vault backup: 2023-11-06 14:49:18
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@ -1,44 +1,10 @@
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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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title: FBX相关笔记
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date: 2023-11-06 11:45:14
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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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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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## 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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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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# UIKRetargetProcessor
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# FBX SDK setup for Qt
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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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@ -146,73 +112,7 @@ FBX SDK场景图是通过`FbxScene`类抽象出来的。场景被组织为节点
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每个动画数据都存在对应的节点的属性中（Maya中可以给Shape的属性K帧），可以通过类似`lAnimCurve = pNode->LclTranslation.GetCurve(pAnimLayer, FBXSDK_CURVENODE_COMPONENT_Y);`的方式取得动画曲线。
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UE导出的FBX相关属性为：
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```json
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AnimationStack: 1767515526080, "AnimStack::Unreal Take", "" {
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Properties70: {
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P: "Description", "KString", "", "", "Animation Take for Unreal."
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P: "LocalStop", "KTime", "Time", "",183205094709
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}
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}
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AnimationLayer: 1770224712128, "AnimLayer::Base Layer", "" {
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}
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NodeAttribute: 1767517959504, "NodeAttribute::Root", "Root" {
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TypeFlags: "Null", "Skeleton", "Root"
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}
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NodeAttribute: 1767517960848, "NodeAttribute::Pelvis", "LimbNode" {
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TypeFlags: "Skeleton"
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}
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NodeAttribute: 1767517959696, "NodeAttribute::L_Hip", "LimbNode" {
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TypeFlags: "Skeleton"
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}
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NodeAttribute: 1767517960080, "NodeAttribute::L_Knee", "LimbNode" {
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TypeFlags: "Skeleton"
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}
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AnimationCurve: 1770213770432, "AnimCurve::", "" {
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Default: 0
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KeyVer: 4009
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KeyTime: *120 {
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a: 0,1539538600,3079077200,4618615800,6158154400,7697693000,9237231600,10776770200,12316308800,13855847400,15395386000,16934924600,18474463200,20014001800,21553540400,23093079000,24632617600,26172156200,27711694800,29251233400,30790772000,32330310600,33869849200,35409387800,36948926400,38488465000,40028003600,41567542200,43107080800,44646619400,46186158000,47725696600,49265235200,50804773800,52344312400,53883851000,55423389600,56962928200,58502466800,60042005400,61581544000,63121082600,64660621200,66200159800,67739698400,69279237000,70818775600,72358314200,73897852800,75437391400,76976930000,78516468600,80056007200,81595545800,83135084400,84674623000,86214161600,87753700200,89293238800,90832777400,92372316000,93911854600,95451393200,96990931800,98530470400,100070009000,101609547600,103149086200,104688624800,106228163400,107767702000,109307240600,110846779200,112386317800,113925856400,115465395000,117004933600,118544472200,120084010800,121623549400,123163088000,124702626600,126242165200,127781703800,129321242400,130860781000,132400319600,133939858200,135479396800,137018935400,138558474000,140098012600,141637551200,143177089800,144716628400,146256167000,147795705600,149335244200,150874782800,152414321400,153953860000,155493398600,157032937200,158572475800,160112014400,161651553000,163191091600,164730630200,166270168800,167809707400,169349246000,170888784600,172428323200,173967861800,175507400400,177046939000,178586477600,180126016200,181665554800,183205093400
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}
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KeyValueFloat: *120 {
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a: -0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0,-0
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}
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;KeyAttrFlags: Cubic|TangeantAuto|GenericTimeIndependent, Constant|ConstantStandard
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KeyAttrFlags: *2 {
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a: 8456,8194
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}
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;KeyAttrDataFloat: RightAuto:0, NextLeftAuto:0; RightSlope:0, NextLeftSlope:0, RightWeight:0.333333, NextLeftWeight:0.333333, RightVelocity:0, NextLeftVelocity:0
