363 lines
12 KiB
C++
363 lines
12 KiB
C++
#ifdef WIN32
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/////////////////////////////////////////////////////////////////////////////
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// Disable unavoidable warning messages:
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// 4103: used #pragma pack to change alignment
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// 4114: same type qualifier used more than once
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// 4201: nonstandard extension used : nameless struct/union
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// 4237: "keyword" reserved for future use
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// 4251: class needs to have dll-interface to export class
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// 4275: non DLL-interface class used as base for DLL-interface class
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// 4290: C++ Exception Specification ignored
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// 4503: decorated name length exceeded, name was truncated
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// 4786: string too long - truncated to 255 characters
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#pragma warning(disable : 4103 4114 4201 4237 4251 4275 4290 4503 4335 4786)
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#endif // WIN32
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#include <osgViewer/Viewer>
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#include <osgViewer/StatsHandler>
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#include <osgViewer/HelpHandler>
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#include <osgViewer/ViewerEventHandlers>
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#include <osg/Group>
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#include <osg/Geode>
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#include <osg/ShapeDrawable>
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#include <osg/Texture2D>
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#include <osg/PositionAttitudeTransform>
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#include <osg/MatrixTransform>
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#include <osg/CoordinateSystemNode>
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#include <osgDB/FileUtils>
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#include <osgDB/ReadFile>
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#include <osgText/Text>
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#include <osg/CoordinateSystemNode>
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#include <osgSim/OverlayNode>
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#include <osgSim/SphereSegment>
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#include <osgGA/NodeTrackerManipulator>
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#include <osgGA/StateSetManipulator>
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#include <iostream>
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osg::Node* createEarth()
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{
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osg::TessellationHints* hints = new osg::TessellationHints;
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hints->setDetailRatio(5.0f);
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osg::ShapeDrawable* sd = new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(0.0,0.0,0.0), osg::WGS_84_RADIUS_POLAR), hints);
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osg::Geode* geode = new osg::Geode;
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geode->addDrawable(sd);
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std::string filename = osgDB::findDataFile("Images/land_shallow_topo_2048.jpg");
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geode->getOrCreateStateSet()->setTextureAttributeAndModes(0, new osg::Texture2D(osgDB::readImageFile(filename)));
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osg::CoordinateSystemNode* csn = new osg::CoordinateSystemNode;
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csn->setEllipsoidModel(new osg::EllipsoidModel());
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csn->addChild(geode);
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return csn;
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}
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class ModelPositionCallback : public osg::NodeCallback
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{
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public:
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ModelPositionCallback():
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_latitude(0.0),
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_longitude(0.0),
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_height(100000.0)
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{
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_rotation.makeRotate(osg::DegreesToRadians(90.0),0.0,0.0,1.0);
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}
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void updateParameters()
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{
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_longitude += ((2.0*osg::PI)/360.0)/20.0;
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}
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virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
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{
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updateParameters();
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osg::NodePath nodePath = nv->getNodePath();
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osg::MatrixTransform* mt = nodePath.empty() ? 0 : dynamic_cast<osg::MatrixTransform*>(nodePath.back());
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if (mt)
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{
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osg::CoordinateSystemNode* csn = 0;
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// find coordinate system node from our parental chain
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unsigned int i;
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for(i=0; i<nodePath.size() && csn==0; ++i)
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{
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csn = dynamic_cast<osg::CoordinateSystemNode*>(nodePath[i]);
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}
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if (csn)
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{
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osg::EllipsoidModel* ellipsoid = csn->getEllipsoidModel();
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if (ellipsoid)
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{
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osg::Matrix inheritedMatrix;
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for(i+=1; i<nodePath.size()-1; ++i)
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{
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osg::Transform* transform = nodePath[i]->asTransform();
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if (transform) transform->computeLocalToWorldMatrix(inheritedMatrix, nv);
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}
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osg::Matrixd matrix(inheritedMatrix);
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//osg::Matrixd matrix;
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ellipsoid->computeLocalToWorldTransformFromLatLongHeight(_latitude,_longitude,_height,matrix);
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matrix.preMult(osg::Matrix::rotate(_rotation));
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mt->setMatrix(matrix);
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}
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}
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}
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traverse(node,nv);
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}
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double _latitude;
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double _longitude;
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double _height;
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osg::Quat _rotation;
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};
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class FindNamedNodeVisitor : public osg::NodeVisitor
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{
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public:
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FindNamedNodeVisitor(const std::string& name):
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osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
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_name(name) {}
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virtual void apply(osg::Node& node)
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{
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if (node.getName()==_name)
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{
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_foundNodes.push_back(&node);
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}
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traverse(node);
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}
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typedef std::vector< osg::ref_ptr<osg::Node> > NodeList;
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std::string _name;
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NodeList _foundNodes;
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};
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int main(int argc, char **argv)
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{
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// use an ArgumentParser object to manage the program arguments.
