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Source/Engine/ContentImporters/CreateAnimationGraph.cpp

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+// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
+
+#include "CreateAnimationGraph.h"
+
+#if COMPILE_WITH_ASSETS_IMPORTER
+
+#include "Engine/Content/Assets/AnimationGraph.h"
+#include "Engine/Serialization/MemoryWriteStream.h"
+
+CreateAssetResult CreateAnimationGraph::Create(CreateAssetContext& context)
+{
+    // Base
+    IMPORT_SETUP(AnimationGraph, 1);
+
+    AnimGraph graph(nullptr);
+
+    // Create empty surface with animation output node
+    graph.Nodes.Resize(1);
+    auto& rootNode = graph.Nodes[0];
+    rootNode.Type = GRAPH_NODE_MAKE_TYPE(9, 1);
+    rootNode.ID = 1;
+    rootNode.Values.Resize(1);
+    rootNode.Values[0] = (int32)RootMotionMode::NoExtraction;
+    rootNode.Boxes.Resize(1);
+    rootNode.Boxes[0] = AnimGraphBox(&rootNode, 0, VariantType::Void);
+
+    // Add parameter (hidden) used to pass the skinned model asset (skeleton source)
+    graph.Parameters.Resize(1);
+    AnimGraphParameter& baseModelParam = graph.Parameters[0];
+    baseModelParam.Identifier = ANIM_GRAPH_PARAM_BASE_MODEL_ID;
+    baseModelParam.Type = VariantType::Asset;
+    baseModelParam.IsPublic = false;
+    baseModelParam.Value = Guid::Empty;
+
+    // Serialize
+    MemoryWriteStream stream(256);
+    if (graph.Save(&stream, true))
+        return CreateAssetResult::Error;
+
+    // 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