[vtk-developers] Problem using VTK in a Cocoa application with the latest VTK (october 26th and later).

[David Cole]

Is that a bug?
Yes.

Would you recommend a particular fix...?


On 10/30/07, Mathieu Coursolle <mcoursolle at rogue-research.com> wrote:
>
> Hi VTK developpers,
>
> I have been investigating a bit, and here is what I noticed.
>
> The way SimpleCocoaVTK is done right now calls
> vtkRenderWindowInteractor::Initialize() before it is rendered
> the first time.
>
> At that point, CreateAWindow in vtkCocoaRenderWindow is called.
> It doesn't matter if the window is created of not. However, OpenGLInit()
> is called, which calls ReadOpenGLExtensions. That seems to required that
> the renderWindow been rendered once at that point (which is not the case).
> If not, it calls render. However, render looks if OnScreenInitialized has
> been set to 1. It has not since we are still in CreateAWindow (it is set
> at the next line).
> Since it has not, it calls CreateAWindow again (which overwrites the one
> we are using)!
>
> Is that a bug?
>
> Thanks!
>
> MAthieu
>
>
> ===========================================================
> Original mail
> ===========================================================
>
> Hi VTK developpers,
>
> We developped a Cocoa application using VTK in an custom NSView.
> However, it stopped working since last Friday (october 26th).
>
> If we use october 25th build, it works all right, but our render
> window will not appear if we use a newer version. The code is based
> on SimpleCocoaVTK  (<http://www.rogue-research.com/VTK/simpleCocoaVTK.html
> >),
> which has the same problem as we do if using the latest VTK (October
> 30th - 15h30).
>
> The vtkRenderWindow disappear at launch. In fact, you can see the render
> window for
> a really short period of time before it disappear.
>
> There is no VTK test which covers that issue (create the view for
> vtkRenderWindow), so the dashboard
> probably did not react to the changes. However, we have been using that
> code for
> the last months without any problem.
>
> Does anyone knows what is the cause of that problem. If so, is there a
> way to solve it?
>
> We are testing on Mac OSX 10.5.
>
> Thanks!
>
> --
> ____________________________________________________________
> Mathieu Coursolle                   mcoursolle at rogue-research.com
> Rogue Research                      www.rogue-research.com
> Montréal, Québec, Canada
>
>
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