---
title: UE5动画重定向笔记
date: 2023-08-18 18:08:12
excerpt: 
tags: 
rating: ⭐
---

# ConvertAnimation()
主要逻辑位于`UAnimationEditorUtilityLibrary::ConvertAnimation()`或者`FIKRetargetBatchOperation::ConvertAnimation()`。核心重定向逻辑为`UIKRetargetProcessor::RunRetargeter()`。

## 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



# FBX
https://help.autodesk.com/view/FBX/2020/ENU/?guid=FBX_Developer_Help_welcome_to_the_fbx_sdk_html