unique_ptr<FbxMeshReader> TraverseFbxScene(FbxScene* scene)
{
LOG_VERBOSE("Starting scene traversal");
vector<FbxMesh*> meshes;
FbxNode* skeletonRoot = nullptr;
TraverseFbxNode(scene->GetRootNode(), meshes, skeletonRoot);
if (skeletonRoot)
{
skeletonRoot = skeletonRoot->GetParent();
}
auto mesh = make_unique<FbxMeshReader>(meshes[0]);
if (skeletonRoot != nullptr && CONFIG_KEY("no-export-animation", "true"))
{
LOG("Mesh contains valid skeleton data, but it won't be exported due to \"no-export-animation\" command line flag");
skeletonRoot = nullptr;
}
mesh->ReadMeshData(scene, skeletonRoot);
LOG_VERBOSE("Scene traversal complete");
return mesh;
}
Bone::Bone(FbxNode& node)
: index ( -1 )
, name ( node.GetName() )
, parentName ( node.GetParent() != nullptr ? node.GetParent()->GetName() : "none" )
, numChildren ( unsigned(node.GetChildCount()) )
, transformation ( to_gua::mat4f(node.EvaluateLocalTransform()) )
, offsetMatrix ( scm::math::mat4f::identity() )
{
for (int i = 0; i < node.GetChildCount(); ++i) {
FbxSkeleton const* skelnode { node.GetChild(i)->GetSkeleton() };
if (skelnode && skelnode->GetSkeletonType() == FbxSkeleton::eEffector &&
node.GetChild(i)->GetChildCount() == 0) {
Logger::LOG_DEBUG << node.GetChild(i)->GetName()
<< " is effector, ignoring it" << std::endl;
} else {
auto child = std::make_shared<Bone>(*(node.GetChild(i)));
children.push_back(child);
}
}
}
osgDB::ReaderWriter::ReadResult OsgFbxReader::readFbxNode(
FbxNode* pNode,
bool& bIsBone, int& nLightCount)
{
if (FbxNodeAttribute* lNodeAttribute = pNode->GetNodeAttribute())
{
FbxNodeAttribute::EType attrType = lNodeAttribute->GetAttributeType();
switch (attrType)
{
case FbxNodeAttribute::eNurbs:
case FbxNodeAttribute::ePatch:
case FbxNodeAttribute::eNurbsCurve:
case FbxNodeAttribute::eNurbsSurface:
{
FbxGeometryConverter lConverter(&pSdkManager);
#if FBXSDK_VERSION_MAJOR < 2014
if (!lConverter.TriangulateInPlace(pNode))
#else
if (!lConverter.Triangulate(lNodeAttribute,true,false))
#endif
{
OSG_WARN << "Unable to triangulate FBX NURBS " << pNode->GetName() << std::endl;
}
}
break;
default:
break;
}
}
bIsBone = false;
bool bCreateSkeleton = false;
FbxNodeAttribute::EType lAttributeType = FbxNodeAttribute::eUnknown;
if (pNode->GetNodeAttribute())
{
lAttributeType = pNode->GetNodeAttribute()->GetAttributeType();
if (lAttributeType == FbxNodeAttribute::eSkeleton)
{
bIsBone = true;
}
}
if (!bIsBone && fbxSkeletons.find(pNode) != fbxSkeletons.end())
{
bIsBone = true;
}
unsigned nMaterials = pNode->GetMaterialCount();
std::vector<StateSetContent > stateSetList;
for (unsigned i = 0; i < nMaterials; ++i)
{
FbxSurfaceMaterial* fbxMaterial = pNode->GetMaterial(i);
assert(fbxMaterial);
stateSetList.push_back(fbxMaterialToOsgStateSet.convert(fbxMaterial));
}
osg::NodeList skeletal, children;
int nChildCount = pNode->GetChildCount();
for (int i = 0; i < nChildCount; ++i)
{
FbxNode* pChildNode = pNode->GetChild(i);
if (pChildNode->GetParent() != pNode)
{
//workaround for bug that occurs in some files exported from Blender
continue;
}
bool bChildIsBone = false;
osgDB::ReaderWriter::ReadResult childResult = readFbxNode(
pChildNode, bChildIsBone, nLightCount);
if (childResult.error())
{
return childResult;
}
else if (osg::Node* osgChild = childResult.getNode())
{
if (bChildIsBone)
{
if (!bIsBone) bCreateSkeleton = true;
skeletal.push_back(osgChild);
}
else
{
children.push_back(osgChild);
}
}
}
std::string animName = readFbxAnimation(pNode, pNode->GetName());
osg::Matrix localMatrix;
makeLocalMatrix(pNode, localMatrix);
bool bLocalMatrixIdentity = localMatrix.isIdentity();
osg::ref_ptr<osg::Group> osgGroup;
bool bEmpty = children.empty() && !bIsBone;
switch (lAttributeType)
{
case FbxNodeAttribute::eMesh:
{
size_t bindMatrixCount = boneBindMatrices.size();
osgDB::ReaderWriter::ReadResult meshRes = readFbxMesh(pNode, stateSetList);
if (meshRes.error())
{
return meshRes;
}
else if (osg::Node* node = meshRes.getNode())
{
bEmpty = false;
if (bindMatrixCount != boneBindMatrices.size())
{
//The mesh is skinned therefore the bind matrix will handle all transformations.
