root/OpenSceneGraph/trunk/examples/osgsimulation/osgsimulation.cpp @ 13237

Revision 12529, 17.3 kB (checked in by robert, 4 years ago)

Replaced .osg with .osgt file usage

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1/* OpenSceneGraph example, osgsimulation.
2*
3*  Permission is hereby granted, free of charge, to any person obtaining a copy
4*  of this software and associated documentation files (the "Software"), to deal
5*  in the Software without restriction, including without limitation the rights
6*  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7*  copies of the Software, and to permit persons to whom the Software is
8*  furnished to do so, subject to the following conditions:
9*
10*  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
11*  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
12*  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
13*  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
14*  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
15*  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
16*  THE SOFTWARE.
17*/
18
19#ifdef WIN32
20/////////////////////////////////////////////////////////////////////////////
21// Disable unavoidable warning messages:
22
23//  4103: used #pragma pack to change alignment
24//  4114: same type qualifier used more than once
25//  4201: nonstandard extension used : nameless struct/union
26//  4237: "keyword" reserved for future use
27//  4251: class needs to have dll-interface to export class
28//  4275: non DLL-interface class used as base for DLL-interface class
29//  4290: C++ Exception Specification ignored
30//  4503: decorated name length exceeded, name was truncated
31//  4786: string too long - truncated to 255 characters
32
33#pragma warning(disable : 4103 4114 4201 4237 4251 4275 4290 4503 4335 4786)
34
35#endif // WIN32
36
37#include <osgViewer/Viewer>
38#include <osgViewer/ViewerEventHandlers>
39
40#include <osg/Group>
41#include <osg/Geode>
42#include <osg/ShapeDrawable>
43#include <osg/Texture2D>
44#include <osg/PositionAttitudeTransform>
45#include <osg/MatrixTransform>
46#include <osg/CoordinateSystemNode>
47
48#include <osgDB/FileUtils>
49#include <osgDB/fstream>
50#include <osgDB/ReadFile>
51
52#include <osgText/Text>
53
54#include <osg/CoordinateSystemNode>
55
56#include <osgSim/OverlayNode>
57#include <osgSim/SphereSegment>
58
59#include <osgGA/NodeTrackerManipulator>
60#include <osgGA/StateSetManipulator>
61#include <osgGA/TrackballManipulator>
62#include <osgGA/FlightManipulator>
63#include <osgGA/DriveManipulator>
64#include <osgGA/KeySwitchMatrixManipulator>
65#include <osgGA/AnimationPathManipulator>
66#include <osgGA/TerrainManipulator>
67
68#include <osgParticle/FireEffect>
69
70#include <iostream>
71
72osg::Node* createEarth()
73{
74    osg::TessellationHints* hints = new osg::TessellationHints;
75    hints->setDetailRatio(5.0f);
76
77   
78    osg::ShapeDrawable* sd = new osg::ShapeDrawable(new osg::Sphere(osg::Vec3(0.0,0.0,0.0), osg::WGS_84_RADIUS_POLAR), hints);
79   
80    osg::Geode* geode = new osg::Geode;
81    geode->addDrawable(sd);
82   
83    std::string filename = osgDB::findDataFile("Images/land_shallow_topo_2048.jpg");
84    geode->getOrCreateStateSet()->setTextureAttributeAndModes(0, new osg::Texture2D(osgDB::readImageFile(filename)));
85   
86    osg::CoordinateSystemNode* csn = new osg::CoordinateSystemNode;
87    csn->setEllipsoidModel(new osg::EllipsoidModel());
88    csn->addChild(geode);
89   
90    return csn;
91   
92}
93
94
95class ModelPositionCallback : public osg::NodeCallback
96{
97public:
98
99    ModelPositionCallback(double speed):
100        _latitude(0.0),
101        _longitude(0.0),
102        _height(100000.0),
103        _speed(speed)
104    {
105        _rotation.makeRotate(osg::DegreesToRadians(90.0),0.0,0.0,1.0);
106    }
107   
108    void updateParameters()
109    {
110        _longitude += _speed * ((2.0*osg::PI)/360.0)/20.0;
111    }
112
113
114    virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
115    {
116        updateParameters();
117       
118        osg::NodePath nodePath = nv->getNodePath();
119
120        osg::MatrixTransform* mt = nodePath.empty() ? 0 : dynamic_cast<osg::MatrixTransform*>(nodePath.back());
121        if (mt)
122        {
123            osg::CoordinateSystemNode* csn = 0;
124
125            // find coordinate system node from our parental chain
126            unsigned int i;
127            for(i=0; i<nodePath.size() && csn==0; ++i)
128            {
129                csn = dynamic_cast<osg::CoordinateSystemNode*>(nodePath[i]);
130            }
131           
132            if (csn)
133            {
134
135
