osg替代节点示例osgSim::Impostor

#include <osgViewer/Viewer>
#include <osg/Node>
#include <osg/Geometry>
#include <osg/Geode>
#include <osg/Group>
#include <osg/AutoTransform>

#include <osgDB/ReadFile>
#include <osgDB/WriteFile>

#include <osgText/Text>

#include <osgUtil/Optimizer>
#include <osgSim/Impostor>

#include <iostream>

int main()
{
    osg::ref_ptr<osgViewer::Viewer> viewer=new osgViewer::Viewer;
    osg::ref_ptr<osg::Group> root=new osg::Group;

    osg::ref_ptr<osg::Node> node=osgDB::readNodeFile("D:\\my work\\aerolite\\aerolite-0.10\\bin\\cow.osg");

    osg::ref_ptr<osgSim::Impostor> impostor=new osgSim::Impostor;
    //设置50.0f之后开始使用贴图
    impostor->setImpostorThreshold(50.0f);
    //设置模型的显示范围在0-10000内
    impostor->addChild(node.get(),0,100.0f);


    
    root->addChild(impostor.get());

    viewer->setSceneData(root.get());

    viewer->realize();

    viewer->run();
}