| 167 | | // use an ArgumentParser object to manage the program arguments. |
| 168 | | osg::ArgumentParser arguments(&argc,argv); |
| 169 | | |
| 170 | | // set up the usage document, in case we need to print out how to use this program. |
| 171 | | arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" is the example which demonstrates use billboard nodes."); |
| 172 | | arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ..."); |
| 173 | | arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information"); |
| 174 | | |
| 175 | | // initialize the viewer. |
| 176 | | osgProducer::Viewer viewer(arguments); |
| 177 | | |
| 178 | | // set up the value with sensible default event handlers. |
| 179 | | viewer.setUpViewer(osgProducer::Viewer::STANDARD_SETTINGS); |
| 180 | | |
| 181 | | // get details on keyboard and mouse bindings used by the viewer. |
| 182 | | viewer.getUsage(*arguments.getApplicationUsage()); |
| 183 | | |
| 184 | | // if user request help write it out to cout. |
| 185 | | if (arguments.read("-h") || arguments.read("--help")) |
| 186 | | { |
| 187 | | arguments.getApplicationUsage()->write(std::cout); |
| 188 | | return 1; |
| 189 | | } |
| 190 | | |
| 191 | | // any option left unread are converted into errors to write out later. |
| 192 | | arguments.reportRemainingOptionsAsUnrecognized(); |
| 193 | | |
| 194 | | // report any errors if they have occured when parsing the program aguments. |
| 195 | | if (arguments.errors()) |
| 196 | | { |
| 197 | | arguments.writeErrorMessages(std::cout); |
| 198 | | return 1; |
| 199 | | } |
| 200 | | |
| 201 | | // create a model from the images. |
| 202 | | osg::Node* rootNode = createModel(); |
| 203 | | |
| 204 | | // set the scene to render |
| 205 | | viewer.setSceneData(rootNode); |
| 206 | | |
| 207 | | // create the windows and run the threads. |
| 208 | | viewer.realize(); |
| 209 | | |
| 210 | | while( !viewer.done() ) |
| 211 | | { |
| 212 | | // wait for all cull and draw threads to complete. |
| 213 | | viewer.sync(); |
| 214 | | |
| 215 | | // update the scene by traversing it with the the update visitor which will |
| 216 | | // call all node update callbacks and animations. |
| 217 | | viewer.update(); |
| 218 | | |
| 219 | | // fire off the cull and draw traversals of the scene. |
| 220 | | viewer.frame(); |
| 221 | | |
| 222 | | } |
| 223 | | |
| 224 | | // wait for all cull and draw threads to complete. |
| 225 | | viewer.sync(); |
| 226 | | |
| 227 | | // run a clean up frame to delete all OpenGL objects. |
| 228 | | viewer.cleanup_frame(); |
| 229 | | |
| 230 | | // wait for all the clean up frame to complete. |
| 231 | | viewer.sync(); |
| 232 | | |
| 233 | | return 0; |
| | 171 | // run the viewers frame loop |
| | 172 | return viewer.run(); |