136                osg::EllipsoidModel* ellipsoid = csn->getEllipsoidModel();
137                if (ellipsoid)
138                {
139                    osg::Matrix inheritedMatrix;
140                    for(i+=1; i<nodePath.size()-1; ++i)
141                    {
142                        osg::Transform* transform = nodePath[i]->asTransform();
143                        if (transform) transform->computeLocalToWorldMatrix(inheritedMatrix, nv);
144                    }
145                   
146                    osg::Matrixd matrix(inheritedMatrix);
147
148                    //osg::Matrixd matrix;
149                    ellipsoid->computeLocalToWorldTransformFromLatLongHeight(_latitude,_longitude,_height,matrix);
150                    matrix.preMultRotate(_rotation);
151                   
152                    mt->setMatrix(matrix);
153                }
154
155            }       
156        }
157           
158        traverse(node,nv);
159    }   
160   
161    double                  _latitude;
162    double                  _longitude;
163    double                  _height;
164    osg::Quat               _rotation;
165    double                  _speed;
166};
167
168
169class FindNamedNodeVisitor : public osg::NodeVisitor
170{
171public:
172    FindNamedNodeVisitor(const std::string& name):
173        osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN),
174        _name(name) {}
175   
176    virtual void apply(osg::Node& node)
177    {
178        if (node.getName()==_name)
179        {
180            _foundNodes.push_back(&node);
181        }
182        traverse(node);
183    }
184   
185    typedef std::vector< osg::ref_ptr<osg::Node> > NodeList;
186
187    std::string _name;
188    NodeList _foundNodes;
189};
190
191
192int main(int argc, char **argv)
193{
194    // use an ArgumentParser object to manage the program arguments.
195    osg::ArgumentParser arguments(&argc,argv);
196   
197    // set up the usage document, in case we need to print out how to use this program.
198    arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the example which demonstrates use of node tracker.");
199    arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName());
200    arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
201   
202
203    // construct the viewer.
204    osgViewer::Viewer viewer(arguments);
205
206    // add the state manipulator
207    viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );
208   
209    // add the thread model handler
210    viewer.addEventHandler(new osgViewer::ThreadingHandler);
211
212    // add the window size toggle handler
213    viewer.addEventHandler(new osgViewer::WindowSizeHandler);
214       
215    // add the stats handler
216    viewer.addEventHandler(new osgViewer::StatsHandler);
217       
218    // add the record camera path  handler
219    viewer.addEventHandler(new osgViewer::RecordCameraPathHandler);
220
221    // add the help handler
222    viewer.addEventHandler(new osgViewer::HelpHandler(arguments.getApplicationUsage()));
223
224    // set the near far ration computation up.
225    viewer.getCamera()->setComputeNearFarMode(osg::CullSettings::COMPUTE_NEAR_FAR_USING_PRIMITIVES);
226    viewer.getCamera()->setNearFarRatio(0.000003f);
227
228
229    double speed = 1.0;
230    while (arguments.read("-f") || arguments.read("--fixed")) speed = 0.0;
231
232
233    osg::Quat rotation;
234    osg::Vec4 vec4;
235    while (arguments.read("--rotate-model",vec4[0],vec4[1],vec4[2],vec4[3]))
236    {
237        osg::Quat local_rotate;
238        local_rotate.makeRotate(osg::DegreesToRadians(vec4[0]),vec4[1],vec4[2],vec4[3]);
239       
240        rotation = rotation * local_rotate;
241    }
242
243    osg::NodeCallback* nc = 0;
244    std::string flightpath_filename;
245    while (arguments.read("--flight-path",flightpath_filename))
246    {
247        osgDB::ifstream fin(flightpath_filename.c_str());
248        if (fin)
249        {
250            osg::AnimationPath* path = new osg::AnimationPath;
251            path->read(fin);
252            nc = new osg::AnimationPathCallback(path);
253        }
254    }
255   
256    osgGA::NodeTrackerManipulator::TrackerMode trackerMode = osgGA::NodeTrackerManipulator::NODE_CENTER_AND_ROTATION;
257    std::string mode;
258    while (arguments.read("--tracker-mode",mode))
259    {
260        if (mode=="NODE_CENTER_AND_ROTATION") trackerMode = osgGA::NodeTrackerManipulator::NODE_CENTER_AND_ROTATION;
261        else if (mode=="NODE_CENTER_AND_AZIM") trackerMode = osgGA::NodeTrackerManipulator::NODE_CENTER_AND_AZIM;
262        else if (mode=="NODE_CENTER") trackerMode = osgGA::NodeTrackerManipulator::NODE_CENTER;
263        else
264        {
