/**
* Adds FBX skeleton nodes to the FbxScene based on the skeleton in the given USkeletalMesh, and fills
* the given array with the nodes created
*/
FbxNode* FFbxExporter::CreateSkeleton(const USkeletalMesh* SkelMesh, TArray<FbxNode*>& BoneNodes)
{
const FReferenceSkeleton& RefSkeleton= SkelMesh->RefSkeleton;
if(RefSkeleton.GetNum() == 0)
{
return NULL;
}
// Create a list of the nodes we create for each bone, so that children can
// later look up their parent
BoneNodes.Reserve(RefSkeleton.GetNum());
for(int32 BoneIndex = 0; BoneIndex < RefSkeleton.GetNum(); ++BoneIndex)
{
const FMeshBoneInfo& CurrentBone = RefSkeleton.GetRefBoneInfo()[BoneIndex];
const FTransform& BoneTransform = RefSkeleton.GetRefBonePose()[BoneIndex];
FbxString BoneName = Converter.ConvertToFbxString(CurrentBone.ExportName);
// Create the node's attributes
FbxSkeleton* SkeletonAttribute = FbxSkeleton::Create(Scene, BoneName.Buffer());
if(BoneIndex)
{
SkeletonAttribute->SetSkeletonType(FbxSkeleton::eLimbNode);
//SkeletonAttribute->Size.Set(1.0);
}
else
{
SkeletonAttribute->SetSkeletonType(FbxSkeleton::eRoot);
//SkeletonAttribute->Size.Set(1.0);
}
// Create the node
FbxNode* BoneNode = FbxNode::Create(Scene, BoneName.Buffer());
BoneNode->SetNodeAttribute(SkeletonAttribute);
// Set the bone node's local orientation
FVector UnrealRotation = BoneTransform.GetRotation().Euler();
FbxVector4 LocalPos = Converter.ConvertToFbxPos(BoneTransform.GetTranslation());
FbxVector4 LocalRot = Converter.ConvertToFbxRot(UnrealRotation);
BoneNode->LclTranslation.Set(LocalPos);
BoneNode->LclRotation.Set(LocalRot);
// If this is not the root bone, attach it to its parent
if(BoneIndex)
{
BoneNodes[CurrentBone.ParentIndex]->AddChild(BoneNode);
}
// Add the node to the list of nodes, in bone order
BoneNodes.Push(BoneNode);
}
return BoneNodes[0];
}
void ExportBones(const Value& obj)
{
const Value& boneName = obj["BoneName"];
if (boneName.IsNull())
{
return;
}
//string name = obj["Name"].GetString();
const Value& parentIndex = obj["ParentIndex"];
const Value& boneTransform = obj["BoneTransform"];
fbxBones.resize(boneName.Size());
for (uint32_t i = 0; i < fbxBones.size(); i++)
{
FbxNode* boneNode = FbxNode::Create(pScene, boneName[i].GetString());
fbxBones[i] = boneNode;
double x, y, z, w;
x = boneTransform[i * 7 + 0].GetDouble();
x = -x;
y = boneTransform[i * 7 + 1].GetDouble();
z = boneTransform[i * 7 + 2].GetDouble();
boneNode->LclTranslation.Set(FbxDouble3(x, y, z));
x = boneTransform[i * 7 + 3].GetDouble();
y = boneTransform[i * 7 + 4].GetDouble();
z = boneTransform[i * 7 + 5].GetDouble();
w = boneTransform[i * 7 + 6].GetDouble();
FbxSkeleton* pSkeleton = FbxSkeleton::Create(pScene, boneName[i].GetString());
int parent = parentIndex[i].GetInt();
if (parent == -1) {
pSkeleton->SetSkeletonType(FbxSkeleton::eRoot);
}
else {
pSkeleton->SetSkeletonType(FbxSkeleton::eLimbNode);
pSkeleton->Size.Set(0.1);
}
boneNode->SetNodeAttribute(pSkeleton);
}
for (uint32_t i = 0; i < fbxBones.size(); i++) {
int parent = parentIndex[i].GetInt();
if (parent == -1) {
pScene->GetRootNode()->AddChild(fbxBones[i]);
}
else {
fbxBones[parent]->AddChild(fbxBones[i]);
}
}
FbxPose* lPose = FbxPose::Create(pScene, boneName[0].GetString());
// default pose type is rest pose, so we need to set the type as bind pose
lPose->SetIsBindPose(true);
for (uint32_t i = 0; i < fbxBones.size(); i++) {
FbxNode* lKFbxNode = fbxBones[i];
FbxMatrix lBindMatrix = lKFbxNode->EvaluateGlobalTransform();
lPose->Add(lKFbxNode, lBindMatrix);
}
pScene->AddPose(lPose);
}
