Method removeEmptyNodes

components/sceneutil/optimizer.cpp:814–848

}

void Optimizer::RemoveEmptyNodesVisitor::removeEmptyNodes()
{

    NodeList newEmptyGroups;

    // keep iterator through until scene graph is cleaned of empty nodes.
    while (!_redundantNodeList.empty())
    {
        for(NodeList::iterator itr=_redundantNodeList.begin();
            itr!=_redundantNodeList.end();
            ++itr)
        {

            osg::ref_ptr<osg::Node> nodeToRemove = (*itr);

            // take a copy of parents list since subsequent removes will modify the original one.
            osg::Node::ParentList parents = nodeToRemove->getParents();

            for(osg::Node::ParentList::iterator pitr=parents.begin();
                pitr!=parents.end();
                ++pitr)
            {
                osg::Group* parent = *pitr;
                if (!parent->asSwitch() && !dynamic_cast<osg::LOD*>(parent) && !dynamic_cast<osg::Sequence*>(parent))
                {
                    parent->removeChild(nodeToRemove.get());
                    if (parent->getNumChildren()==0 && isOperationPermissibleForObject(parent)) newEmptyGroups.insert(parent);
                }
            }
        }

        _redundantNodeList.clear();
        _redundantNodeList.swap(newEmptyGroups);
    }
}


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