🚀 go-pugleaf

> I've been using the CMfcOglView class provided with the
> Microsoft MFCOGL with great success.
> 
> But now I want to create 2 or 3 OpenGL context regions
> all within the same Window. How would I go about doing this?
> 
 Any help would be greatly appreciated.
> clp@alumni.cse.ucsc.edu

What exactly are you trying to do? If you want to render two scenes
in the same window you can just set up two viewports. If you're
trying to do something where you need two different pixel formats,
then it's impossible- you can't have, for example, the left half
double buffered, and the right half not......

Ron Fosner
ron@tiac.net

I want a single window with 2 different OpenGl views, with
several Win95 PushButtons, a single line Text Entry field,
and a cheesy Icon resource below them. Using multiple viewports
on the same OpenGL context doesn't fit my project because each
view is a completely different scene. 

The Dialog Resource Editor in VC++4.0 isn't too helpful unless
I can use it to paint in OpenGL regions.  Hmmm. Maybe you can
do that by specifying a "custom" object class tool module foundation
thing, which would be MfcOglvw. I'll give that a try.  Thanks.

clp@alumni.cse.ucsc.edu

Ron Fosner wrote:
> > But now I want to create 2 or 3 OpenGL context regions
> > all within the same Window. How would I go about doing this?
> >

> What exactly are you trying to do? If you want to render two scenes
> in the same window you can just set up two viewports. If you're
> trying to do something where you need two different pixel formats,
> then it's impossible- you can't have, for example, the left half
> double buffered, and the right half not......
> 
> Ron Fosner
> ron@tiac.net

> Hmmm. Maybe you can
> do that by specifying a "custom" object class tool module foundation
> thing, which would be MfcOglvw. I'll give that a try.  Thanks.

Well, that totally doesn't work.

Next.

In article <3135497E.2AE@alumni.cse.ucsc.edu>, clp@alumni.cse.ucsc.edu 
says...
>
>I've been using the CMfcOglView class provided with the
>Microsoft MFCOGL with great success.
>
>But now I want to create 2 or 3 OpenGL context regions
>all within the same Window. How would I go about doing this?
>
>This routine goes right into setting up the OpenGL context
>without even giving me a chance to specify/setup other windows:
>
>void CMfcOglView::Init()
>{
>        PIXELFORMATDESCRIPTOR pfd;
>        int         n;
>        HGLRC           hrc;
>    m_pDC = new CClientDC(this);
>    if (!bSetupPixelFormat())
>        return;
>    n = ::GetPixelFormat(m_pDC->GetSafeHdc());
>    ::DescribePixelFormat(m_pDC->GetSafeHdc(), n, sizeof(pfd), &pfd);
>    CreateRGBPalette();
>
>    // create a rendering context and make it current
>    hrc = wglCreateContext(m_pDC->GetSafeHdc());
>    wglMakeCurrent(m_pDC->GetSafeHdc(), hrc);
>
>Any help would be greatly appreciated.
>clp@alumni.cse.ucsc.edu

The MSDN article "OpenGL III: Building an OpenGL C++ Class" presents a 
different method for handling multiple OpenGL contexts. 

If you don't have a subscription to MSDN, you can view the article at the 
following location:

        http://www.microsoft.com/MSDN/LIBRARY/TECHNOTE

There are other articles about OpenGL in the same location.

The source code was written for Visual C++ version 2.0 and may need to be 
tweaked for Visual C++ version 4.0.

Dale Rogerson
Microsoft


-- 
The opinions expressed in this message are my own personal views 
and do not reflect the official views of Microsoft Corporation.