Re: [osg-users] CompositeViewer and multiple QGLWidgets
Hi Ben, BTW, I've been using the OSGAdapterWidget ... trying to specify sharedContext with traits. AdapterWidget will force you to single-threaded mode, which will make using multiple views painfully slow. QOSGWidget supports the normal OSG multi-threading modes, which is much better. I've looked at all the OSG examples as well as some Delta3D examples, but I can't find one that is Qt based and sharing the graphics context and a single scene. OK, I hadn't understood that you wanted to share the graphics context. We're creating a new context for each view. It works OK for us. I don't know if it would work or how to do it when sharing the context (I've never tried). Sorry I can't help more. J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] CompositeViewer and multiple QGLWidgets
Thanks J-S, I think I have it working now. Although, like you said, the adapter widget will force me to use single-threading mode. My real goal is to have one scene with shared textures, etc. (in shared context) used across multiple windows in a QWorkspace. I wish there was a osgQt library of sorts ... rather than having to tweak example code to get the OSG/Qt support. The Delta3D community provides some Qt/OSG help with their dtQt library. I think it grew out of the Delta3D STAGE development effort (having followed it's code somewhat). They mentioned submitting some of this back to OSG. Here's hoping. Cheers, Ben ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] CompositeViewer and multiple QGLWidgets
Hi Ben, I wish there was a osgQt library of sorts ... rather than having to tweak example code to get the OSG/Qt support. Funny you should mention it, there is now :-) http://www.openscenegraph.org/projects/osg/browser/OpenSceneGraph/trunk/src/osgQt It has some utility classes for fonts and such, but eventually Robert wants to have a full-fledged GraphicsWindow implementation for Qt so that apps can use that directly instead of starting from the examples and possibly diverging wildly from there... Feel free to contribute to that goal if you want :-) J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] CompositeViewer and multiple QGLWidgets
On 4/9/10, Jean-Sébastien Guay jean-sebastien.g...@cm-labs.com wrote: Hi Ben, I wish there was a osgQt library of sorts ... rather than having to tweak example code to get the OSG/Qt support. Funny you should mention it, there is now :-) KUDOS!!! :) Whoo hoo! Btw, I have a great deal of Qt experience. I'll definitely do what I can to contribute back. I've actually been using Qt for quite a while too, but have struggled at times with the Qt/OSG and Qt/Delta3D integration. Cheers, Ben ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] CompositeViewer and multiple QGLWidgets
Can osgViewer::CompositeViewer be used to manage views in different QGLWidgets? I'm trying to develop an application with a CAD-like interface ... showing multiple views of the same scene (e.g. MDI look-and-feel). In this case, the context is to be shared across all the views ... referencing just one scene. Each view should be able to have it's own camera manipulator, event handlers, etc. Any help much appreciated! Cheers, Ben ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] CompositeViewer and multiple QGLWidgets
Haven't tried composite view but i use multiple OSGWidgets with QDockWidgets to
make an MDI app
The
nice thing about dockwidgets is that you can move them outside the app and so
use multiple monitors effectively.
Martin
This is how I use it, with dockwindows in a Qt app
_views is a vector of ViewerQt so I can manipulate the settings in each window
easily
_scene is the root of my OSG model
ViewerQT is just a wrapper around the QOSGWidget example
It also uses a customized version of spherical manipulator that is more
suitable for GIS type apps (allows you to switch views to N,E,S,W plan)
but you can just strip out the setHomeMode() parts if you want to use the
standard one.
This is how I use it, with dockwindows in a Qt app
_views is a vector of ViewerQt so I can have different settings in each window
_scene is the root of my OSG model
Code:
void MainWindow::createView()
{
QString name=QString(View%1).arg(_views.size()+1);
QDockWidget *dock = new QDockWidget(name, this);
_view = new Viewer(dock);
_view-setGeometry(dock-geometry());
dock-setObjectName(name);
dock-setWidget(_view);
if ( _views.empty() ) {
// first one can't be closed
dock-setFeatures(0);
} else{
dock-setFeatures(QDockWidget::AllDockWidgetFeatures);
}
_views.push_back(_view);
addDockWidget(Qt::RightDockWidgetArea, dock);
if ( _scene ) {
_view-setSceneData(_scene-getRoot());
_view-show();
_view-ViewCentre();
}
if ( _views.size() 1 ) {
tabifyDockWidget(_docks.back(),dock);
}
_docks.push_back(dock);
_view-getCamera()-setCullMask(0xff);
}
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=26604#26604
Attachments:
http://forum.openscenegraph.org//files/viewerqt_974.zip
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Re: [osg-users] CompositeViewer and multiple QGLWidgets
Hi Ben, Can osgViewer::CompositeViewer be used to manage views in different QGLWidgets? We use osgViewer::CompositeViewer with multiple instances of a widget similar to QOSGWidget (see the osgViewerQT example) to do what you're talking about. We can either split one widget into 1x1, 1x2, 2x1 or 2x2 configuration, or we can spawn new floating widgets that are a Qt window with a QOSGWidget in them, with a view in the same CompositeViewer. Being separate views in the CompositeViewer, it automatically follows that each one has a separate camera manipulator, event handlers, etc. as you require. The one thing we're having trouble with is the fact that OSG writes into its graphics context whenever it wants, and doesn't necessarily let QT know about it, so overlaying other widgets over the QOSGWidget doesn't work very well (they get erased and flicker). And you have to be careful to make sure OSG's threading and QT's threading don't trip each other up (make each other wait around doing nothing)... But apart from those gotchas, it works well. I don't have specific code to share, but it should be pretty easy to start with the osgViewerQT example and work it into a tech demo of what you're after. Hope this helps, J-S -- __ Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com http://www.cm-labs.com/ http://whitestar02.webhop.org/ ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] CompositeViewer and multiple QGLWidgets
Guys, much thanks for the inputs! I am getting very confused with shared context using Qt and OSG. I've done this many times over the years with straight OpenGL ... just too stupid tonight to figure out what I'm messing up. BTW, I've been using the OSGAdapterWidget ... trying to specify sharedContext with traits. Unfortunately, everything except the first view is outside of its parent Qt widget (that is in a QWorkspace) ... odd. It shows up on the main desktop with no window decorations. Probably not describing this well. Sorry, it's late. I've looked at all the OSG examples as well as some Delta3D examples, but I can't find one that is Qt based and sharing the graphics context and a single scene. Do you have a simple example? I'd give a weeks salary :) ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
