114 lines
3.3 KiB
Markdown
114 lines
3.3 KiB
Markdown
---
|
||
title: FBXAnimation导入逻辑
|
||
date: 2023-12-11 11:28:36
|
||
excerpt:
|
||
tags:
|
||
rating: ⭐
|
||
---
|
||
# BVHImport插件中的案例
|
||
```c++
|
||
UObject* UBVHImportFactory::FactoryCreateFile(UClass* InClass, UObject* InParent, FName InName, EObjectFlags Flags, const FString& FileName, const TCHAR* Parms, FFeedbackContext* Warn, bool& bOutOperationCanceled)
|
||
{
|
||
if (!shouldImport) {
|
||
return nullptr;
|
||
}
|
||
bool fileSuccess = BVHFile.ImportData(TCHAR_TO_ANSI(*FileName));
|
||
|
||
const bool bIsUnattended = (IsAutomatedImport()
|
||
|| FApp::IsUnattended()
|
||
|| IsRunningCommandlet()
|
||
|| GIsRunningUnattendedScript);
|
||
|
||
// Check if it's a re-import
|
||
if (InParent != nullptr)
|
||
{
|
||
UObject* ExistingObject = StaticFindObject(UObject::StaticClass(), InParent, *InName.ToString());
|
||
if (ExistingObject)
|
||
{
|
||
//reimport逻辑略
|
||
}
|
||
}
|
||
|
||
if (fileSuccess)
|
||
{
|
||
UAnimSequence* AnimSequence = NewObject<UAnimSequence>(InParent, InName, Flags & ~EObjectFlags::RF_Transactional);
|
||
if (Skeleton == NULL) {
|
||
//创建骨骼资产略
|
||
}
|
||
else {
|
||
AnimSequence->SetSkeleton(Skeleton);//Skeleton bvhSkel
|
||
AnimSequence->SetPreviewMesh(PreviewMesh);
|
||
}
|
||
ExtractAnimDataFromBVHFile(AnimSequence);
|
||
return AnimSequence;
|
||
|
||
}
|
||
return nullptr;
|
||
|
||
}
|
||
```
|
||
|
||
```c++
|
||
void UBVHImportFactory::ExtractAnimDataFromBVHFile(UAnimSequence* AnimSequence) {
|
||
if (AnimSequence)
|
||
{
|
||
// create animation
|
||
IAnimationDataController& Controller = AnimSequence->GetController();
|
||
Controller.OpenBracket(LOCTEXT("ImportBVHAnimation", "Importing BVH Animation"));
|
||
Controller.ResetModel();
|
||
|
||
// Write animation data into animation sequence.
|
||
// Extract transform of hip to create root motion.
|
||
const FReferenceSkeleton& RefSkeleton = AnimSequence->GetSkeleton()->GetReferenceSkeleton();
|
||
const FName RootName = RefSkeleton.GetBoneName(0);
|
||
const int32 NumOfKeys = BVHFile.Root->FrameOffset.Num();
|
||
|
||
AnimSequence->ImportFileFramerate = (float)BVHFile.Header.DataRate;
|
||
AnimSequence->ImportResampleFramerate = BVHFile.Header.DataRate;
|
||
|
||
Controller.SetPlayLength(float(NumOfKeys - 1) / (float)BVHFile.Header.DataRate);
|
||
Controller.SetFrameRate(FFrameRate(BVHFile.Header.DataRate, 1));
|
||
|
||
RecursiveReadKeysFromNode(Controller, BVHFile.Root.Get());
|
||
|
||
Controller.NotifyPopulated();
|
||
Controller.CloseBracket();
|
||
|
||
AnimSequence->AdditiveAnimType = EAdditiveAnimationType::AAT_None;
|
||
AnimSequence->PostEditChange();
|
||
FAssetRegistryModule::AssetCreated(AnimSequence);
|
||
AnimSequence->MarkPackageDirty();
|
||
}
|
||
}
|
||
```
|
||
|
||
```c++
|
||
void UBVHImportFactory::RecursiveReadKeysFromNode(IAnimationDataController& Controller, FNode* Node)
|
||
{
|
||
if (Node)
|
||
{
|
||
Controller.AddBoneTrack(Node->Name,false);
|
||
Controller.SetBoneTrackKeys(Node->Name, Node->FrameOffset, Node->FrameQuat, Node->FrameScale,false);
|
||
if (Node->Children.Num() > 0)
|
||
{
|
||
for (NodePtr Child : Node->Children)
|
||
{
|
||
RecursiveReadKeysFromNode(Controller, Child.Get());
|
||
}
|
||
}
|
||
}
|
||
}
|
||
```
|
||
|
||
# UE5中使用FBXSDK导入动画逻辑
|
||
- UAnimSequence * UEditorEngine::ImportFbxAnimation
|
||
- UAnimSequence * UnFbx::FFbxImporter::ImportAnimations
|
||
|
||
UE5中FBXSDK相关函数调用方式：
|
||
- bool FFbxImporter::OpenFile(FString Filename)
|
||
- bool FFbxImporter::ImportFile(FString Filename, bool bPreventMaterialNameClash /*=false*/)
|
||
|
||
# 参考
|
||
1. Interchange\\Runtime\\Source\\Parsers
|
||
1. InterchangeFbxParser.Build.cs
|
||
2. FbxInclude.h：FBXSDK头文件包含问题。 |