Thanks for your effort.
The code wasn't pseudo code. It compiled well. Of course it is useless
but it shows my problem.
Here is what i found out:
===================================
osg::Group* root = new osg::Group();
Viewer* wnds = new Viewer();
wnds->setSceneData(root); // <--- crashing here
wnds->setUpViewOnSingleScreen();
wnds->realize();
===================================
Viewer wnds;
wnds.setUpViewOnSingleScreen();
wnds.realize(); // <--- crashing here
===================================
osg::Group* root = new osg::Group();
Viewer wnds;
wnds.setSceneData(root);
wnds.setUpViewOnSingleScreen();
wnds.realize();
//working!!!!!!!
===================================
Comparing example 1 and 3:
I was wondering, whats the big difference here between using a pointer
(doesn't matter if a ref_ptr or plain C-pointer) and the stack. It
should just be a matter of where i want my memory to be allocated and
how to proceed with the memory, if the variable or pointer gets out of
scope. Is the new operator overloaded?
In example 2 it seems a call to setSceneData() is very important for the
viewer class....
Any comments?
However, nice to see it working now.
Thanks
-- Matthias
Robert Osfield wrote:
> Hi Mathias,
>
> On 8/29/07, Matthias Weigand <[EMAIL PROTECTED]> wrote:
>
>> thanks for your reply. I switched to using the Viewer class. The code is:
>>
>> #include <osgViewer/Viewer>
>> using namespace osg;
>> int main()
>> {
>> osgViewer::Viewer* wnds = new osgViewer::Viewer();
>> wnds->setUpViewOnSingleScreen();
>> wnds->realize();
>> return 0;
>> }
>>
>> Calling realize() crashes my app with a segfault.
>> No error message is written to stdout or stderr during execution.
>>
>> I'm using Visual Studio 8 on WinXP Pro SP2 (32-bit).
>> My OpenSceneGraph version is the official stable 2.0.
>> I build up a clean project with include-dir
>> D:\SDK\OpenSceneGraph\include and lib-dir D:\SDK\OpenSceneGraph\lib and
>> osg.lib as additional library. No ATL, no MFC, nothing.
>>
>> What may cause such a problem?
>>
>
> I presume your code extract is psedo code as it has a number of issues.
>
> First up if you are going to create a viewer on the heap via new use
> ref_ptr<Viewer> instead of a C pointer to make sure the memory is
> cleaned up correctly.
>
> Second, there is now scene assignment i.e. viewer.setSceneData(mySceneGraph);
>
> Third, your realize the viewer but then do run any frame loop of any
> kind, so you at minimum need to add a viewer.run().
>
> All of this illustrated in the examples.
>
> Robert.
> _______________________________________________
> osg-users mailing list
> [email protected]
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>
>
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