2023-08-18 20:11:04 +08:00
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---
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title: UE5动画重定向笔记
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date: 2023-08-18 18:08:12
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excerpt:
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tags:
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rating: ⭐
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---
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# ConvertAnimation()
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2023-08-21 10:12:05 +08:00
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主要逻辑位于`UAnimationEditorUtilityLibrary::ConvertAnimation()`或者`FIKRetargetBatchOperation::ConvertAnimation()`。核心重定向逻辑为`UIKRetargetProcessor::RunRetargeter()`。
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2023-08-18 20:11:04 +08:00
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2023-08-21 10:12:05 +08:00
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## RunRootRetarget()
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FRootRetargeter::EncodePose():
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取得输入的根骨骼Transform数据并给`FRootSource Source`赋值。
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2023-08-18 20:11:04 +08:00
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2023-08-21 10:12:05 +08:00
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FRootRetargeter::DecodePose():
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```c++
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// InitialTransform 为重定向Pose计算出的数值，通过比值计算出Target的Current数值
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const FTransform InitialTransform = SourceSkeleton.RetargetGlobalPose[Source.BoneIndex];
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float InitialHeight = InitialTransform.GetTranslation().Z;
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Source.InitialHeightInverse = 1.0f / InitialHeight;
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Source.CurrentPositionNormalized = Source.CurrentPosition * Source.InitialHeightInverse;
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// generate basic retarget root position by scaling the normalized position by root height
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const FVector RetargetedPosition = Source.CurrentPositionNormalized * Target.InitialHeight;
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```
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## RunFKRetarget()
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FChainEncoderFK::EncodePose():
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从骨骼链拷贝全局输入到CurrentGlobalTransforms
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FChainDecoderFK::DecodePose():
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## RunIKRetarget()
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## RunPoleVectorMatching()
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2023-08-18 20:11:04 +08:00
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# UIKRetargetProcessor
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2023-08-21 11:56:17 +08:00
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2023-08-22 13:25:39 +08:00
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# FBX SDK setup for Qt
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2023-08-22 12:09:58 +08:00
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https://help.autodesk.com/view/FBX/2020/ENU/?guid=FBX_Developer_Help_welcome_to_the_fbx_sdk_html
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使用之前建议**仔细查看文档**。FBX Sdk有三种库，分别为动态链接库(dll + lib)、静态链接库(/MD)、静态链接库(/MT)。
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- 动态链接库：使用Qt的导入库功能，导入动态库之后，只需要再添加一行`DEFINES += FBXSDK_SHARED`即可。例如：
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```qmake
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QT += core gui
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greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
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CONFIG += c++17
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DEFINES += FBXSDK_SHARED
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# You can make your code fail to compile if it uses deprecated APIs.
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# In order to do so, uncomment the following line.
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#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
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SOURCES += \
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Common/Common.cpp \
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main.cpp \
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mainwindow.cpp
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HEADERS += \
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Common/Common.h \
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mainwindow.h
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FORMS += \
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mainwindow.ui
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# Default rules for deployment.
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qnx: target.path = /tmp/$${TARGET}/bin
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else: unix:!android: target.path = /opt/$${TARGET}/bin
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!isEmpty(target.path): INSTALLS += target
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win32:CONFIG(release, debug|release): LIBS += -L$$PWD/FBXSdk/lib/vs2022/x64/release/ -llibfbxsdk
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else:win32:CONFIG(debug, debug|release): LIBS += -L$$PWD/FBXSdk/lib/vs2022/x64/debug/ -llibfbxsdk
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INCLUDEPATH += $$PWD/FBXSdk/lib/vs2022/x64/debug
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DEPENDPATH += $$PWD/FBXSdk/lib/vs2022/x64/debug
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INCLUDEPATH += $$PWD/FBXSdk/include
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```
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- 静态链接库(/MD)：使用Qt的导入库功能，导入静态库之后，
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- 静态链接库(/MT)：使用Qt的导入库功能，导入静态库之后，
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## Qt相关设置添加
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https://blog.csdn.net/libaineu2004/article/details/105718847
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Qt在pro中设置运行时库MT、MTd、MD、MDd，重点关注QMAKE_CFLAGS
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多线程调试Dll (/MDd) 对应的是MD_DynamicDebug
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多线程Dll (/MD) 对应的是MD_DynamicRelease
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多线程(/MT) 对应的是MD_StaticRelease
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多线程(/MTd)对应的是MD_StaticDebug
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## /NODEFAULTLIB:library
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```cpp
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win32:CONFIG(release, debug|release): LIBS += -L$$PWD/../LIBRARYNAME/Lib/ -lLIBRARY /NODEFAULTLIB:library
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2023-08-22 13:25:39 +08:00
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```
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# FBX结构
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FBX SDK场景图是通过`FbxScene`类抽象出来的。场景被组织为节点层次结构 ( `FbxNode`)。场景的根节点通过 访问`FbxScene::GetRootNode()`。场景元素（例如网格、灯光或相机）是通过将`FbxNode`与 的子类组合来定义的`FbxNodeAttribute`。
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## 动画
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