localMatrix.makeIdentity();
bLocalMatrixIdentity = true;
}
if (animName.empty() &&
children.empty() &&
skeletal.empty() &&
bLocalMatrixIdentity)
{
return osgDB::ReaderWriter::ReadResult(node);
}
children.insert(children.begin(), node);
}
}
break;
case FbxNodeAttribute::eCamera:
case FbxNodeAttribute::eLight:
{
osgDB::ReaderWriter::ReadResult res =
lAttributeType == FbxNodeAttribute::eCamera ?
readFbxCamera(pNode) : readFbxLight(pNode, nLightCount);
if (res.error())
{
return res;
}
else if (osg::Group* resGroup = dynamic_cast<osg::Group*>(res.getObject()))
{
bEmpty = false;
if (animName.empty() &&
bLocalMatrixIdentity)
{
osgGroup = resGroup;
}
else
{
children.insert(children.begin(), resGroup);
}
}
}
break;
default:
break;
}
if (bEmpty)
{
osgDB::ReaderWriter::ReadResult(0);
}
if (!osgGroup) osgGroup = createGroupNode(pSdkManager, pNode, animName, localMatrix, bIsBone, nodeMap, fbxScene);
osg::Group* pAddChildrenTo = osgGroup.get();
if (bCreateSkeleton)
{
osgAnimation::Skeleton* osgSkeleton = getSkeleton(pNode, fbxSkeletons, skeletonMap);
osgSkeleton->setDefaultUpdateCallback();
pAddChildrenTo->addChild(osgSkeleton);
pAddChildrenTo = osgSkeleton;
}
for (osg::NodeList::iterator it = skeletal.begin(); it != skeletal.end(); ++it)
{
pAddChildrenTo->addChild(it->get());
}
for (osg::NodeList::iterator it = children.begin(); it != children.end(); ++it)
{
pAddChildrenTo->addChild(it->get());
}
return osgDB::ReaderWriter::ReadResult(osgGroup.get());
}
bool UnFbx::FFbxImporter::ImportAnimation(USkeleton* Skeleton, UAnimSequence * DestSeq, const FString& FileName, TArray<FbxNode*>& SortedLinks, TArray<FbxNode*>& NodeArray, FbxAnimStack* CurAnimStack, const int32 ResampleRate, const FbxTimeSpan AnimTimeSpan)
{
// @todo : the length might need to change w.r.t. sampling keys
FbxTime SequenceLength = AnimTimeSpan.GetDuration();
float PreviousSequenceLength = DestSeq->SequenceLength;
// if you have one pose(thus 0.f duration), it still contains animation, so we'll need to consider that as MINIMUM_ANIMATION_LENGTH time length
DestSeq->SequenceLength = FGenericPlatformMath::Max<float>(SequenceLength.GetSecondDouble(), MINIMUM_ANIMATION_LENGTH);
if(PreviousSequenceLength > MINIMUM_ANIMATION_LENGTH && DestSeq->RawCurveData.FloatCurves.Num() > 0)
{
// The sequence already existed when we began the import. We need to scale the key times for all curves to match the new
// duration before importing over them. This is to catch any user-added curves
float ScaleFactor = DestSeq->SequenceLength / PreviousSequenceLength;
for(FFloatCurve& Curve : DestSeq->RawCurveData.FloatCurves)
{
Curve.FloatCurve.ScaleCurve(0.0f, ScaleFactor);
}
}
if (ImportOptions->bDeleteExistingMorphTargetCurves)
{
for (int32 CurveIdx=0; CurveIdx<DestSeq->RawCurveData.FloatCurves.Num(); ++CurveIdx)
{
auto& Curve = DestSeq->RawCurveData.FloatCurves[CurveIdx];
if (Curve.GetCurveTypeFlag(ACF_DrivesMorphTarget))
{
DestSeq->RawCurveData.FloatCurves.RemoveAt(CurveIdx, 1, false);
--CurveIdx;
}
}
DestSeq->RawCurveData.FloatCurves.Shrink();
}
//
// import blend shape curves
//
{
GWarn->BeginSlowTask( LOCTEXT("BeginImportMorphTargetCurves", "Importing Morph Target Curves"), true);