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osg::ArgumentParser arguments(&argc,argv);
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// set up the usage document, in case we need to print out how to use this program.
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arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the example which demonstrates use of node tracker.");
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arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName());
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arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
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// construct the viewer.
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osgViewer::Viewer viewer;
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// add the state manipulator
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viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );
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// add the thread model handler
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viewer.addEventHandler(new osgViewer::ThreadingHandler);
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// add the window size toggle handler
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viewer.addEventHandler(new osgViewer::WindowSizeHandler);
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// add the stats handler
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viewer.addEventHandler(new osgViewer::StatsHandler);
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// add the help handler
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viewer.addEventHandler(new osgViewer::HelpHandler(arguments.getApplicationUsage()));
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// set the near far ration computation up.
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viewer.getCamera()->setComputeNearFarMode(osg::CullSettings::COMPUTE_NEAR_FAR_USING_PRIMITIVES);
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viewer.getCamera()->setNearFarRatio(0.00001f);
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osg::Quat rotation;
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osg::Vec4 vec4;
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while (arguments.read("--rotate-model",vec4[0],vec4[1],vec4[2],vec4[3]))
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{
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osg::Quat local_rotate;
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local_rotate.makeRotate(osg::DegreesToRadians(vec4[0]),vec4[1],vec4[2],vec4[3]);
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rotation = rotation * local_rotate;
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}
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osg::NodeCallback* nc = 0;
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std::string flightpath_filename;
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while (arguments.read("--flight-path",flightpath_filename))
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{
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std::ifstream fin(flightpath_filename.c_str());
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if (fin)
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{
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osg::AnimationPath* path = new osg::AnimationPath;
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path->read(fin);
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nc = new osg::AnimationPathCallback(path);
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}
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}
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osgGA::NodeTrackerManipulator::TrackerMode trackerMode = osgGA::NodeTrackerManipulator::NODE_CENTER_AND_ROTATION;
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std::string mode;
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while (arguments.read("--tracker-mode",mode))
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{
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if (mode=="NODE_CENTER_AND_ROTATION") trackerMode = osgGA::NodeTrackerManipulator::NODE_CENTER_AND_ROTATION;
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else if (mode=="NODE_CENTER_AND_AZIM") trackerMode = osgGA::NodeTrackerManipulator::NODE_CENTER_AND_AZIM;
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else if (mode=="NODE_CENTER") trackerMode = osgGA::NodeTrackerManipulator::NODE_CENTER;
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else
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{
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std::cout<<"Unrecognized --tracker-mode option "<<mode<<", valid options are:"<<std::endl;
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std::cout<<" NODE_CENTER_AND_ROTATION"<<std::endl;
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std::cout<<" NODE_CENTER_AND_AZIM"<<std::endl;
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std::cout<<" NODE_CENTER"<<std::endl;
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return 1;
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}
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}
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osgGA::NodeTrackerManipulator::RotationMode rotationMode = osgGA::NodeTrackerManipulator::TRACKBALL;
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while (arguments.read("--rotation-mode",mode))
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{
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if (mode=="TRACKBALL") rotationMode = osgGA::NodeTrackerManipulator::TRACKBALL;
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else if (mode=="ELEVATION_AZIM") rotationMode = osgGA::NodeTrackerManipulator::ELEVATION_AZIM;
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else
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{
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std::cout<<"Unrecognized --rotation-mode option "<<mode<<", valid options are:"<<std::endl;
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std::cout<<" TRACKBALL"<<std::endl;
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std::cout<<" ELEVATION_AZIM"<<std::endl;
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return 1;
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}
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}
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// if user request help write it out to cout.