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KeyAttrDataFloat: *8 {
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a: 0,0,218434821,0,0,0,218434821,0
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}
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KeyAttrRefCount: *2 {
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a: 119,1
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}
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}
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AnimationCurve: 1770213768992, "AnimCurve::", "" {
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Default: 0
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KeyVer: 4009
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KeyTime: *120 {
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a: 0,1539538600,3079077200,4618615800,6158154400,7697693000,9237231600,10776770200,12316308800,13855847400,15395386000,16934924600,18474463200,20014001800,21553540400,23093079000,24632617600,26172156200,27711694800,29251233400,30790772000,32330310600,33869849200,35409387800,36948926400,38488465000,40028003600,41567542200,43107080800,44646619400,46186158000,47725696600,49265235200,50804773800,52344312400,53883851000,55423389600,56962928200,58502466800,60042005400,61581544000,63121082600,64660621200,66200159800,67739698400,69279237000,70818775600,72358314200,73897852800,75437391400,76976930000,78516468600,80056007200,81595545800,83135084400,84674623000,86214161600,87753700200,89293238800,90832777400,92372316000,93911854600,95451393200,96990931800,98530470400,100070009000,101609547600,103149086200,104688624800,106228163400,107767702000,109307240600,110846779200,112386317800,113925856400,115465395000,117004933600,118544472200,120084010800,121623549400,123163088000,124702626600,126242165200,127781703800,129321242400,130860781000,132400319600,133939858200,135479396800,137018935400,138558474000,140098012600,141637551200,143177089800,144716628400,146256167000,147795705600,149335244200,150874782800,152414321400,153953860000,155493398600,157032937200,158572475800,160112014400,161651553000,163191091600,164730630200,166270168800,167809707400,169349246000,170888784600,172428323200,173967861800,175507400400,177046939000,178586477600,180126016200,181665554800,183205093400
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}
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KeyValueFloat: *120 {
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a: 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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}
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;KeyAttrFlags: Cubic|TangeantAuto|GenericTimeIndependent, Constant|ConstantStandard
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KeyAttrFlags: *2 {
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a: 8456,8194
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}
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;KeyAttrDataFloat: RightAuto:0, NextLeftAuto:0; RightSlope:0, NextLeftSlope:0, RightWeight:0.333333, NextLeftWeight:0.333333, RightVelocity:0, NextLeftVelocity:0
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KeyAttrDataFloat: *8 {
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a: 0,0,218434821,0,0,0,218434821,0
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}
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KeyAttrRefCount: *2 {
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a: 119,1
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}
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}
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```
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添加动画关键帧的方式
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45
03-UnrealEngine/Animation/UE5动画重定向核心逻辑笔记.md
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45
03-UnrealEngine/Animation/UE5动画重定向核心逻辑笔记.md
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@ -0,0 +1,45 @@
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---
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title: UE5动画重定向核心逻辑笔记
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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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# 前言
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# ConvertAnimation()
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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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FRetargetSkeleton：
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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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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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# UIKRetargetProcessor
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@ -198,3 +198,5 @@ static const char* const kUE4MannequinToMixamo_BoneNamesMapping[] = {
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"thumb_03_r", "RightHandThumb3",
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// Un-mapped bones (at the moment). Here for reference.
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//"lowerarm_twist_01_l", nullptr, //"upperarm_twist_01_l", nullptr, //"lowerarm_twist_01_r", nullptr, //"upperarm_twist_01_r", nullptr, //"calf_twist_01_l", nullptr, //"thigh_twist_01_l", nullptr, //"calf_twist_01_r", nullptr, //"thigh_twist_01_r", nullptr, //"ik_foot_root", nullptr, //"ik_foot_l", nullptr, //"ik_foot_r", nullptr, //"ik_hand_root", nullptr, //"ik_hand_gun", nullptr, //"ik_hand_l", nullptr, //"ik_hand_r", nullptr,};
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# EasyPose
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