for ( int32 NodeIndex = 0; NodeIndex < NodeArray.Num(); NodeIndex++ )
{
// consider blendshape animation curve
FbxGeometry* Geometry = (FbxGeometry*)NodeArray[NodeIndex]->GetNodeAttribute();
if (Geometry)
{
int32 BlendShapeDeformerCount = Geometry->GetDeformerCount(FbxDeformer::eBlendShape);
for(int32 BlendShapeIndex = 0; BlendShapeIndex<BlendShapeDeformerCount; ++BlendShapeIndex)
{
FbxBlendShape* BlendShape = (FbxBlendShape*)Geometry->GetDeformer(BlendShapeIndex, FbxDeformer::eBlendShape);
const int32 BlendShapeChannelCount = BlendShape->GetBlendShapeChannelCount();
FString BlendShapeName = UTF8_TO_TCHAR(MakeName(BlendShape->GetName()));
for(int32 ChannelIndex = 0; ChannelIndex<BlendShapeChannelCount; ++ChannelIndex)
{
FbxBlendShapeChannel* Channel = BlendShape->GetBlendShapeChannel(ChannelIndex);
if(Channel)
{
FString ChannelName = UTF8_TO_TCHAR(MakeName(Channel->GetName()));
// Maya adds the name of the blendshape and an underscore to the front of the channel name, so remove it
if(ChannelName.StartsWith(BlendShapeName))
{
ChannelName = ChannelName.Right(ChannelName.Len() - (BlendShapeName.Len()+1));
}
FbxAnimCurve* Curve = Geometry->GetShapeChannel(BlendShapeIndex, ChannelIndex, (FbxAnimLayer*)CurAnimStack->GetMember(0));
if (Curve && Curve->KeyGetCount() > 0)
{
FFormatNamedArguments Args;
Args.Add(TEXT("BlendShape"), FText::FromString(ChannelName));
const FText StatusUpate = FText::Format(LOCTEXT("ImportingMorphTargetCurvesDetail", "Importing Morph Target Curves [{BlendShape}]"), Args);
GWarn->StatusUpdate(NodeIndex + 1, NodeArray.Num(), StatusUpate);
// now see if we have one already exists. If so, just overwrite that. if not, add new one.
ImportCurveToAnimSequence(DestSeq, *ChannelName, Curve, ACF_DrivesMorphTarget | ACF_TriggerEvent, AnimTimeSpan, 0.01f /** for some reason blend shape values are coming as 100 scaled **/);
}
}
}
}
}
}
GWarn->EndSlowTask();
}
//
// importing custom attribute START
//
if (ImportOptions->bImportCustomAttribute)
{
GWarn->BeginSlowTask( LOCTEXT("BeginImportMorphTargetCurves", "Importing Custom Attirubte Curves"), true);
const int32 TotalLinks = SortedLinks.Num();
int32 CurLinkIndex=0;
for(auto Node: SortedLinks)
{
FbxProperty Property = Node->GetFirstProperty();
while (Property.IsValid())
{
FbxAnimCurveNode* CurveNode = Property.GetCurveNode();
// do this if user defined and animated and leaf node
if( CurveNode && Property.GetFlag(FbxPropertyAttr::eUserDefined) &&
CurveNode->IsAnimated() && IsSupportedCurveDataType(Property.GetPropertyDataType().GetType()) )
{
FString CurveName = UTF8_TO_TCHAR(CurveNode->GetName());
UE_LOG(LogFbx, Log, TEXT("CurveName : %s"), *CurveName );
int32 TotalCount = CurveNode->GetChannelsCount();
for (int32 ChannelIndex=0; ChannelIndex<TotalCount; ++ChannelIndex)
{
FbxAnimCurve * AnimCurve = CurveNode->GetCurve(ChannelIndex);
FString ChannelName = CurveNode->GetChannelName(ChannelIndex).Buffer();
if (AnimCurve)
{
FString FinalCurveName;
if (TotalCount == 1)
{
FinalCurveName = CurveName;
}
else
{
FinalCurveName = CurveName + "_" + ChannelName;
}
FFormatNamedArguments Args;
Args.Add(TEXT("CurveName"), FText::FromString(FinalCurveName));
