[vtk-developers] Fwd: vtkUnstructuredGridVolumeRayCastMapper (05B22CB8): Can't use the ray cast mapper without scalars!

[Ali Habib]

Dear David

even with comment this line
volumeUnstructedMapper->SetScalarModeToUseCellData();  the same error appear


what shall I do

On Wed, Oct 7, 2009 at 9:22 PM, David E DeMarle <dave.demarle at kitware.com>wrote:

> You are making scalars here, and associating them with the POINTS of
> the unstructuredgrid.
>
> > unstructuredReader->GetOutput()
> ->GetPointData()->AddArray(arr);
> > unstructuredReader->GetOutput()
> ->GetPointData()->SetActiveScalars("myarray");
>
> Later, you are telling the volume renderer to use CELL associated scalar
> data.
> > volumeUnstructedMapper->SetScalarModeToUseCellData();
>
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 28 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-371-3971 x109
>
>
>
> On Wed, Oct 7, 2009 at 3:15 PM, Ali Habib <ali.mahmoud.habib at gmail.com>
> wrote:
> > Dear All
> >
> > I know it's for developing just , but I sent 6 times to vtk user forum
> > , with no reply helped me , so I am not sure is this bug or not
> >
> > best regards
> >
> > ---------- Forwarded message ----------
> > From: Ali Habib <ali.mahmoud.habib at gmail.com>
> > Date: Tue, Sep 29, 2009 at 9:47 PM
> > Subject: vtkUnstructuredGridVolumeRayCastMapper (05B22CB8): Can't use the
> > ray cast mapper without scalars!
> > To: vtkusers at vtk.org
> >
> >
> > I wrote a code to make tetrahedral mesh on sphere , but it no give result
> > except :
> >
> > ERROR: In
> >
> m:\dev\cur\vtkdotnet\branch\50\VolumeRendering\vtkUnstructuredGridVolumeRayCastMapper.cxx,
> > line 274
> > vtkUnstructuredGridVolumeRayCastMapper (05B22CB8): Can't use the ray cast
> > mapper without scalars!
> >
> > every time I  run the code
> >
> > attached is the c++ code , your fast reply is highly appretiated
> >
> >
> > best regards
> >
> > _______________________________________________
> > Powered by www.kitware.com
> >
> > Visit other Kitware open-source projects at
> > http://www.kitware.com/opensource/opensource.html
> >
> > Follow this link to subscribe/unsubscribe:
> > http://www.vtk.org/mailman/listinfo/vtk-developers
> >
> >
> >
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/vtk-developers/attachments/20091007/078d52fe/attachment.html>