#include <osgViewer/Viewer>
#include <osgViewer/ViewerEventHandlers>
#include <osgGA/StateSetManipulator>
#include <osgGA/TrackballManipulator>
#include <osgEarth/Map>
#include <osgEarth/MapNode>
#include <osgEarthDrivers/tms/TMSOptions>
#include <osgEarthDrivers/model_feature_geom/FeatureGeomModelOptions>
#include <osgEarthDrivers/feature_ogr/OGRFeatureOptions>
#include <osgEarthDrivers/cache_filesystem/FileSystemCache>
#include <osgEarthUtil/EarthManipulator>
#include <osgEarthUtil/GeodeticGraticule>
#include <osgEarthUtil/LatLongFormatter>
#include <osgEarthUtil/Controls>
#include <osgEarthUtil/MouseCoordsTool>
#include <osgEarthUtil/AutoClipPlaneHandler>
#include <osg/PositionAttitudeTransform>
#include <osg/Group>
#include <osg/Node>
#include <osgDB/ReadFile>
//初始化影像、地形
void initImageAndElevation(osgEarth::Map* map)
{
//影像
osgEarth::Drivers::TMSOptions imgOption;
imgOption.url()="D:/CacheData/OUTDATA/JiLinImage/tms.xml";
//imgOption.url()="http://readymap.org/readymap/tiles/1.0.0/7/";
map->addImageLayer( new osgEarth::ImageLayer( "image", imgOption ) );
//高程
osgEarth::Drivers::TMSOptions elvOption;
elvOption.url()="D:/CacheData/OUTDATA/JiLinElevation/tms.xml";
//elvOption.url()="http://readymap.org/readymap/tiles/1.0.0/9/";
map->addElevationLayer( new osgEarth::ElevationLayer( "elevation", elvOption ) );
}
//初始化省界国界
void initBoundaries(osgEarth::Map* map)
{
osgEarth::Drivers::FeatureGeomModelOptions worldBoundaries;
osgEarth::Drivers::OGRFeatureOptions ogrOptions;
ogrOptions.url()="world.shp";
worldBoundaries.compilerOptions()=ogrOptions;
//worldBoundaries.styles().
map->addModelLayer(new osgEarth::ModelLayer("world", worldBoundaries));
}
//初始化事件处理器
void initEventHandler(osgViewer::Viewer* viewer,osgEarth::MapNode* mapNode)
{
//鼠标位置信息显示
osgEarth::Util::Formatter* formatter = new osgEarth::Util::LatLongFormatter();
osgEarth::Util::LabelControl* readout = new osgEarth::Util::LabelControl();
osgEarth::Util::ControlCanvas::get( viewer, true )->addControl( readout );
osgEarth::Util::MouseCoordsTool* tool = new osgEarth::Util::MouseCoordsTool( mapNode );
tool->addCallback( new osgEarth::Util::MouseCoordsLabelCallback(readout, formatter) );
viewer->addEventHandler( tool );
// add the state manipulator
viewer->addEventHandler( new osgGA::StateSetManipulator(viewer->getCamera()->getOrCreateStateSet()) );
// add the thread model handler
viewer->addEventHandler(new osgViewer::ThreadingHandler);
// add the window size toggle handler
viewer->addEventHandler(new osgViewer::WindowSizeHandler);
// add the stats handler
viewer->addEventHandler(new osgViewer::StatsHandler);
// add the record camera path handler
viewer->addEventHandler(new osgViewer::RecordCameraPathHandler);
// add the LOD Scale handler
viewer->addEventHandler(new osgViewer::LODScaleHandler);
// add the screen capture handler
viewer->addEventHandler(new osgViewer::ScreenCaptureHandler);
}
//初始化操纵器
void initManipulator(osgViewer::Viewer* viewer,osgEarth::Map* map)
{
//操纵器
osgEarth::Util::EarthManipulator* em=new osgEarth::Util::EarthManipulator();
//赤道半径
double equatorRadius=map->getSRS()->getEllipsoid()->getRadiusEquator();//6378137.0
//初始视点正对中国北京
em->setHomeViewpoint(osgEarth::Util::Viewpoint(116.3,39.9,0,0,-90,equatorRadius*4));
viewer->setCameraManipulator(em);
//定位吉林
em->setViewpoint(osgEarth::Util::Viewpoint(126,43,0,0,-90,5e4), 5);//5s
}
//初始化其他杂项
void initOther(osgViewer::Viewer* viewer,osgEarth::MapNode* mapNode)
{
//反锯齿
osg::DisplaySettings::instance()->setNumMultiSamples( 4 );
//设置最大PagedLOD节点数目
//viewer->getDatabasePager()->setTargetMaximumNumberOfPageLOD(10);
//近地面自动裁剪AutoClipPlaneCullCallback
viewer->getCamera()->addCullCallback( new osgEarth::Util::AutoClipPlaneCullCallback(mapNode) );
//绘制经纬度网格
//osgEarth::Util::GeodeticGraticule* gr = new osgEarth::Util::GeodeticGraticule( mapNode );
//root->addChild(gr);
}
void main(){
osg::ref_ptr<osgViewer::Viewer> viewer = new osgViewer::Viewer;
//osgViewer::Viewer* viewer = new osgViewer::Viewer;
osg::Group* root = new osg::Group();
osg::Node* tankNode = NULL;
osg::Vec3 tankPosit;
osg::PositionAttitudeTransform* tankXform;
//缓存
osgEarth::Drivers::FileSystemCacheOptions cacheOptions;
cacheOptions.rootPath() = "./cache";
osgEarth::MapOptions mapOptions;
mapOptions.cache() = cacheOptions;
//osgEarth::Map* map = new osgEarth::Map(mapOptions);
//osgEarth::MapNode* mapNode = new osgEarth::MapNode( map );
osg::Node* configEarth = osgDB::readNodeFile("config.earth");
osgEarth::MapNode* mapNode = osgEarth::MapNode::findMapNode( configEarth );
osgEarth::Map* map = mapNode->getMap();
//关闭光照
mapNode->getOrCreateStateSet()->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
viewer->setSceneData( root );
root->addChild(mapNode);
//读取模型
tankNode = osgDB::readNodeFile("Models/t72-tank/t72-tank_des.flt");
tankXform = new osg::PositionAttitudeTransform();
root->addChild(tankXform);
tankXform->addChild(tankNode);
tankPosit.set(5,0,0);
tankXform->setPosition( tankPosit );
viewer->setCameraManipulator(new osgGA::TrackballManipulator());
//地形影像
//initImageAndElevation(map);
//矢量
//initBoundaries(map);
//操纵器
initManipulator(viewer, map);
//事件处理（键盘鼠标）
initEventHandler(viewer, mapNode);
//其他
initOther(viewer, mapNode);
viewer->realize();
while( !viewer->done() )
{
viewer->frame();
}
}