const FText StatusUpate = FText::Format(LOCTEXT("ImportingCustomAttributeCurvesDetail", "Importing Custom Attribute [{CurveName}]"), Args);
GWarn->StatusUpdate(CurLinkIndex + 1, TotalLinks, StatusUpate);
ImportCurveToAnimSequence(DestSeq, FinalCurveName, AnimCurve, ACF_DefaultCurve, AnimTimeSpan);
}
}
}
Property = Node->GetNextProperty(Property);
}
CurLinkIndex++;
}
GWarn->EndSlowTask();
}
// importing custom attribute END
const bool bSourceDataExists = (DestSeq->SourceRawAnimationData.Num() > 0);
TArray<AnimationTransformDebug::FAnimationTransformDebugData> TransformDebugData;
int32 TotalNumKeys = 0;
const FReferenceSkeleton& RefSkeleton = Skeleton->GetReferenceSkeleton();
// import animation
{
GWarn->BeginSlowTask( LOCTEXT("BeginImportAnimation", "Importing Animation"), true);
TArray<struct FRawAnimSequenceTrack>& RawAnimationData = bSourceDataExists? DestSeq->SourceRawAnimationData : DestSeq->RawAnimationData;
DestSeq->TrackToSkeletonMapTable.Empty();
DestSeq->AnimationTrackNames.Empty();
RawAnimationData.Empty();
TArray<FName> FbxRawBoneNames;
FillAndVerifyBoneNames(Skeleton, SortedLinks, FbxRawBoneNames, FileName);
UnFbx::FFbxImporter* FbxImporter = UnFbx::FFbxImporter::GetInstance();
const bool bPreserveLocalTransform = FbxImporter->GetImportOptions()->bPreserveLocalTransform;
// Build additional transform matrix
UFbxAnimSequenceImportData* TemplateData = Cast<UFbxAnimSequenceImportData>(DestSeq->AssetImportData);
FbxAMatrix FbxAddedMatrix;
BuildFbxMatrixForImportTransform(FbxAddedMatrix, TemplateData);
FMatrix AddedMatrix = Converter.ConvertMatrix(FbxAddedMatrix);
const int32 NumSamplingKeys = FMath::FloorToInt(AnimTimeSpan.GetDuration().GetSecondDouble() * ResampleRate);
const FbxTime TimeIncrement = (NumSamplingKeys > 1)? AnimTimeSpan.GetDuration() / (NumSamplingKeys - 1) : AnimTimeSpan.GetDuration();
for(int32 SourceTrackIdx = 0; SourceTrackIdx < FbxRawBoneNames.Num(); ++SourceTrackIdx)
{
int32 NumKeysForTrack = 0;
// see if it's found in Skeleton
FName BoneName = FbxRawBoneNames[SourceTrackIdx];
int32 BoneTreeIndex = RefSkeleton.FindBoneIndex(BoneName);
// update status
FFormatNamedArguments Args;
Args.Add(TEXT("TrackName"), FText::FromName(BoneName));
Args.Add(TEXT("TotalKey"), FText::AsNumber(NumSamplingKeys));
Args.Add(TEXT("TrackIndex"), FText::AsNumber(SourceTrackIdx+1));
Args.Add(TEXT("TotalTracks"), FText::AsNumber(FbxRawBoneNames.Num()));
const FText StatusUpate = FText::Format(LOCTEXT("ImportingAnimTrackDetail", "Importing Animation Track [{TrackName}] ({TrackIndex}/{TotalTracks}) - TotalKey {TotalKey}"), Args);
GWarn->StatusForceUpdate(SourceTrackIdx + 1, FbxRawBoneNames.Num(), StatusUpate);
if (BoneTreeIndex!=INDEX_NONE)
{
bool bSuccess = true;
FRawAnimSequenceTrack RawTrack;
RawTrack.PosKeys.Empty();
RawTrack.RotKeys.Empty();
RawTrack.ScaleKeys.Empty();
AnimationTransformDebug::FAnimationTransformDebugData NewDebugData;
FbxNode* Link = SortedLinks[SourceTrackIdx];
FbxNode * LinkParent = Link->GetParent();
for(FbxTime CurTime = AnimTimeSpan.GetStart(); CurTime <= AnimTimeSpan.GetStop(); CurTime += TimeIncrement)
{
// save global trasnform
FbxAMatrix GlobalMatrix = Link->EvaluateGlobalTransform(CurTime);
// we'd like to verify this before going to Transform.