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if (arguments.read("-h") || arguments.read("--help"))
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{
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arguments.getApplicationUsage()->write(std::cout);
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return 1;
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}
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// any option left unread are converted into errors to write out later.
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arguments.reportRemainingOptionsAsUnrecognized();
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// report any errors if they have occured when parsing the program aguments.
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if (arguments.errors())
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{
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arguments.writeErrorMessages(std::cout);
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return 1;
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}
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// read the scene from the list of file specified commandline args.
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osg::ref_ptr<osg::Node> root = osgDB::readNodeFiles(arguments);
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if (!root) root = createEarth();
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if (!root) return 0;
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// add a viewport to the viewer and attach the scene graph.
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viewer.setSceneData(root.get());
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osg::CoordinateSystemNode* csn = dynamic_cast<osg::CoordinateSystemNode*>(root.get());
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if (csn)
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{
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bool insertOverlayNode = true;
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osg::ref_ptr<osgSim::OverlayNode> overlayNode;
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if (insertOverlayNode)
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{
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overlayNode = new osgSim::OverlayNode;
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// insert the OverlayNode between the coordinate system node and its children.
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for(unsigned int i=0; i<csn->getNumChildren(); ++i)
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{
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overlayNode->addChild( csn->getChild(i) );
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}
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csn->removeChildren(0, csn->getNumChildren());
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csn->addChild(overlayNode.get());
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// tell the overlay node to continously update its overlay texture
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// as we know we'll be tracking a moving target.
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overlayNode->setContinuousUpdate(true);
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}
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osg::Node* cessna = osgDB::readNodeFile("cessna.osg");
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if (cessna)
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{
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double s = 200000.0 / cessna->getBound().radius();
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osg::MatrixTransform* scaler = new osg::MatrixTransform;
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scaler->addChild(cessna);
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scaler->setMatrix(osg::Matrixd::scale(s,s,s)*osg::Matrixd::rotate(rotation));
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scaler->getOrCreateStateSet()->setMode(GL_RESCALE_NORMAL,osg::StateAttribute::ON);
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if (false)
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{
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osgSim::SphereSegment* ss = new osgSim::SphereSegment(
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osg::Vec3(0.0f,0.0f,0.0f), // center
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19.9f, // radius
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osg::DegreesToRadians(135.0f),
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osg::DegreesToRadians(240.0f),
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osg::DegreesToRadians(-10.0f),
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osg::DegreesToRadians(30.0f),
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60);
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scaler->addChild(ss);
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}
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osg::MatrixTransform* mt = new osg::MatrixTransform;
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mt->addChild(scaler);
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if (!nc) nc = new ModelPositionCallback;
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mt->setUpdateCallback(nc);
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csn->addChild(mt);
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// if we are using an overaly node, use the cessna subgraph as the overlay subgraph
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if (overlayNode.valid())
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{
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overlayNode->setOverlaySubgraph(mt);
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}
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osgGA::NodeTrackerManipulator* tm = new osgGA::NodeTrackerManipulator;
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tm->setTrackerMode(trackerMode);
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tm->setRotationMode(rotationMode);
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tm->setTrackNode(scaler);
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viewer.setCameraManipulator(tm);
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}
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else
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{
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std::cout<<"Failed to read cessna.osg"<<std::endl;
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}
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}
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return viewer.run();
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}
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