std::string readFbxAnimation(KFbxNode* pNode,
KFbxScene& fbxScene,
osg::ref_ptr<osgAnimation::AnimationManagerBase>& pAnimManager,
const char* targetName)
{
std::string result;
for (int i = 0; i < fbxScene.GetSrcObjectCount(FBX_TYPE(KFbxAnimStack)); ++i)
{
KFbxAnimStack* pAnimStack = KFbxCast<KFbxAnimStack>(fbxScene.GetSrcObject(FBX_TYPE(KFbxAnimStack), i));
int nbAnimLayers = pAnimStack->GetMemberCount(FBX_TYPE(KFbxAnimLayer));
const char* pTakeName = pAnimStack->GetName();
if (!pTakeName || !*pTakeName)
continue;
for (int j = 0; j < nbAnimLayers; j++)
{
KFbxAnimLayer* pAnimLayer = pAnimStack->GetMember(FBX_TYPE(KFbxAnimLayer), j);
if (osgAnimation::Animation* pAnimation = readFbxAnimation(
pNode, pAnimLayer, pTakeName, targetName, pAnimManager))
{
result = targetName;
}
}
}
return result;
}
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());
}