C++ Group::getUserData方法代码示例

void
FltExportVisitor::apply( osg::Group& node )
{
    ScopedStatePushPop guard( this, node.getStateSet() );

    if (_firstNode)
    {
        // On input, a FLT header creates a Group node.
        // On export, we always write a Header record, but then the first Node
        //   we export is the Group that was created from the original input Header.
        // On successive roundtrips, this results in increased redundant top-level Group nodes/records.
        // Avoid this by NOT outputting anything for a top-level Group node.
        _firstNode = false;
        traverse( node );
        return;
    }

    // A Group node could indicate one of many possible records.
    //   Header record -- Don't need to support this here. We always output a header.
    //   Group record -- HIGH
    //   Child of an LOD node -- HIGH Currently write out a Group record regardless.
    //   InstanceDefinition/InstanceReference -- MED --  multiparented Group is an instance
    //   Extension record -- MED
    //   Object record -- MED
    //   LightPointSystem record (if psgSim::MultiSwitch) -- LOW

    osgSim::MultiSwitch* multiSwitch = dynamic_cast<osgSim::MultiSwitch*>( &node );
    if (multiSwitch)
    {
        writeSwitch( multiSwitch );
    }

    else
    {
        osgSim::ObjectRecordData* ord =
            dynamic_cast< osgSim::ObjectRecordData* >( node.getUserData() );
        if (ord)
        {
            // This Group should write an Object Record.
            writeObject( node, ord );
        }
        else
        {
            // Handle other cases here.
            // For now, just output a Group record.
            writeGroup( node );
        }
    }

    writeMatrix( node.getUserData() );
    writeComment( node );
    writePushTraverseWritePop( node );
}

void TileMapper::apply(osg::Group& node)
{
    if (node.getName()=="TileContent") 
    {
        _containsGeode = true;
        return;
    }

    if (isCulled(node))
        return;

    // push the culling mode.
    pushCurrentMask();

    TileIdentifier* tid = dynamic_cast<TileIdentifier*>(node.getUserData());
    
    if (tid)
    {
        _containsGeode = false;
    }

    traverse(node);

    if (tid)
    {
        if (_containsGeode)
        {
            insertTile(*tid);

            _containsGeode = false;

        }
    
    }

    // pop the culling mode.
    popCurrentMask();
}

void TileMapper::apply(osg::Group& node)
{
    if (node.getName()=="TileContent") 
    {
        _containsGeode = true;
        return;
    }

    if (isCulled(node))
	return;

    // push the culling mode.
    pushCurrentMask();

    TileIdentifier* tid = dynamic_cast<TileIdentifier*>(node.getUserData());
    
    if (tid)
    {
        _tileStack.push_back(TileStack::value_type(*tid,&node));

        _containsGeode = false;
    }

    traverse(node);

    if (tid)
    {
        if (_containsGeode)
        {
            insertTile(*tid);

            _containsGeode = false;

#if 0
            std::cout<<"found Group="<<tid->lod
		     <<"  X="<<tid->x
		     <<"  Y="<<tid->y
		     <<"  ptr="<<&node<<std::endl;  

            std::cout<<"      inheritance list "<<_tileStack.size()<<std::endl;
            for(TileStack::iterator itr=_tileStack.begin();
                itr!=_tileStack.end();
                ++itr)
            {
                std::cout<<"      LOD="<<itr->first.lod
                         <<" X="<<itr->first.x
                         <<" Y="<<itr->first.y
                         <<" className="<<itr->second->className()
                         <<" ptr="<<itr->second<<std::endl;      
            }

            
            osg::StateSet* stateset = node.getOrCreateStateSet();
            osg::Material* material = new osg::Material;
            material->setColorMode(osg::Material::OFF);
            stateset->setAttribute(material);
            
            switch(tid->lod)
            {
            case(0): material->setEmission(osg::Material::FRONT_AND_BACK,osg::Vec4(1.0f,1.0f,1.0f,1.0f)); break;
            case(1): material->setEmission(osg::Material::FRONT_AND_BACK,osg::Vec4(1.0f,0.0f,0.0f,1.0f)); break;
            case(2): material->setEmission(osg::Material::FRONT_AND_BACK,osg::Vec4(0.0f,1.0f,0.0f,1.0f)); break;
            case(3): material->setEmission(osg::Material::FRONT_AND_BACK,osg::Vec4(0.0f,0.0f,1.0f,1.0f)); break;
            case(4): material->setEmission(osg::Material::FRONT_AND_BACK,osg::Vec4(1.0f,0.0f,1.0f,1.0f)); break;
            }
            
#endif            

        }
    
        _tileStack.pop_back();
    }

    // pop the culling mode.
    popCurrentMask();
}