Re: [osg-users] OSG + Qt + threading.
Hi Aurelien,
It seems that already works! I attached code...
Code:
_qtViewer = new osgGenerals::ViewerQT(this);
ui.OSGRenderLayout-addWidget(_qtViewer);
_qtViewer-updateCamera(center,eye,up);
_qtViewer-setSceneData(_mainLogic-getRootGroup());
_qtViewer-startRendering();
Thank you!
Cheers,
Aitor
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#ifndef _OSG_QT_RENDER_H_
#define _OSG_QT_RENDER_H_
#include osgViewer/Viewer
#include osgViewer/GraphicsWindow
#include osgViewer/CompositeViewer
#include osgViewer/ViewerEventHandlers
#include osgGA/TrackballManipulator
#include osg/Notify
#define USE_QT4 1
#if USE_QT4
#include QtCore/QString
#include QtCore/QTimer
#include QtGui/QKeyEvent
#include QtOpenGL/QGLWidget
#include QtCore/QThread
#include QtCore/QMutex
using Qt::WindowFlags;
#else
class QWidget;
#include qtimer.h
#include qgl.h
#include qapplication.h
#define WindowFlags WFlags
#endif
#include iostream
namespace osgGenerals{
class LogFileHandler : public osg::NotifyHandler
{
public:
LogFileHandler( const std::string file )
{ _log.open( file.c_str() ); }
virtual ~LogFileHandler() { _log.close(); }
virtual void notify(osg::NotifySeverity severity,
const char* msg)
{ _log msg; }
protected:
std::ofstream _log;
};
class ViewerQT;
class GLPainter : public QObject
{
Q_OBJECT
public:
GLPainter(ViewerQT *widget);
void stop();
void resizeViewport(const QSize size);
void updateCamera(osg::Vec3f center, osg::Vec3f eye, osg::Vec3f up);
public slots:
void start();
protected:
void timerEvent(QTimerEvent *event);
private:
QMutex mutex;
ViewerQT *glWidget;
bool doRendering;
};
class AdapterWidget : public QGLWidget
{
public:
AdapterWidget( QWidget * parent = 0, const char * name = 0, const
QGLWidget * shareWidget = 0, WindowFlags f = 0 );
virtual ~AdapterWidget() {}
osgViewer::GraphicsWindow* getGraphicsWindow() { return _gw.get(); }
const osgViewer::GraphicsWindow* getGraphicsWindow() const { return
_gw.get(); }
protected:
void init();
virtual void resizeGL( int width, int height );
virtual void keyPressEvent( QKeyEvent* event );
virtual void keyReleaseEvent( QKeyEvent* event );
virtual void mousePressEvent( QMouseEvent* event );
virtual void mouseReleaseEvent( QMouseEvent* event );
virtual void mouseMoveEvent( QMouseEvent* event );
virtual void wheelEvent(QWheelEvent *event);
osg::ref_ptrosgViewer::GraphicsWindowEmbedded _gw;
};
class ViewerQT : public osgViewer::Viewer, public AdapterWidget
{
public:
ViewerQT(QWidget * parent = 0, const char * name = 0, const QGLWidget *
shareWidget = 0, WindowFlags f = 0);
~ViewerQT();
void startRendering();
void stopRendering();
virtual void paintGL();
void updateCamera(osg::Vec3f center, osg::Vec3f eye, osg::Vec3f
up);
protected:
void resizeEvent(QResizeEvent *evt);
void paintEvent(QPaintEvent *);
void closeEvent(QCloseEvent *evt);
GLPainter glPainter;
QThread glThread;
};
}
#endifÿþ# i n c l u d e O S G Q t R e n d e r . h
u s i n g n a m e s p a c e o s g G e n e r a l s ;
G L P a i n t e r : : G L P a i n t e r ( V i e w e r Q T * w i d g e t )
: g l W i d g e t ( w i d g e t )
, d o R e n d e r i n g ( t r u e )
{
}
v o i d G L P a i n t e r : : s t a r t ( )
{
g l W i d g e t - A d a p t e r W i d g e t : : m a k e C u r r e n t ( ) ;
s t a r t T i m e r ( 1 0 ) ;
}
v o i d G L P a i n t e r : : s t o p ( )
{
Q M u t e x L o c k e r l o c k e r ( m u t e x ) ;
d o R e n d e r i n g = f a l s e ;
}
v o i d G L P a i n t e r : : r e s i z e V i e w p o r t ( c o n s t Q S i z e s i z e )
{
Q M u t e x L o c k e r l o c k e r ( m u t e x ) ;
g l W i d g e t - g e t C a m e r a ( ) - s e t V i e w p o r t ( n e w o s g : : V i e w p o r t ( 0 , 0 , s i z e . w i d t h ( ) , s i z e . h e i g h t ( ) ) ) ;
}
v o i d G L P a i n t e r : : t i m e r E v e n t ( Q T i m e r E v e n t * e v e n t )
{
Q M u t e x L o c k e r l o c k e r ( m u t e x ) ;
i f ( ! d o R e n d e r i n g ) {
k i l l T i m e r ( e v e n t - t i m e r I d ( ) ) ;
Q T h r e a d : : c u r r e n t T h r e a d ( ) - q u i t ( ) ;
r e t u r n ;
}
g l W i d g e t - u p d a t e G L ( ) ;
}
v o i d
Re: [osg-users] OSG + Qt + threading.
