osg demo25 把fountain的底座隐藏，然后输出不带底座的文件free.osg

//DEMO25//功能：输出结点到文件，把fountain的底座隐藏，然后输出不带底座的文件free.osg#include <osgDB/ReadFile>#include <osgDB/Registry>#include <osgDB/ReaderWriter>#include <osgDB/WriteFile>#include <osg/Node>#include <osgViewer/Viewer>int main(){osgViewer::Viewer viewer;//读取模型osg::Node* node = osgDB::readNodeFile("fountain.osg");//隐藏结点node->asGroup()->getChild(0)->setNodeMask(0);viewer.setSceneData(node);//输出结点到free.osg中osgDB::writeNodeFile(*(viewer.getSceneData()),"free.osg",osgDB::Registry::instance()->getOptions());return 0;}