Hi Fred, Ahh you're code tells the story... You are enabling the graphics window clear by the line:
gc->setClearMask( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); Just leave this in it's default value of 0 and it won't clear, the only clear that will happen is the camera's viewport clear. Robert. On Wed, Mar 25, 2009 at 2:44 PM, Frederic Marmond <[email protected]>wrote: > thanks Robert, > > I already did it (here is my test code): > > RECT rect; > GetWindowRect(hwnd,&rect); > > // Set window traits and gc > m_Traits = new osg::GraphicsContext::Traits; > > osg::ref_ptr<osg::Referenced> windata = new > osgViewer::GraphicsWindowWin32::WindowData( hwnd ); > m_Traits->width = 100; //rect.right - rect.left - m_Traits->x; > m_Traits->height = 100; //rect.bottom - rect.top - m_Traits->y; > m_Traits->x = 0; > m_Traits->y = rect.bottom - 0 - m_Traits->height; > > m_Traits->windowDecoration = false; > m_Traits->doubleBuffer = true; > m_Traits->sharedContext = 0; > m_Traits->setInheritedWindowPixelFormat = false; > m_Traits->inheritedWindowData = windata; > osg::GraphicsContext* gc = > osg::GraphicsContext::createGraphicsContext( m_Traits.get() ); > gc->setClearColor( osg::Vec4f(1.2f, 0.2f, 0.6f, 1.0f) ); > gc->setClearMask( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); > > // Create camera > osg::ref_ptr<osg::Camera> camera = new osg::Camera; > camera->setGraphicsContext(gc); > camera->setViewport( new osg::Viewport(m_Traits->x, m_Traits->y, > m_Traits->width, m_Traits->height) ); > camera->setProjectionMatrixAsPerspective( 30.0f, > (double)m_Traits->width/(double)m_Traits->height, 1.0f, 10000.0f ); > camera->setClearMask( GL_DEPTH_BUFFER_BIT ); > > // Create viewer > m_Viewer = new osgViewer::Viewer; > m_Viewer->setThreadingModel( osgViewer::Viewer::SingleThreaded ); > m_Viewer->setCamera( camera.get() ); > m_Viewer->setCameraManipulator( new osgGA::TrackballManipulator ); > > // Set root node of the scene > m_Viewer->setSceneData(osgDB::readNodeFile("D:\\Program > Files\\OpenSceneGraph-2.8.0\\cessna.osg")); > m_Viewer->realize(); > > // Create a thread for the simulation loop > _beginthread(&RenderThread, 0, m_Viewer); > > > > > the camera displays at the right place, right size (0,0,100,100 : top > left corner). But all other window part is filled with background > color. > > I'm in an activeX, I took part of the code of osgActiveX, but I can't > use MFC in my case. > The only notable difference between osgActiveX and my code, is that he > was using GetSafeHwnd(), and I use (for now) GetForegroundWindow() for > hwnd. > As I come from the Linux world, I'm not used to windows subtilities, > and I may be wrong doing this ? > Is there something wrong in that code, or something elsewhere I may looking > at ? > > best regards > Fred > > > > 2009/3/25 Robert Osfield <[email protected]>: > > Hi Fred, > > > > Just set the Camera's viewport so it only covers the part you want to > render > > to. > > > > Robert. > > > > On Wed, Mar 25, 2009 at 2:06 PM, Frederic Marmond <[email protected]> > > wrote: > >> > >> hello world, > >> > >> on a win32 project, I would like to display an osg Viewer in a part of > >> the window. > >> I set my osg::GraphicsContext::Traits with coords I want, set the > >> inheritedWindowData with osgViewer::GraphicsWindowWin32::WindowData( > >> hwnd ) > >> > >> my model is well placed and displayed (in the area I wanted), but the > >> entire window is filled with background color. > >> Is there any way to avoid this? any suggestion ? > >> > >> thanks in advance > >> > >> Fred > >> _______________________________________________ > >> 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 > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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