第1课时《Qt osgEarth 编程入门》

1.首先编译osg /osgEarth 源码，配置环境变量，将osg及osgEarth 对应的bin目录加入系统环境中。

2.在QT中的pro文件中进行引用：

include(deployment.pri)

win32:INCLUDEPATH +=C:/OSGEARRH/include \

              C:/OpenSceneGraph/include \

win32:DEPENDPATH +=C:/OSGEARRH/include \

             C:/OpenSceneGraph/include

win32:CONFIG(release, debug|release): LIBS += \

                                            -LC:/OSGEARRH/lib/ -losgEarth \

                                            -LC:/OSGEARRH/lib/ -losgEarthAnnotation \

                                            -LC:/OSGEARRH/lib/ -losgEarthFeatures \

                                            -LC:/OSGEARRH/lib/ -losgEarthQt \

                                            -LC:/OSGEARRH/lib/ -losgEarthSymbology \

                                            -LC:/OSGEARRH/lib/ -losgEarthUtil \

3.在CPP文件编写

     一般我们加载和使用对应的地理信息资源需要以下几步：

源码如下：

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

#include 

int main( int argc, char** argv )

{

    QApplication app(argc, argv);

    osgQt::initQtWindowingSystem();

    //osg::Group* sceneroot = new osg::Group;

    osg::ref_ptr<osgEarth::Map> map=  new osgEarth::Map;

    osg::ref_ptr<osgEarth::MapNode> mapNode= new osgEarth::MapNode(map);

    osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer;

    osgEarth::Drivers::TMSOptions tms;

    tms.url()="D:/data/world/tms.xml";

    map->addImageLayer(new osgEarth::ImageLayer("My",tms));

    viewer->addEventHandler(new osgViewer::StatsHandler);

    viewer->addEventHandler(new osgGA::StateSetManipulator());

    viewer->setCameraManipulator( new osgGA::TrackballManipulator );

    viewer->setSceneData(mapNode);

    osgQt::setViewer( viewer.get() );

    osgQt::GLWidget* glw = new osgQt::GLWidget;

    osgQt::GraphicsWindowQt* graphicswin = new osgQt::GraphicsWindowQt(glw);

    viewer->getCamera()->setViewport( new osg::Viewport(0, 0, glw->width(), glw->height() ) );

    viewer->getCamera()->setGraphicsContext( graphicswin );

    glw->show();

    return app.exec();

}

运行结果如下：