Hi,
I am trying to export a character using the FBX-SDK. I can export the mesh and the bones correctly, but adding weights to the mesh is not working correctly. The file without weights looks like this (Left: Blender, Right: FbxReview):
The file with weights looks like this:
The weights of the vertices are actually correct (if I move a bone the corresponding part of the mesh moves), but the position is off. I suspect it has something to do with SetTransformMatrix or SetTransformLinkMatrix? I also had some problems with the rotation order (had to set it to ZXY) and inherit types (had to set it to RSrs) before, but I don't think that is relevant here since the matrices are set directly (but maybe I am wrong?).
My code for adding the weights looks like this:
if (obj->hasWeights()) {
FbxAMatrix meshMatrix = meshNode->EvaluateGlobalTransform();
FbxSkin* skin = obj->addSkin(manager);
FbxPose* bindPose = FbxPose::Create(manager, "BindPose");
bindPose->SetIsBindPose(true);
std::map<Bone*, std::list<struct VertexWeight>> weights = obj->getVertexWeights();
for (std::pair<Bone*, std::list<struct VertexWeight>> pair : weights) {
Bone* curBone = pair.first;
FbxCluster* cluster = curBone->createCluster(manager);
for (VertexWeight weight : pair.second) {
cluster->AddControlPointIndex(weight.vertexIndex, weight.weight);
}
FbxNode* boneNode = curBone->getNode();
FbxAMatrix boneMatrix = boneNode->EvaluateGlobalTransform();
cluster->SetTransformMatrix(meshMatrix);
cluster->SetTransformLinkMatrix(boneMatrix);
skin->AddCluster(cluster);
FbxNode* curNode = boneNode;
while (curNode!=nullptr) {
if(bindPose->Find(curNode)==-1) {
bindPose->Add(curNode, curNode->EvaluateGlobalTransform());
}
curNode = curNode->GetParent();
}
}
scene->AddPose(bindPose);
}FbxSkin * UObject::addSkin(FbxManager * manager)
{
this->skin = FbxSkin::Create(manager, this->name.c_str());
((FbxGeometry*)this->node->GetNodeAttribute())->AddDeformer(this->skin);
return this->skin;
}FbxCluster * Bone::createCluster(FbxManager * manager)
{
this->cluster = FbxCluster::Create(manager, this->name.c_str());
this->cluster->SetLink(this->node);
this->cluster->SetLinkMode(FbxCluster::ELinkMode::eNormalize);
return this->cluster;
}Any ideas or hints are much appreciated.
Thanks