I'm trying to build a nice MVC app with OSG. I'm getting a seg-fault whenever
the app exits. I realize that this is due to the
AppController->osgViewer::Viewer->AppController reference loop (see line with
XXXX in the runLoop() method). The question is whether there is a "reasonable"
way to have the AppController be the event handler for the viewer?
Lee
#include <iostream>
#include <osg/ArgumentParser>
#include <osgDB/ReadFile>
#include <osgGA/GUIEventHandler>
#include <osgGA/TrackballManipulator>
#include <osgViewer/Viewer>
class AppController : public osgGA::GUIEventHandler
{
public:
AppController(int &argc, char *argv[])
{
osg::ArgumentParser arguments(&argc, argv);
_viewer = new osgViewer::Viewer(arguments);
_loadedModel = osgDB::readNodeFiles(arguments);
_rootnode = new osg::Group;
_rootnode->setName("root");
_rootnode->addChild(_loadedModel);
_viewer->setSceneData( _rootnode );
}
void runLoop()
{
_viewer->addEventHandler(this); // XXXX This is BAD
osg::ref_ptr<osgGA::TrackballManipulator> tb = new osgGA::TrackballManipulator();
_viewer->setCameraManipulator(tb);
_viewer->setReleaseContextAtEndOfFrameHint(false);
std::cerr << "start draw" << std::endl;
_viewer->run();
}
bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa)
{
if (ea.getEventType() == osgGA::GUIEventAdapter::KEYDOWN && ea.getKey() == 'h') {
std::cerr << "Hello!" << std::endl;
return true;
}
return false;
}
private:
osg::ref_ptr <osgViewer::Viewer> _viewer;
osg::ref_ptr<osg::Node> _loadedModel;
osg::ref_ptr<osg::Group> _rootnode;
};
int main(int argc, char *argv[])
{
osg::ref_ptr<AppController> app = new AppController(argc, argv);
app->runLoop();
return 0;
}
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