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

[Ali Habib]

On Wed, Oct 7, 2009 at 9:36 PM, Ali Habib <ali.mahmoud.habib at gmail.com>wrote:

>  Am sorry but the erro still appear .
>
> I just need to create a tetrahedral mesh on 3D volume
>
> best regards
>
>   On Wed, Oct 7, 2009 at 9:29 PM, David E DeMarle <
> dave.demarle at kitware.com> wrote:
>
>> Try changing it to SetScalarModeToUsePointData()
>>
>> 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 3:28 PM, Ali Habib <ali.mahmoud.habib at gmail.com>
>> wrote:
>> > 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
>> >> >
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>> >> >
>> >
>> >
>>
>
>
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