Add **Nested Animations** for compositing animation clips

Source/Engine/ContentImporters/AssetsImportingManager.cpp

@@ -31,6 +31,7 @@
 #include "CreateParticleEmitterFunction.h"
 #include "CreateAnimationGraphFunction.h"
 #include "CreateVisualScript.h"
+#include "CreateAnimation.h"
 #include "CreateJson.h"
 
 // Tags used to detect asset creation mode
@@ -51,6 +52,7 @@ const String AssetsImportingManager::CreateSceneAnimationTag(TEXT("SceneAnimatio
 const String AssetsImportingManager::CreateMaterialFunctionTag(TEXT("MaterialFunction"));
 const String AssetsImportingManager::CreateParticleEmitterFunctionTag(TEXT("ParticleEmitterFunction"));
 const String AssetsImportingManager::CreateAnimationGraphFunctionTag(TEXT("AnimationGraphFunction"));
+const String AssetsImportingManager::CreateAnimationTag(TEXT("Animation"));
 const String AssetsImportingManager::CreateVisualScriptTag(TEXT("VisualScript"));
 
 class AssetsImportingManagerService : public EngineService
@@ -467,6 +469,7 @@ bool AssetsImportingManagerService::Init()
         { AssetsImportingManager::CreateMaterialFunctionTag, CreateMaterialFunction::Create },
         { AssetsImportingManager::CreateParticleEmitterFunctionTag, CreateParticleEmitterFunction::Create },
         { AssetsImportingManager::CreateAnimationGraphFunctionTag, CreateAnimationGraphFunction::Create },
+        { AssetsImportingManager::CreateAnimationTag, CreateAnimation::Create },
         { AssetsImportingManager::CreateVisualScriptTag, CreateVisualScript::Create },
     };
     AssetsImportingManager::Creators.Add(InBuildCreators, ARRAY_COUNT(InBuildCreators));

Source/Engine/ContentImporters/AssetsImportingManager.h

@@ -108,6 +108,11 @@ public:
     /// </summary>
     static const String CreateAnimationGraphFunctionTag;
 
+    /// <summary>
+    /// The create animation asset tag.
+    /// </summary>
+    static const String CreateAnimationTag;
+
     /// <summary>
     /// The create visual script asset tag.
     /// </summary>

Source/Engine/ContentImporters/CreateAnimation.h

@@ -0,0 +1,52 @@
+// Copyright (c) 2012-2022 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#include "Types.h"
+
+#if COMPILE_WITH_ASSETS_IMPORTER
+
+#include "Engine/Content/Assets/Animation.h"
+#include "Engine/Serialization/MemoryWriteStream.h"
+
+/// <summary>
+/// Creating animation utility
+/// </summary>
+class CreateAnimation
+{
+public:
+    static CreateAssetResult Create(CreateAssetContext& context)
+    {
+        // Base
+        IMPORT_SETUP(Animation, 1);
+
+        // Serialize empty animation data to the stream
+        MemoryWriteStream stream(256);
+        {
+            // Info
+            stream.WriteInt32(102);
+            stream.WriteDouble(5 * 60.0);
+            stream.WriteDouble(60.0);
+            stream.WriteBool(false);
+            stream.WriteString(StringView::Empty, 13);
+
+            // Animation channels
+            stream.WriteInt32(0);
+
+            // Animation events
+            stream.WriteInt32(0);
+
+            // Nested animations
+            stream.WriteInt32(0);
+        }
+
+        // Copy to asset chunk
+        if (context.AllocateChunk(0))
+            return CreateAssetResult::CannotAllocateChunk;
+        context.Data.Header.Chunks[0]->Data.Copy(stream.GetHandle(), stream.GetPosition());
+
+        return CreateAssetResult::Ok;
+    }
+};
+
+#endif