[vtkusers] questions on vtk in win32

[cly]

Hi, Roland,

We hope you do some improvment of the only MFC sample in vtk.
It's better with some interactions, such as slicing, other than only 'mousemoving' and 'zooming'.

Thanks in advance.

Changli,Yao


----- Original Message ----- 
From: "Roland Schwarz" <roland.schwarz at chello.at>
To: "VTK users list" <vtkusers at public.kitware.com>
Sent: Wednesday, March 13, 2002 3:00 AM
Subject: Re: [vtkusers] questions on vtk in win32


> What I've found out so far:
> 
> The example, showing MFC binding simply seems to be outdated.
> 
> You can get rid of the access violatins the following way:
> 
> In the destructor of
> SampleView release the resources:
> 
> CSampleView::~CSampleView()
> {
>     vtkPropCollection *propc;
>     vtkProp *prop;
>     propc = this->Renderer->GetProps();
>     propc->InitTraversal();
>     while (prop = propc->GetNextProp()) {
>         this->Renderer->RemoveProp(prop);
>     }
> }
> 
> I think an even better place would be in the handler of the WM_DESTROY
> message,
> since releasing the resources might access the Window handle, which normally
> has gone
> when the destuctor is seen.
> 
> The problem is, that you may not destroy
> vtkRenderer, vtkRenderInteractor and vtkRenderWindow without releasing its
> graphic resources.
> The above code will do just that.
> 
> If you do not do it like above, the release of the graphic resources is
> delayed (glDisplayLists in this case)
> is delayed until you destroy the mapper object, which is in the scope of
> SampleDoc.
> When you later try to destroy SampleDoc, the Window (which has long gone
> away at this stage) is
> needed again and a crash is the result.
> 
> I am not quite sure what would be the best practice. I just yet ordered a
> copy of the User Manual,
> hopefully getting more insight into the intende correct usage of the
> objects.
> 
> However I'll try to post a overhauled version of the example if some one is
> interested in this.
> ( I would like some vtk-insider having some comments on this. )
> 
> 
> > And what is the function of "ALL_Build" in each folder generated bu CMak?
> > When I build the win32SampleMfc project generated by Cmake (using cmake in
> this example alone ), there is  "Performing Custom Build Step on ALL_BUILD"
> and never stop and response again.
> >
> 
> When the project consists of subprojects (as is the case with VTK library)
> Setting ALL_BUILD as the current project
> and starting a rebuild will compile complete library.
> 
> Roland
> 
> 
> 
> 
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