Hi,
This is an MFC program of single document.
The composite viewer sits in the MFC::app, and the program instantiates a
separate osgViewer::View for each MFC::View. Each osgViewer::View have its own
GraphicsContext and the contextID is increased
Code:
void CompositeFk::AddView(const HWND& hwnd, const RECT& rect,
osgViewer::View* view)
{
// Init the GraphicsContext Traits
osg::ref_ptr<osg::GraphicsContext::Traits> traits
= new osg::GraphicsContext::Traits;
// Init the Windata Variable that holds the handle
// for the Window to display OSG in.
osg::Referenced* windata
= new osgViewer::GraphicsWindowWin32::WindowData(hwnd);
// Setup the traits parameters
traits->x = 0;
traits->y = 0;
traits->width = rect.right - rect.left;
traits->height = rect.bottom - rect.top;
traits->windowDecoration = false;
traits->doubleBuffer = true;
traits->sharedContext = 0;
traits->setInheritedWindowPixelFormat = true;
traits->inheritedWindowData = windata;
// Create the Graphics Context
osg::ref_ptr<osg::GraphicsContext> gc
= osg::GraphicsContext::createGraphicsContext(traits);
// Init a new Camera (Master for this View)
osg::Camera* camera = new osg::Camera;
// Assign Graphics Context to the Camera
camera->setGraphicsContext(gc);
gc->getState()->setContextID(++m_nContextID);
//set clear color as deep blue
camera->setClearColor(osg::Vec4f(0,0,0/*0.2f, 0.2f, 0.4f*/, 1.0f));
// Set the viewport for the Camera
camera->setViewport(new osg::Viewport(traits->x,
traits->y, traits->width, traits->height));
camera->setProjectionMatrixAsPerspective( 30.0f,
(double)traits->width/(double)traits->height, 1.0f, 10000.0f );
// Add the Camera to the mainView
view->setCamera(camera);
mv->addView(view);
}
HWND comes from the MFC::View::GetSafeHwnd()
All of the osgViewer::View points to the same osg::Group node.
The texture is correctly copied over all the osgViewer::View.
However the program will crash after opening multiple views, and close any one
of them. (Open single view and close it is OK)
Code:
void C***_View::OnDestroy()
{
// it informs the composite viewer to do removeView(view)
theApp.DeleteView(m_view.get());
CView::OnDestroy();
}
The program will crush on exit of OnDestroy() (not immediately after removeView)
System Configuration:
1. Single NVidia graphics card (8 years old)
2. Windows XP
3. VS 2008 SP1
4. OSG 3.0.1
...
Thank you!
Cheers,
Suyang
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=46525#46525
_______________________________________________
osg-users mailing list
[email protected]
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