Hi, when I call glWidget-frame() dont refresh the osg May be the OSG OpenGL context is not the current one. And maybe the OSG OpenGL context is not the same as created by Qt. Have a look at makeCurrent methods in Qt and in OSG : http://qt-project.org/doc/qt-4.8/qglcontext.html#makeCurrent http://www.openscenegraph.org/documentation/OpenSceneGraphReferenceDocs/a00275.html#f9570786bab5518aab85737498af3a30 You can also check a lot of OpenGL context related stuff with gDebugger. if I put a connection between timer and updateGL() fails to call paintGL(). It's probably because in this case, paintGL is called within another thread than main thread, which is not alowed by Qt. Could you post a minimal complete source code ? Cheers, Aurelien -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=46575#46575 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG + Qt + threading.
Hi,
I'm following this example:
http://doc-snapshot.qt-project.org/4.8/demos-glhypnotizer-main-cpp.html
but I fail to refresh the window... is blank.
This is my code on glPainter:
Code:
GLPainter::GLPainter(ViewerQT *widget)
: glWidget(widget)
, doRendering(true)
{
}
void GLPainter::start()
{
glWidget-AdapterWidget::makeCurrent();
QTimer timer;
connect(timer, SIGNAL(timeout()), glWidget, SLOT(updateGL()));
timer.start(10);
startTimer(20);
}
void GLPainter::stop()
{
QMutexLocker locker(mutex);
doRendering = false;
}
void GLPainter::resizeViewport(const QSize size)
{
QMutexLocker locker(mutex);
viewportWidth = size.width();
viewportHeight = size.height();
}
void GLPainter::timerEvent(QTimerEvent *event)
{
QMutexLocker locker(mutex);
if (!doRendering) {
killTimer(event-timerId());
QThread::currentThread()-quit();
return;
}
// glWidget-updateFrame();
}
I initialize the GLWidget like the example and the thread go well but when I
call glWidget-frame() dont refresh the osg and if I put a connection between
timer and updateGL() fails to call paintGL().
What am I doing wrong?
Thank you!
Cheers,
Aitor
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http://forum.openscenegraph.org/viewtopic.php?p=46554#46554
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Re: [osg-users] OSG + Qt + threading.
Hi,
I've had to change several things to works it...
OSGQtRenderThreadManager: public QThread, and the render thread loop is:
Code:
void OSGQtRenderThreadManager::run()
{
_done = false;
osg::notify(osg::INFO) Start OSGRender Thread!std::endl;
while(!_done)
{
emit updateFrame();
msleep(10);
}
osg::notify(osg::INFO) End OSGRender Thread!std::endl;
}
In the constructor of OSGQtTRenderThreadManager I have defined the connection
between these object and void ViewerQT::paintGL():
Code:
connect(this,SIGNAL(updateFrame()),_qtViewer,SLOT(updateGL()));
Now I can update render frame in another frame than GUI main frame!
Thank you!
Cheers,
Aitor
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Re: [osg-users] OSG + Qt + threading.
Hi, Now I can update render frame in another frame than GUI main frame! I don't think so. Because when you do that : Code: connect(this,SIGNAL(updateFrame()),_qtViewer,SLOT(updateGL())); If the this object and _qtViewer belongs to different thread, the connection will be established as a Qt::QueuedConnection and so the updateGL() slot will be executed in the _qtViewer owner thread which is the main thread. I think you can check that by settings breakpoints in updateGL() and check which thread is the current thread within the debugger. Cheers, Aurelien -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=46520#46520 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG + Qt + threading.
Hi Aurelien, You are right! I am emiting a signal to execute painGL() fuction on main thread... I've been looking but I haven't found anything clear... How would I refresh a QGLWidget embedded in a main gui layout from another thread? is possible? Thank you! Cheers, Aitor -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=46522#46522 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG + Qt + threading.
