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justhomework/OpenGL/lab4/main.cpp

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#include <osgViewer/Viewer>
#include <osgDB/ReadFile>
#include <osgText/Text>
#include <osgGA/TrackballManipulator>
#include <chrono>
#include <osgGA/GUIEventAdapter>
#include <osgViewer/ViewerEventHandlers>
using namespace std;
using namespace chrono;
auto lastFT = system_clock::now();
auto FT = system_clock::now();
int main(int argc, char** argv)
{
// 创建一个OSG Viewer对象
osgViewer::Viewer viewer;
viewer.setUpViewInWindow(50, 50, 800, 600);
viewer.getCamera()->setClearColor(osg::Vec4(0.2, 0.2, 0.2, 1.0));
viewer.setCameraManipulator(new osgGA::TrackballManipulator);
viewer.addEventHandler(new osgViewer::StatsHandler);//查看帧数 s
// 创建一个OSG Node对象并加载OSG模型
osg::ref_ptr<osg::Node> model = osgDB::readNodeFile("clock.osgt");
// 将Node对象添加到OSG Viewer中
viewer.setSceneData(model);
// 启动OSG Viewer循环
while (!viewer.done())
{
auto thisFT = system_clock::now();
auto FT = duration_cast<microseconds>(thisFT - lastFT);
lastFT = thisFT;
viewer.frame();
}
return 0;
}