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03-UnrealEngine/Animation/UE5动画重定向核心逻辑笔记.md

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+---
+title: UE5动画重定向核心逻辑笔记
+date: 2023-08-18 18:08:12
+excerpt: 
+tags: 
+rating: ⭐
+---
+# 前言
+
+# ConvertAnimation()
+主要逻辑位于`UAnimationEditorUtilityLibrary::ConvertAnimation()`或者`FIKRetargetBatchOperation::ConvertAnimation()`。核心重定向逻辑为`UIKRetargetProcessor::RunRetargeter()`。
+
+
+FRetargetSkeleton：
+
+## RunRootRetarget()
+FRootRetargeter::EncodePose():
+取得输入的根骨骼Transform数据并给`FRootSource Source`赋值。
+
+FRootRetargeter::DecodePose():
+```c++
+// InitialTransform 为重定向Pose计算出的数值，通过比值计算出Target的Current数值
+const FTransform InitialTransform = SourceSkeleton.RetargetGlobalPose[Source.BoneIndex];
+float InitialHeight = InitialTransform.GetTranslation().Z;
+Source.InitialHeightInverse = 1.0f / InitialHeight;
+Source.CurrentPositionNormalized = Source.CurrentPosition * Source.InitialHeightInverse;
+
+// generate basic retarget root position by scaling the normalized position by root height  
+const FVector RetargetedPosition = Source.CurrentPositionNormalized * Target.InitialHeight;
+```
+## RunFKRetarget()
+FChainEncoderFK::EncodePose():
+从骨骼链拷贝全局输入到CurrentGlobalTransforms
+
+FChainDecoderFK::DecodePose():
+
+## RunIKRetarget()
+
+## RunPoleVectorMatching()
+
+
+# UIKRetargetProcessor
+
+
+