[osg-users] When to use AdapterWidget vs QOSGWidget?

Robert Osfield robert.osfield at gmail.com
Mon Sep 29 22:59:40 PDT 2008


Hi Martin,

AdapterWidget using GraphicsWindowEmbedded to enable osgViewer to
reuse an already create OpenGL context, this route is easy to
implement, but and it's a big but, it doesn't integrate any of the
high level context management that multi-threading or switching
between contexts requires - this means you can only use it in places
where you have a single viewer per window.

For a fully capably viewer you need to use QOSGWidget which uses
osgViewer itself to create and manage the graphics context, but using
QT to create the window.  This route allows the Viewer/CompositeViewer
to handle multiple contexts and multi-threading.

Robert.

On Mon, Sep 29, 2008 at 11:48 PM,  <mgb at mgbeckett.com> wrote:
> I'm a little confused about the difference between AdapterWidget and QOSGWidget.
>
> As far as I can see AdapterWidget derives from QGLwidget and so should
> be a drop in replacement in any opengl sample.
> But QOSGWidget is a QWidget and so can be used directly in a mainwindow.
>
> Are there any other performance/capability differences between them?
> Which should be the starting point for a new application on QT4
>
> Thanks
> Martin
>
>
>
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