Hi Wills, Since osgViewer by default will multi-thread the main thread calling the realize() won't be the graphics thread so your glew call will fail.
If you want to init glew then do it in a realize operation - see osgshaderterrain for an example of this. I have to ask way are you trying to use glew? The OSG manages extensions checking all itself and in a way that is thread safe and robust w.r.t multiple graphics contexts. Robert. On 10/18/07, Wills Alan <[EMAIL PROTECTED]> wrote: > > > If I have the following ... > > // ..create traits ... > osg::GraphicsContext* gc = > osg::GraphicsContext::createGraphicsContext(traits); > gc->realize(); > gc->makeCurrent(); > > GLenum err = glewInit(); > > if (err != GL_OK) > // error msg. > else > // ok > > ... then all is well. But if I do ... > > osgViewer::Viewer viewer. > viewer.setUpViewOnSingleScreen(0); > viewer.realize(); > > > GLenum err = glewInit(); > > if (err != GL_OK) > // error msg. > else > // ok > > I get an error: "Missing GL version" > > I'm checking the viewer's graphics context by doing > > std::vector<osg::GraphicsContext*> contexts; > viewer->getContexts(contexts); > > with results: > contexts.size() = 1; > contexts[0]->isRealized() = 1; > contexts[0]->isCurrent() = 1; > > but glewInit() returns an error. What have I missed? > > Thanks, > Alan. > > > The information contained in this E-Mail and any subsequent > correspondence is private and is intended solely for the intended > recipient(s). The information in this communication may be > confidential and/or legally privileged. Nothing in this e-mail is > intended to conclude a contract on behalf of QinetiQ or make QinetiQ > subject to any other legally binding commitments, unless the e-mail > contains an express statement to the contrary or incorporates a formal > Purchase Order. > > For those other than the recipient any disclosure, copying, > distribution, or any action taken or omitted to be taken in reliance > on such information is prohibited and may be unlawful. > > Emails and other electronic communication with QinetiQ may be > monitored and recorded for business purposes including security, audit > and archival purposes. Any response to this email indicates consent > to this. > > Telephone calls to QinetiQ may be monitored or recorded for quality > control, security and other business purposes. > > QinetiQ Limited > Registered in England & Wales: Company Number:3796233 > Registered office: 85 Buckingham Gate, London SW1E 6PD, United Kingdom > Trading address: Cody Technology Park, Cody Building, Ively Road, > Farnborough, Hampshire, GU14 0LX, United Kingdom > http://www.QinetiQ.com/home/legal.html > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