Have a look to this article : http://labs.qt.nokia.com/2011/06/03/threaded-opengl-in-4-8/ I think it's maybe not possible with qt previous 4.8 version, but maybe under some conditions. Basically, you need to call the updateGL() method from the worker thread. Have also a look to this article about threading in Qt : http://labs.qt.nokia.com/2010/06/17/youre-doing-it-wrong/ Cheers, Aurelien -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=46523#46523 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG + Qt + threading.
Ok, so I need to update qt... Thank you! Cheers, Aitor -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=46524#46524 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG + Qt + threading.
Hi,
I'm trying to do the same... but I only get errors... The steps that I follow
are the next:
I create a class OSGQtRenderThreadManager: public OpenThreads::Thread which
contains a variable class ViewerQT : public osgViewer::Viewer, public
AdapterWidget (class AdapterWidget : public QGLWidget).
In the qt application thread I initialize the renderThreadManager and I insert
the QGLWidget variable in a layout:
Code:
_viewerThreadManager = new osgGenerals::OSGQtRenderThreadManager(center, eye,
up, false);
_viewerThreadManager-startThread();
ui.OSGRenderLayout-addWidget(_viewerThreadManager-getQtViewerWidget());
This is de run() of the renderThread:
Code:
void OSGQtRenderThreadManager::run()
{
_done = false;
osg::notify(osg::INFO) Start OSGRender Thread!std::endl;
while(!_done)
{
YieldCurrentThread();
OpenThreads::ScopedLockOpenThreads::Mutex lock(_mutex);
_qtViewer-frame();
}
osg::notify(osg::INFO) End OSGRender Thread!std::endl;
}
I suppose that the problem is in the _qtViewer variable acces from the
application main thread and renderThread... But I dont know how can I fix it.
Can someone help me?! Thank you!
Cheers,
Aitor
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Re: [osg-users] OSG + Qt + threading.
Yes, I'm using one thread per context, which works fine. Although I must admit that I run a single context most of the time. On the other hand, it seems to be the default setting for the example in the OSG source. Nico On Tue, Nov 1, 2011 at 10:02 AM, Aurelien Albert aurelien.alb...@alyotech.fr wrote: Hi Nico, I'm also working with Qt as UI framework with OSG as a 3d renderer. Have you successed to use another threading model than SingleThreaded ? Thank you! Cheers, Aurelien -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=43664#43664 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- Nico Kruithof nghk.nl ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG + Qt + threading.
Hi Nico, I'm also working with Qt as UI framework with OSG as a 3d renderer. Have you successed to use another threading model than SingleThreaded ? Thank you! Cheers, Aurelien -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=43664#43664 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG + Qt + threading.
Hi, I was incorrecly assuming that the QTimer that initiates the rendering of a frame was started from the thread doing the event handling. The solution is very elegant indeed. Best regards, Nico On Sat, Oct 29, 2011 at 2:07 PM, Nico Kruithof n...@nghk.nl wrote: Hello, I'm trying to develop a Qt user interface around OpenSceneGraph Views (using the CompoundViewer). I've seen the OsgViewerQt but was wondering whether the OpenGL rendering could be done in an independent thread. Having rendering and the user interface in the same thread makes the user interface irresponsive when rendering becomes really slow (a few seconds per frame). My thought was to create a osg-window from a separate render thread and forward all events from Qt to the render thread where they are handled. I could block from the Qt thread on an event if necessary. Now if I create an independent view using createGraphicsContext() it creates the window as expected, however it shows up in the task bar as a separate window. Is it possible attach the graphics context to the Qt widget that is the placeholder in the Qt interface? -- Nico Kruithof nghk.nl -- Nico Kruithof nghk.nl ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] OSG + Qt + threading.
Hello, I'm trying to develop a Qt user interface around OpenSceneGraph Views (using the CompoundViewer). I've seen the OsgViewerQt but was wondering whether the OpenGL rendering could be done in an independent thread. Having rendering and the user interface in the same thread makes the user interface irresponsive when rendering becomes really slow (a few seconds per frame). My thought was to create a osg-window from a separate render thread and forward all events from Qt to the render thread where they are handled. I could block from the Qt thread on an event if necessary. Now if I create an independent view using createGraphicsContext() it creates the window as expected, however it shows up in the task bar as a separate window. Is it possible attach the graphics context to the Qt widget that is the placeholder in the Qt interface? -- Nico Kruithof nghk.nl ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
