Hi,
first off all sorry if is not easy to understand me because I can´t speak
English. I'm new to these issues and I have not much experience programming :)
I'm trying to run a sample of OpenScenGraph Cookbook 3.
It only works in release mode running it from Visual C + + 2008. In debug mode
or running it from outside VC++ doesn't work. I get an exception: access
violation ... blabla in subprocess RenderThread::run.
It's strange because the other day it runs ok sometimes.
The code is:
_____________________________________________________________
/* -*-c++-*- OpenSceneGraph Cookbook
* Chapter 9 Recipe 2
* Author: Wang Rui <wangray84 at gmail dot com>
*/
#include <QtCore/QtCore>
#include <QtGui/QtGui>
#include <osgDB/ReadFile>
#include <osgGA/TrackballManipulator>
#include <osgViewer/ViewerEventHandlers>
#include <osgViewer/Viewer>
#include <osgQt/GraphicsWindowQt>
osg::Camera* createCamera( int x, int y, int w, int h )
{
osg::DisplaySettings* ds = osg::DisplaySettings::instance().get();
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new
osg::GraphicsContext::Traits;
traits->windowDecoration = false;
traits->x = x;
traits->y = y;
traits->width = w;
traits->height = h;
traits->doubleBuffer = true;
osg::ref_ptr<osg::Camera> camera = new osg::Camera;
camera->setGraphicsContext( new osgQt::GraphicsWindowQt(traits.get()) );
camera->setClearColor( osg::Vec4(0.2, 0.2, 0.6, 1.0) );
camera->setViewport( new osg::Viewport(0, 0, traits->width, traits->height)
);
camera->setProjectionMatrixAsPerspective(
30.0f,
static_cast<double>(traits->width)/static_cast<double>(traits->height), 1.0f,
10000.0f );
return camera.release();
}
class RenderThread : public QThread
{
public:
RenderThread() : QThread(), viewerPtr(0) {}
virtual ~RenderThread()
{ if (viewerPtr) viewerPtr->setDone(true); wait(); }
osgViewer::Viewer* viewerPtr;
protected:
virtual void run() { if (viewerPtr) viewerPtr->run(); }
};
class ViewerWidget : public QWidget
{
public:
ViewerWidget( osg::Camera* camera, osg::Node* scene )
: QWidget()
{
_viewer.setCamera( camera );
_viewer.setSceneData( scene );
_viewer.addEventHandler( new osgViewer::StatsHandler );
_viewer.setCameraManipulator( new osgGA::TrackballManipulator );
_viewer.setThreadingModel( osgViewer::Viewer::SingleThreaded );
osgQt::GraphicsWindowQt* gw = dynamic_cast<osgQt::GraphicsWindowQt*>(
camera->getGraphicsContext() );
if ( gw )
{
QVBoxLayout* layout = new QVBoxLayout;
layout->addWidget( gw->getGLWidget() );
setLayout( layout );
}
_thread.viewerPtr = &_viewer;
_thread.start();
}
protected:
osgViewer::Viewer _viewer;
RenderThread _thread;
};
int main( int argc, char** argv )
{
QApplication app( argc, argv );
osg::Camera* camera = createCamera( 50, 50, 640, 480 );
//osg::Node* scene =
osgDB::readNodeFile("C:/datosVSS/modelos/base.obj");
osg::Node* scene = osgDB::readNodeFile("cow.osg");
ViewerWidget* widget = new ViewerWidget(camera, scene);
widget->setGeometry( 100, 100, 800, 600 );
widget->show();
return app.exec();
}
_____________________________________________________________
Thank you!
Cheers,
Francisco
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=49899#49899
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