265            std::cout<<"Unrecognized --tracker-mode option "<<mode<<", valid options are:"<<std::endl;
266            std::cout<<"    NODE_CENTER_AND_ROTATION"<<std::endl;
267            std::cout<<"    NODE_CENTER_AND_AZIM"<<std::endl;
268            std::cout<<"    NODE_CENTER"<<std::endl;
269            return 1;
270        }
271    }
272   
273   
274    osgGA::NodeTrackerManipulator::RotationMode rotationMode = osgGA::NodeTrackerManipulator::TRACKBALL;
275    while (arguments.read("--rotation-mode",mode))
276    {
277        if (mode=="TRACKBALL") rotationMode = osgGA::NodeTrackerManipulator::TRACKBALL;
278        else if (mode=="ELEVATION_AZIM") rotationMode = osgGA::NodeTrackerManipulator::ELEVATION_AZIM;
279        else
280        {
281            std::cout<<"Unrecognized --rotation-mode option "<<mode<<", valid options are:"<<std::endl;
282            std::cout<<"    TRACKBALL"<<std::endl;
283            std::cout<<"    ELEVATION_AZIM"<<std::endl;
284            return 1;
285        }
286    }
287
288    bool useOverlay = true;
289    while (arguments.read("--no-overlay") || arguments.read("-n")) useOverlay = false;
290   
291    osgSim::OverlayNode::OverlayTechnique technique = osgSim::OverlayNode::OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY;
292    while (arguments.read("--object")) technique = osgSim::OverlayNode::OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY;
293    while (arguments.read("--ortho") || arguments.read("--orthographic")) technique = osgSim::OverlayNode::VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY;
294    while (arguments.read("--persp") || arguments.read("--perspective")) technique = osgSim::OverlayNode::VIEW_DEPENDENT_WITH_PERSPECTIVE_OVERLAY;
295
296    unsigned int overlayTextureUnit = 1;
297    while (arguments.read("--unit", overlayTextureUnit)) {}
298   
299    std::string pathfile;
300    while (arguments.read("-p",pathfile)) {}
301
302    bool addFireEffect = arguments.read("--fire");
303
304    // if user request help write it out to cout.
305    if (arguments.read("-h") || arguments.read("--help"))
306    {
307        arguments.getApplicationUsage()->write(std::cout);
308        return 1;
309    }
310   
311   
312    osg::ref_ptr<osgGA::NodeTrackerManipulator> tm;
313   
314    std::string overlayFilename;
315    while(arguments.read("--overlay", overlayFilename)) {}
316
317    // read the scene from the list of file specified commandline args.
318    osg::ref_ptr<osg::Node> root = osgDB::readNodeFiles(arguments);
319
320    if (!root) root = createEarth();
321
322    if (!root) return 0;
323
324
325    if (!overlayFilename.empty())
326    {
327        //osg::Object *pObj = osgDB::readObjectFile("alaska_clean.shp");
328        //osg::ref_ptr<osg::Geode> shapefile = dynamic_cast<osg::Geode*> (pObj);
329        //
330        //ConvertLatLon2EllipsoidCoordinates latlon2em;
331        //shapefile->accept(latlon2em);
332
333        osg::ref_ptr<osg::Node> shapefile = osgDB::readNodeFile(overlayFilename);
334       
335        if (!shapefile)
336        {
337            osg::notify(osg::NOTICE)<<"File `"<<overlayFilename<<"` not found"<<std::endl;
338            return 1;
339        }
340
341        osg::CoordinateSystemNode* csn = dynamic_cast<osg::CoordinateSystemNode*>(root.get());
342        if (csn)
343        {
344
345            osgSim::OverlayNode* overlayNode = new osgSim::OverlayNode(technique);
346            overlayNode->getOrCreateStateSet()->setTextureAttribute(1, new osg::TexEnv(osg::TexEnv::DECAL));
347            overlayNode->setOverlaySubgraph(shapefile.get());
348            overlayNode->setOverlayTextureSizeHint(1024);
349            overlayNode->setOverlayTextureUnit(overlayTextureUnit);
350
351            // insert the OverlayNode between the coordinate system node and its children.
352            for(unsigned int i=0; i<csn->getNumChildren(); ++i)
353            {
354                overlayNode->addChild( csn->getChild(i) );
355            }
356
357            csn->removeChildren(0, csn->getNumChildren());
358            csn->addChild(overlayNode);
359
360            viewer.setSceneData(csn);
361        }
362        else
363        {
364            osgSim::OverlayNode* overlayNode = new osgSim::OverlayNode(technique);
365            overlayNode->getOrCreateStateSet()->setTextureAttribute(1, new osg::TexEnv(osg::TexEnv::DECAL));
366            overlayNode->setOverlaySubgraph(shapefile.get());
367            overlayNode->setOverlayTextureSizeHint(1024);
368            overlayNode->addChild(root.get());
369
370            viewer.setSceneData(overlayNode);
371        }
372    }
373    else
374    {
375   
376
377        // add a viewport to the viewer and attach the scene graph.
