[Paraview] vtkImageData Plugin, vtkImageData not rendered

[Lodron, Gerald]

Hi

Good try but does not effect anything except the string in paraview’s combo box. The strange thing is that I also cannot see anything in spreadsheet view (empty cell and point data)… but on information tab point data and cell data is there….

Von: Joachim Pouderoux [mailto:joachim.pouderoux at kitware.com]
Gesendet: Montag, 09. Jänner 2017 19:40
An: Lodron, Gerald
Cc: Paraview User (paraview at paraview.org); Paraview Developer (Paraview-developers at paraview.org)
Betreff: Re: [Paraview] vtkImageData Plugin, vtkImageData not rendered

Hi Gerald,
Not sure it is the only issue but please try giving a name to the output scalar arrays.
ParaView won't make visible arrays which don't have a name.
Example:
  output->GetPointData()->GetScalars()->SetName("values");
Best,

Joachim Pouderoux, PhD
Technical Expert - Scientific Computing Team
Kitware SAS<http://www.kitware.fr>

2017-01-09 5:20 GMT-04:00 Lodron, Gerald <Gerald.Lodron at joanneum.at<mailto:Gerald.Lodron at joanneum.at>>:
Hi

I programmed successfully a plugin source wich generates a vtkImageData output and made it the same way as on my 3d cloud plugins of vtkPolyData. The source is inherited from vtkImageAlgorithm and only contains one output with unsigned char array and one component.

In the request data function of the filter I currently have a very dummy:

output->SetDimensions(oData.imgSizeX, oData.imgSizeY, 1);
output ->AllocateScalars(VTK_UNSIGNED_CHAR, 1);
 memcpy(output ->GetScalarPointer(), &oData.imgData[0], oData.imgSizeX* oData.imgSizeY*sizeof(unsigned char));

in paraview I see in the information tab that  I have an uniform rectilinear grid with 1917201 cells and 1920000 points (image is 1600*1200px). In data Arrays I get an "ImageScalars" of unsigned char and a correct range of my memcopy data (my min max range is not 0,255 so data seems to be there)...

the problem is that I cannot see anything in the render view, any suggestions what I am making wrong? I tested all representation (slice, surface, outline, on Solid Color and on my array), never see anything.....

I also compared the Information tab on a loaded jpeg image and cannot see any difference (which is rendered in render view except the Array's string name), by the way: can I disable "MapScalars" by default?

I am using pv5.2

------------------------------------------------------------------------------------
Gerald Lodron

Researcher of Machine Vision Applications Group
DIGITAL - Institute for Information and Communication Technologies

JOANNEUM RESEARCH Forschungsgesellschaft mbH
Steyrergasse 17, 8010 Graz, AUSTRIA

phone:   +43-316-876-1751
general fax: +43-316-876-1751
web: http://www.joanneum.at/digital
e-mail: gerald.lodron at joanneum.at<mailto:gerald.lodron at joanneum.at>

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