name{"MyInt"}, &wasRenamed, &newName);
+        EXPECT_FALSE(wasRenamed);
+
+        EXPECT_EQ(indexFromOldName, indexFromNewName);
+    }
+
 }

Gems/AtomLyIntegration/CommonFeatures/Code/Include/AtomLyIntegration/CommonFeatures/Material/MaterialComponentBus.h

@@ -43,6 +43,9 @@ namespace AZ
             virtual void ClearInvalidMaterialOverrides() = 0;
             //! Repair materials that reference missing assets by assigning the default asset
             virtual void RepairInvalidMaterialOverrides() = 0;
+            //! Repair material property overrides that reference missing properties by auto-renaming them where possible
+            //! @return the number of properties that were updated
+            virtual uint32_t ApplyAutomaticPropertyUpdates() = 0;
             //! Set default material override
             virtual void SetDefaultMaterialOverride(const AZ::Data::AssetId& materialAssetId) = 0;
             //! Get default material override

Gems/AtomLyIntegration/CommonFeatures/Code/Source/Material/EditorMaterialComponent.cpp

@@ -240,6 +240,19 @@ namespace AZ
                 UpdateMaterialSlots();
             });
             action->setToolTip("Repair materials that reference missing assets by assigning the default asset.");
+            
+            action = menu->addAction("Apply Automatic Property Updates", [this]() {
+                AzToolsFramework::ScopedUndoBatch undoBatch("Applying automatic property updates.");
+                SetDirty();
+
+                uint32_t propertiesUpdated = 0;
+                MaterialComponentRequestBus::EventResult(propertiesUpdated, GetEntityId(), &MaterialComponentRequestBus::Events::ApplyAutomaticPropertyUpdates);
+
+                AZ_Printf("EditorMaterialComponent", "Updated %u property(s).", propertiesUpdated);
+
+                UpdateMaterialSlots();
+            });
+            action->setToolTip("Repair material property overrides that reference missing properties by auto-renaming them where possible.");
         }
 
         void EditorMaterialComponent::SetPrimaryAsset(const AZ::Data::AssetId& assetId)

Gems/AtomLyIntegration/CommonFeatures/Code/Source/Material/EditorMaterialComponentInspector.cpp

@@ -352,6 +352,27 @@ namespace AZ
                     m_editData.m_materialPropertyOverrideMap, m_entityId, &MaterialComponentRequestBus::Events::GetPropertyOverrides,
                     m_materialAssignmentId);
 
+                // Apply any automatic property renames so that the material inspector will be property initialized with the right values
+                // for properties that have new names.
+                {
+                    AZStd::vector<AZStd::pair<Name, Name>> renamedProperties;
+                    for (auto& propertyOverridePair : m_editData.m_materialPropertyOverrideMap)
+                    {
+                        Name name = propertyOverridePair.first;
+                        if (m_materialInstance->GetAsset()->GetMaterialTypeAsset()->ApplyPropertyRenames(name))
+                        {
+                            renamedProperties.emplace_back(propertyOverridePair.first, name);
+                        }
+                    }
+                    for (auto& renamePair : renamedProperties)
+                    {
+                        const Name& oldName = renamePair.first;
+                        const Name& newName = renamePair.second;
+                        m_editData.m_materialPropertyOverrideMap[newName] = m_editData.m_materialPropertyOverrideMap[oldName];
+                        m_editData.m_materialPropertyOverrideMap.erase(oldName);
+                    }
+                }
+
                 for (auto& group : m_groups)
                 {
                     for (auto& property : group.second.m_properties)

Gems/AtomLyIntegration/CommonFeatures/Code/Source/Material/MaterialComponentController.cpp

@@ -49,6 +49,7 @@ namespace AZ
                     ->Event("ClearIncompatibleMaterialOverrides", &MaterialComponentRequestBus::Events::ClearIncompatibleMaterialOverrides)
                     ->Event("ClearInvalidMaterialOverrides", &MaterialComponentRequestBus::Events::ClearInvalidMaterialOverrides)
                     ->Event("RepairInvalidMaterialOverrides", &MaterialComponentRequestBus::Events::RepairInvalidMaterialOverrides)
+                    ->Event("ApplyAutomaticPropertyUpdates", &MaterialComponentRequestBus::Events::ApplyAutomaticPropertyUpdates)
                     ->Event("SetMaterialOverride", &MaterialComponentRequestBus::Events::SetMaterialOverride)
                     ->Event("GetMaterialOverride", &MaterialComponentRequestBus::Events::GetMaterialOverride)
                     ->Event("ClearMaterialOverride", &MaterialComponentRequestBus::Events::ClearMaterialOverride)
@@ -406,6 +407,39 @@ namespace AZ
             }
             LoadMaterials();
         }
+        
+        uint32_t MaterialComponentController::ApplyAutomaticPropertyUpdates()
+        {
+            uint32_t propertiesUpdated = 0;
+
+            for (auto& materialAssignmentPair : m_configuration.m_materials)
+            {
+                MaterialAssignment& materialAssignment = materialAssignmentPair.second;
+                
+                AZStd::vector<AZStd::pair<Name, Name>> renamedProperties;
+
+                for (const auto& propertyPair : materialAssignment.m_propertyOverrides)
+                {
+                    Name propertyId = propertyPair.first;
+
+                    if (materialAssignment.m_materialInstance->GetAsset()->GetMaterialTypeAsset()->ApplyPropertyRenames(propertyId))
+                    {
+                        renamedProperties.emplace_back(propertyPair.first, propertyId);
+                        ++propertiesUpdated;
+                    }
+                }
+
+                for (auto& pair : renamedProperties)
+                {
+                    const Name& oldName = pair.first;
+                    const Name& newName = pair.second;
+                    materialAssignment.m_propertyOverrides[newName] = materialAssignment.m_propertyOverrides[oldName];
+                    materialAssignment.m_propertyOverrides.erase(oldName);
+                }
+            }
+
+            return propertiesUpdated;
+        }
 
         void MaterialComponentController::SetDefaultMaterialOverride(const AZ::Data::AssetId& materialAssetId)
         {

Gems/AtomLyIntegration/CommonFeatures/Code/Source/Material/MaterialComponentController.h

@@ -58,6 +58,7 @@ namespace AZ
             void ClearIncompatibleMaterialOverrides() override;
             void ClearInvalidMaterialOverrides() override;
             void RepairInvalidMaterialOverrides() override;
+            uint32_t ApplyAutomaticPropertyUpdates() override;
             void SetDefaultMaterialOverride(const AZ::Data::AssetId& materialAssetId) override;
             const AZ::Data::AssetId GetDefaultMaterialOverride() const override;
             void ClearDefaultMaterialOverride() override;