osg::ref_ptr<osg::Node> attach(osg::ref_ptr<osg::Node> toAttach, osg::Node *master, const std::string &filter, osg::Group* attachNode)
{
if (dynamic_cast<SceneUtil::Skeleton*>(toAttach.get()))
{
osg::ref_ptr<osg::Group> handle = new osg::Group;
osg::UserDataContainer* udc = toAttach->getUserDataContainer();
CopyRigVisitor copyVisitor(handle, filter);
toAttach->accept(copyVisitor);
copyVisitor.doCopy();
if (handle->getNumChildren() == 1)
{
osg::ref_ptr<osg::Node> newHandle = handle->getChild(0);
handle->removeChild(newHandle);
master->asGroup()->addChild(newHandle);
newHandle->setUserDataContainer(udc);
return newHandle;
}
else
{
master->asGroup()->addChild(handle);
handle->setUserDataContainer(udc);
return handle;
}
}
else
{
FindByNameVisitor findBoneOffset("BoneOffset");
toAttach->accept(findBoneOffset);
osg::ref_ptr<osg::PositionAttitudeTransform> trans;
if (findBoneOffset.mFoundNode)
{
osg::MatrixTransform* boneOffset = dynamic_cast<osg::MatrixTransform*>(findBoneOffset.mFoundNode);
if (!boneOffset)
throw std::runtime_error("BoneOffset must be a MatrixTransform");
trans = new osg::PositionAttitudeTransform;
trans->setPosition(boneOffset->getMatrix().getTrans());
// The BoneOffset rotation seems to be incorrect
trans->setAttitude(osg::Quat(osg::DegreesToRadians(-90.f), osg::Vec3f(1,0,0)));
// Now that we used it, get rid of the redundant node.
if (boneOffset->getNumChildren() == 0 && boneOffset->getNumParents() == 1)
boneOffset->getParent(0)->removeChild(boneOffset);
}
if (attachNode->getName().find("Left") != std::string::npos)
{
if (!trans)
trans = new osg::PositionAttitudeTransform;
trans->setScale(osg::Vec3f(-1.f, 1.f, 1.f));
// Need to invert culling because of the negative scale
// Note: for absolute correctness we would need to check the current front face for every mesh then invert it
// However MW isn't doing this either, so don't. Assuming all meshes are using backface culling is more efficient.
static osg::ref_ptr<osg::StateSet> frontFaceStateSet;
if (!frontFaceStateSet)
{
frontFaceStateSet = new osg::StateSet;
osg::FrontFace* frontFace = new osg::FrontFace;
frontFace->setMode(osg::FrontFace::CLOCKWISE);
frontFaceStateSet->setAttributeAndModes(frontFace, osg::StateAttribute::ON);
}
trans->setStateSet(frontFaceStateSet);
}
if (trans)
{
attachNode->addChild(trans);
trans->addChild(toAttach);
return trans;
}
else
{
attachNode->addChild(toAttach);
return toAttach;
}
}
}
