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

[Francois Bertel]

I think we should add something similar to  SimpleCocoaVTK  as a test
in Rendering/Testing, but not as an Xcode project example, it should
work as any test, through a call to ctest.

Even if we fix that now, it will prevent us from future breakage.

On 10/30/07, David Cole <david.cole at kitware.com> wrote:
> 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
> >
> >
> > _______________________________________________
> > vtk-developers mailing list
> > vtk-developers at vtk.org
> > http://www.vtk.org/mailman/listinfo/vtk-developers
> >
>
>
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>


-- 
François Bertel, PhD  | Kitware Inc. Suite 204
1 (518) 371 3971 x113 | 28 Corporate Drive
                      | Clifton Park NY 12065, USA