root/OpenSceneGraph/trunk/examples/osgsimulation/osgsimulation.cpp @ 8087

Revision 8087, 17.3 kB (checked in by robert, 7 years ago)

Added --unit entry for controlling which texture unit the overlay works on.

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