378        viewer.setSceneData(root.get());
379
380        osg::CoordinateSystemNode* csn = dynamic_cast<osg::CoordinateSystemNode*>(root.get());
381        if (csn)
382        {
383
384            osg::ref_ptr<osgSim::OverlayNode> overlayNode;
385            if (useOverlay)
386            {
387                overlayNode = new osgSim::OverlayNode(technique);
388
389                // insert the OverlayNode between the coordinate system node and its children.
390                for(unsigned int i=0; i<csn->getNumChildren(); ++i)
391                {
392                    overlayNode->addChild( csn->getChild(i) );
393                }
394
395                csn->removeChildren(0, csn->getNumChildren());
396                csn->addChild(overlayNode.get());
397
398                // tell the overlay node to continously update its overlay texture
399                // as we know we'll be tracking a moving target.
400                overlayNode->setContinuousUpdate(true);
401            }
402
403
404            osg::Node* cessna = osgDB::readNodeFile("cessna.osgt");
405            if (cessna)
406            {
407                double s = 200000.0 / cessna->getBound().radius();
408
409                osg::MatrixTransform* scaler = new osg::MatrixTransform;
410                scaler->addChild(cessna);
411                scaler->setMatrix(osg::Matrixd::scale(s,s,s)*osg::Matrixd::rotate(rotation));
412                scaler->getOrCreateStateSet()->setMode(GL_RESCALE_NORMAL,osg::StateAttribute::ON);
413               
414                if (addFireEffect)
415                {               
416                    osg::Vec3d center = cessna->getBound().center();
417                   
418                    osgParticle::FireEffect* fire = new osgParticle::FireEffect(center, 10.0f);
419                    scaler->addChild(fire);
420                }
421               
422
423                if (false)
424                {
425                    osgSim::SphereSegment* ss = new osgSim::SphereSegment(
426                                        osg::Vec3(0.0f,0.0f,0.0f), // center
427                                        19.9f, // radius
428                                        osg::DegreesToRadians(135.0f),
429                                        osg::DegreesToRadians(240.0f),
430                                        osg::DegreesToRadians(-10.0f),
431                                        osg::DegreesToRadians(30.0f),
432                                        60);
433
434                    scaler->addChild(ss);
435                }
436
437                osg::MatrixTransform* mt = new osg::MatrixTransform;
438                mt->addChild(scaler);
439
440
441                if (!nc) nc = new ModelPositionCallback(speed);
442
443                mt->setUpdateCallback(nc);
444
445                csn->addChild(mt);
446
447                // if we are using an overaly node, use the cessna subgraph as the overlay subgraph
448                if (overlayNode.valid())
449                {
450                    overlayNode->setOverlaySubgraph(mt);
451                }
452
453                tm = new osgGA::NodeTrackerManipulator;
454                tm->setTrackerMode(trackerMode);
455                tm->setRotationMode(rotationMode);
456                tm->setTrackNode(scaler);
457            }
458            else
459            {
460                 std::cout<<"Failed to read cessna.osgt"<<std::endl;
461            }
462
463        }   
464    }
465
466    // set up camera manipulators.
467    {
468        osg::ref_ptr<osgGA::KeySwitchMatrixManipulator> keyswitchManipulator = new osgGA::KeySwitchMatrixManipulator;
469
470        if (tm.valid()) keyswitchManipulator->addMatrixManipulator( '0', "NodeTracker", tm.get() );
471
472        keyswitchManipulator->addMatrixManipulator( '1', "Trackball", new osgGA::TrackballManipulator() );
473        keyswitchManipulator->addMatrixManipulator( '2', "Flight", new osgGA::FlightManipulator() );
474        keyswitchManipulator->addMatrixManipulator( '3', "Drive", new osgGA::DriveManipulator() );
475        keyswitchManipulator->addMatrixManipulator( '4', "Terrain", new osgGA::TerrainManipulator() );
476
477        if (!pathfile.empty())
478        {
479            osgGA::AnimationPathManipulator* apm = new osgGA::AnimationPathManipulator(pathfile);
480            if (apm || !apm->valid())
481            {
482                unsigned int num = keyswitchManipulator->getNumMatrixManipulators();
483                keyswitchManipulator->addMatrixManipulator( '5', "Path", apm );
484                keyswitchManipulator->selectMatrixManipulator(num);
485            }
486        }
487
488        viewer.setCameraManipulator( keyswitchManipulator.get() );
489    }
490
491    // viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);
492
493    return viewer.run();
494}
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