[Paraview-developers] [Paraview] vtkImageData Plugin, vtkImageData not rendered

Tue Jan 10 13:09:29 EST 2017

Hmm sorry if I had took a closer look I would have seen that
AllocateScalars set a default name "ImageScalars" to the scalar array.
Then don't know what you did but the print says that the name of your array
is "21745593" which is quite strange. Is it what you did?

Could you write your "output" image data to a .VTI file using a
vtkXMLImageDataWriter after initializing it in your RequestData
function and see if you can load in with PV and view it? Share it if you
can't.

Best,

*Joachim Pouderoux*, PhD

*Technical Expert - Scientific Computing Team*
*Kitware SAS <http://www.kitware.fr>*

2017-01-10 2:00 GMT-04:00 Lodron, Gerald <Gerald.Lodron at joanneum.at>:

> Here i printed my vtkImageDataOutput of my plugin in  Request data, may
> that helps…:
>
>
>
> output vtkImageData (00000087ABEB1260)
>
> Debug: Off
>
> Modified Time: 870183
>
> Reference Count: 1
>
> Registered Events: (none)
>
> Information: 00000087AC049A90
>
> Data Released: False
>
> Global Release Data: Off
>
> UpdateTime: 195896
>
> Field Data:
>
> Debug: Off
>
> Modified Time: 870094
>
> Reference Count: 1
>
> Registered Events: (none)
>
> Number Of Arrays: 0
>
> Number Of Components: 0
>
> Number Of Tuples: 0
>
> Number Of Points: 1920000
>
> Number Of Cells: 1917201
>
> Cell Data:
>
> Debug: Off
>
> Modified Time: 870179
>
> Reference Count: 1
>
> Registered Events:
>
> Registered Observers:
>
> vtkObserver (00000087ABC476A0)
>
> Event: 33
>
> EventName: ModifiedEvent
>
> Command: 00000087AC0495E0
>
> Priority: 0
>
> Tag: 1
>
> Number Of Arrays: 0
>
> Number Of Components: 0
>
> Number Of Tuples: 0
>
> Copy Tuple Flags: ( 1 1 1 1 1 0 1 1 )
>
> Interpolate Flags: ( 1 1 1 1 1 0 0 1 )
>
> Pass Through Flags: ( 1 1 1 1 1 1 1 1 )
>
> Scalars: (none)
>
> Vectors: (none)
>
> Normals: (none)
>
> TCoords: (none)
>
> Tensors: (none)
>
> GlobalIds: (none)
>
> PedigreeIds: (none)
>
> EdgeFlag: (none)
>
> Point Data:
>
> Debug: Off
>
> Modified Time: 870183
>
> Reference Count: 1
>
> Registered Events:
>
> Registered Observers:
>
> vtkObserver (00000087ABC475B0)
>
> Event: 33
>
> EventName: ModifiedEvent
>
> Command: 00000087AC0495E0
>
> Priority: 0
>
> Tag: 1
>
> Number Of Arrays: 1
>
> Array 0 name = 21745593
>
> Number Of Components: 1
>
> Number Of Tuples: 1920000
>
> Copy Tuple Flags: ( 1 1 1 1 1 0 1 1 )
>
> Interpolate Flags: ( 1 1 1 1 1 0 0 1 )
>
> Pass Through Flags: ( 1 1 1 1 1 1 1 1 )
>
> Scalars:
>
> Debug: Off
>
> Modified Time: 870148
>
> Reference Count: 2
>
> Registered Events: (none)
>
> Name: 21745593
>
> Data type: unsigned char
>
> Size: 1920000
>
> MaxId: 1919999
>
> NumberOfComponents: 1
>
> Information: 0000000000000000
>
> Name: 21745593
>
> Number Of Components: 1
>
> Number Of Tuples: 1920000
>
> Size: 1920000
>
> MaxId: 1919999
>
> LookupTable: (none)
>
> Vectors: (none)
>
> Normals: (none)
>
> TCoords: (none)
>
> Tensors: (none)
>
> GlobalIds: (none)
>
> PedigreeIds: (none)
>
> EdgeFlag: (none)
>
> Bounds:
>
> Xmin,Xmax: (0, 1599)
>
> Ymin,Ymax: (0, 1199)
>
> Zmin,Zmax: (0, 0)
>
> Compute Time: 870184
>
> Spacing: (1, 1, 1)
>
> Origin: (0, 0, 0)
>
> Dimensions: (1600, 1200, 1)
>
> Increments: (0, 0, 0)
>
> Extent: (0, 1599, 0, 1199, 0, 0)
>
>
>
>
>
>
>
>
>
>
>
>
>
> *Von:* Paraview-developers [mailto:paraview-developers-
> bounces at paraview.org] *Im Auftrag von *Lodron, Gerald
> *Gesendet:* Dienstag, 10. Jänner 2017 06:49
> *An:* Joachim Pouderoux
> *Cc:* Paraview Developer (Paraview-developers at paraview.org); Paraview
> User (paraview at paraview.org)
> *Betreff:* Re: [Paraview-developers] [Paraview] vtkImageData Plugin,
> vtkImageData not rendered
>
>
>
> 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
> <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>:
>
> 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 <+43%20316%208761751>
> general fax: +43-316-876-1751 <+43%20316%208761751>
> web: http://www.joanneum.at/digital
> e-mail: gerald.lodron at joanneum.at
>
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