Hi Mike,
Thanks a lot. I tried a minor trick in PIXELFORMATDESCRIPTOR by setting
the PFD_DOUBLEBUFFER Flag. This has set the things rolling. Now I have an MFC
MDI application running with osgViewer::CompositeViewer. Thanks a lot.
Regards
Harash.
Harash Sharma <[EMAIL PROTECTED]> wrote:
Hi Mike,
Thanks. Your suggestion did work. But now there is another problem. The
window is getting drawn, The window is getting cleared with the specified
color, the scene is getting loaded. But the window appears blank. I have called
the osgViewer::CompositeViewer::frame() function in the CView::OnDraw / OnPaint
functions.
Just for fun when I changed this to osgViewer::CompositeViewer::run(), I
found a flickerring image of the loaded scene. I have the feeling that
somewhere swapBuffers need to be called. Am I right? If yes, then can you guide
me which function to call for this.
Thanks
Regards
Harash
"Hartman, Michael W. (MSFC-NNM06AA05Z)[PEOPLETEC]" <[EMAIL PROTECTED]> wrote:
v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);}
st1\:*{behavior:url(#default#ieooui) } Harash,
This is from an earlier response that I had written that concerned the same
problem you are having. Please give it a try and see if it allows you to
create the graphics context.
Thanks,
Mike Hartman
What I have found working with osgViewer and Windows, is that if you are
assigning OSG to use an existing window/control is that you must set the
pixelformat for that window/control before OSG can render to it. Im not
familiar with QWidget but it sounds like the same problem.
Below is how I am setting the pixel format for the window that I want OSG to
render to.
m_hWnd is the handle to the window/control/QWidget.
//
// We must set the pixelformat before we can create the OSG Rendering Surface
//
PIXELFORMATDESCRIPTOR pixelFormat =
{
sizeof(PIXELFORMATDESCRIPTOR),
1,
PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL,
PFD_TYPE_RGBA,
24,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0,
24,
0,
0,
PFD_MAIN_PLANE,
0,
0, 0, 0
};
HDC hdc = ::GetDC(m_hWnd);
if (hdc==0)
{
::DestroyWindow(m_hWnd);
return 0;
}
int pixelFormatIndex = ::ChoosePixelFormat(hdc, &pixelFormat);
if (pixelFormatIndex==0)
{
::ReleaseDC(m_hWnd, hdc);
::DestroyWindow(m_hWnd);
return 0;
}
if (!::SetPixelFormat(hdc, pixelFormatIndex, &pixelFormat))
{
::ReleaseDC(m_hWnd, hdc);
::DestroyWindow(m_hWnd);
return 0;
}
Michael W Hartman
Senior Software Engineer
Supporting:
VP33 Exploration Systems Development Office
Science & Missions Systems Office
Phone: (256) 544-5250
Email: [EMAIL PROTECTED]
People-Tec, Inc.
1900 Golf Rd., Suite A-B
Huntsville, AL 35802
---------------------------------
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Harash Sharma
Sent: Wednesday, May 09, 2007 6:22 AM
To: osg users
Subject: Re: [osg-users] Multiple Camera Support on Windows (MFC)
Hi all,
Thanks to Robert for his help and support. Following his suggestions I
found the blunder I was making was that somehow I had messed up the library
versions. The versions I was using did not have the inheritedWindowData member
in the osg::GraphicsContext::Traits structure. Anyway, I was able to set things
right on this front by reinstalling OSG1.2 and updating it to 1.9.3 with the
CMake utility.
The problem that I am now facing seems beyond me. The
osg::GraphicsContext is not getting created. I am using the following set of
statements for the purpose:
osg::ref_ptr<osg::GraphicsContext::Traits> traits = new
osg::GraphicsContext::Traits;
traits->x = 0;
traits->y = 0;
traits->width = Rect.Width();
traits->height = Rect.Height();
traits->windowDecoration = false;
traits->doubleBuffer = true;
traits->sharedContext = 0;
osg::ref_ptr<osgViewer::GraphicsWindowWin32::WindowData> wdata = new
osgViewer::GraphicsWindowWin32::WindowData(
GetSafeHwd() );
traits->inheritedWindowData = wdata.get();
osg::ref_ptr<osg::GraphicsContext> gc =
osg::GraphicsContext::createGraphicsContext(traits.get());
if ( gc->valid() ) {
gc->setClearColor(osg::Vec4f(0.2f,0.2f,0.6f,1.0f));
gc->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_view->getCamera()->setGraphicsContext(gc.get());
m_view->getCamera()->setViewport(new osg::Viewport(0,0,
traits->width, traits->height));
}
The program compiles properly, but tracing through the program I found
the GraphicsContext is not getting created. I have confirmed the validity of
the window Handle m_hWnd. It is not null. I tried another thing, If I comment
the statement that links the GraphicsContext Traits to the MFC Window :
traits->inheritedWindowData = wdata.get();
The GraphicsContext gets created. Can anyone tell me what is happening.
Thanks in advance.
Regards
Harash.
Robert Osfield <[EMAIL PROTECTED]> wrote:
Hi Harash,
On 5/8/07, Harash Sharma <[EMAIL PROTECTED]> wrote:
As you had suggested, I tried creating the osgViewer::CompositeViewer
object and to it attached the osgViewer::View. Further, as shown in
osgMultipleCameras example, the traits structure was filled accordingly. The
problem I am now facing is how to attach the MFC Window to the GraphicsContext
/ osgViewer. OSGMFC achieved this by passing the window handle using
GetSafeHwnd() to Producer::RenderSurface. But I could not locate a mechanism of
passing any such information to the osgViewer::View or CompositeViewer or
Viewer. One Win32WindowingSystemInterface class I could locate, but there too
I could not find a way out.
I don't have the code to hand, but if your browse through the osg-users email
archives for the last week you'll see how to use the
osg::GraphicsContext::Traits::inheritedWindowData set to
osgViewer::GraphicsWindowWin32::WindowData(hwnd) to tell the viewer to realize
a window adopting the passed in window. The approach is roughly the same as
done in Producer::RenderSurface previous, only the architecture is a bit
different in osgViewer.
Robert.
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