// currently transform has tons of NaN check, so it will crash there
FMatrix GlobalUEMatrix = Converter.ConvertMatrix(GlobalMatrix);
if (GlobalUEMatrix.ContainsNaN())
{
bSuccess = false;
AddTokenizedErrorMessage(FTokenizedMessage::Create(EMessageSeverity::Error, FText::Format(LOCTEXT("Error_InvalidTransform",
"Track {0} contains invalid transform. Could not import the track."), FText::FromName(BoneName))), FFbxErrors::Animation_TransformError);
break;
}
FTransform GlobalTransform = Converter.ConvertTransform(GlobalMatrix);
if (GlobalTransform.ContainsNaN())
{
bSuccess = false;
AddTokenizedErrorMessage(FTokenizedMessage::Create(EMessageSeverity::Error, FText::Format(LOCTEXT("Error_InvalidUnrealTransform",
"Track {0} did not yeild valid transform. Please report this to animation team."), FText::FromName(BoneName))), FFbxErrors::Animation_TransformError);
break;
}
// debug data, including import transformation
FTransform AddedTransform(AddedMatrix);
NewDebugData.SourceGlobalTransform.Add(GlobalTransform * AddedTransform);
FTransform LocalTransform;
if( !bPreserveLocalTransform && LinkParent)
{
// I can't rely on LocalMatrix. I need to recalculate quaternion/scale based on global transform if Parent exists
FbxAMatrix ParentGlobalMatrix = Link->GetParent()->EvaluateGlobalTransform(CurTime);
FTransform ParentGlobalTransform = Converter.ConvertTransform(ParentGlobalMatrix);
LocalTransform = GlobalTransform.GetRelativeTransform(ParentGlobalTransform);
NewDebugData.SourceParentGlobalTransform.Add(ParentGlobalTransform);
}
else
{
FbxAMatrix& LocalMatrix = Link->EvaluateLocalTransform(CurTime);
FbxVector4 NewLocalT = LocalMatrix.GetT();
FbxVector4 NewLocalS = LocalMatrix.GetS();
FbxQuaternion NewLocalQ = LocalMatrix.GetQ();
LocalTransform.SetTranslation(Converter.ConvertPos(NewLocalT));
LocalTransform.SetScale3D(Converter.ConvertScale(NewLocalS));
LocalTransform.SetRotation(Converter.ConvertRotToQuat(NewLocalQ));
NewDebugData.SourceParentGlobalTransform.Add(FTransform::Identity);
}
if(TemplateData && BoneTreeIndex == 0)
{
// If we found template data earlier, apply the import transform matrix to
// the root track.
LocalTransform.SetFromMatrix(LocalTransform.ToMatrixWithScale() * AddedMatrix);
}
if (LocalTransform.ContainsNaN())
{
bSuccess = false;
AddTokenizedErrorMessage(FTokenizedMessage::Create(EMessageSeverity::Error, FText::Format(LOCTEXT("Error_InvalidUnrealLocalTransform",
"Track {0} did not yeild valid local transform. Please report this to animation team."), FText::FromName(BoneName))), FFbxErrors::Animation_TransformError);
break;
}
RawTrack.ScaleKeys.Add(LocalTransform.GetScale3D());
RawTrack.PosKeys.Add(LocalTransform.GetTranslation());
RawTrack.RotKeys.Add(LocalTransform.GetRotation());
NewDebugData.RecalculatedLocalTransform.Add(LocalTransform);
++NumKeysForTrack;
}
if (bSuccess)
{
//add new track
int32 NewTrackIdx = RawAnimationData.Add(RawTrack);
DestSeq->AnimationTrackNames.Add(BoneName);
NewDebugData.SetTrackData(NewTrackIdx, BoneTreeIndex, BoneName);
// add mapping to skeleton bone track
DestSeq->TrackToSkeletonMapTable.Add(FTrackToSkeletonMap(BoneTreeIndex));
TransformDebugData.Add(NewDebugData);
}
}
TotalNumKeys = FMath::Max( TotalNumKeys, NumKeysForTrack );
}
DestSeq->NumFrames = TotalNumKeys;
GWarn->EndSlowTask();
}
// compress animation
{
GWarn->BeginSlowTask( LOCTEXT("BeginCompressAnimation", "Compress Animation"), true);
GWarn->StatusForceUpdate(1, 1, LOCTEXT("CompressAnimation", "Compressing Animation"));
// if source data exists, you should bake it to Raw to apply
if(bSourceDataExists)
{
DestSeq->BakeTrackCurvesToRawAnimation();
}
else
{
// otherwise just compress
DestSeq->PostProcessSequence();
}
// run debug mode
AnimationTransformDebug::OutputAnimationTransformDebugData(TransformDebugData, TotalNumKeys, RefSkeleton);
GWarn->EndSlowTask();
}
return true;
}