[vtkusers] Problem with lookup table

[Eric E. Monson]

Hey Eugen,

I don' t know if this is an issue or not, but you also seem to be  
setting the active scalars to "v", but are generating your lookup  
table according to the range of "u".

-Eric


On Mar 20, 2009, at 10:53 AM, Jeff Baumes wrote:

> Try
>
> mesh_mapper.UseLookupTableScalarRangeOn()
>
> By default the mapper uses its own range setting. Alternately you can
> change the mapper's range directly with
>
> mesh_mapper.SetScalarRange(urange[0],urange[1])
>
> Jeff
>
> On Fri, Mar 20, 2009 at 4:19 AM, Eugen Wintersberger
> <eugen.wintersberger at jku.at> wrote:
>> Hi there
>>  I wrote a small Python script that should visualize a vtk data file.
>> The script you find attached to this mail. The output of the script
>> looks like this:
>>
>> vtkPointData (0x94d9e0)
>>  Debug: Off
>>  Modified Time: 178
>>  Reference Count: 2
>>  Registered Events: (none)
>>  Number Of Arrays: 4
>>  Array 0 name = u
>>  Array 1 name = v
>>  Array 2 name = w
>>  Array 3 name = xGe
>>  Number Of Components: 4
>>  Number Of Tuples: 571460
>>  Copy Tuple Flags: ( 1 1 1 1 1 0 1 )
>>  Interpolate Flags: ( 1 1 1 1 1 0 0 )
>>  Pass Through Flags: ( 1 1 1 1 1 1 1 )
>>  Scalars:
>>    Debug: Off
>>    Modified Time: 132
>>    Reference Count: 2
>>    Registered Events: (none)
>>    Name: v
>>    Data type: float
>>    Size: 571460
>>    MaxId: 571459
>>    NumberOfComponents: 1
>>    Information: 0
>>    Name: v
>>    Number Of Components: 1
>>    Number Of Tuples: 571460
>>    Size: 571460
>>    MaxId: 571459
>>    LookupTable: (none)
>>    Array: 0x17bfde0
>>  Vectors: (none)
>>  Normals: (none)
>>  TCoords: (none)
>>  Tensors: (none)
>>  GlobalIds: (none)
>>  PedigreeIds: (none)
>>
>>
>> (-0.12224852293729782, 0.12240850925445557)
>> vtkLookupTable (0xc05670)
>>  Debug: Off
>>  Modified Time: 188
>>  Reference Count: 1
>>  Registered Events: (none)
>>  Alpha: 1
>>  VectorMode: Component
>>  VectorComponent: 0
>>  TableRange: (-0.122249, 0.122409)
>>  Scale: Linear
>>  HueRange: (0, 0.66667)
>>  SaturationRange: (1, 1)
>>  ValueRange: (1, 1)
>>  AlphaRange: (1, 1)
>>  NumberOfTableValues: 256
>>  NumberOfColors: 256
>>  Ramp: Linear
>>  InsertTime: 0
>>  BuildTime: 189
>>  Table:
>>    Debug: Off
>>    Modified Time: 186
>>    Reference Count: 1
>>    Registered Events: (none)
>>    Name: (none)
>>    Data type: unsigned char
>>    Size: 1024
>>    MaxId: 1023
>>    NumberOfComponents: 4
>>    Information: 0
>>    Name: (none)
>>    Number Of Components: 4
>>    Number Of Tuples: 256
>>    Size: 1024
>>    MaxId: 1023
>>    LookupTable: (none)
>>    Array: 0xc06bb0
>> So it seems that the color scale should run over the entire
>> range. However, as can be seen from the output (see attached image  
>> file)
>> the scale runs only from 0 to 1. I am running VTK 5.2.1 on a Ubuntu  
>> 8.10
>> AMD 64 installation. The funny thing is that I observe this problem  
>> when
>> I import the data into paraview too.
>> Is there some miss-configuration of VTK? Has anyone an idea whats  
>> going
>> wrong here?
>>
>> regards
>>   Eugen Wintersbeger
>> --
>> --------------------------------------------
>> |                                          |
>> | Dipl. Ing. Eugen Wintersberger           |
>> | Department of semicondutor physics       |
>> | University of Linz                       |
>> | Altenbergerstrasse 69                    |
>> | A-4040 Linz                              |
>> | Austria                                  |
>> |                                          |
>> | Mobile.: +43 664 3112861                 |
>> | Tel.: +43 732 2468 9605                  |
>> | E-Mail.: eugen.wintersberger at jku.at      |
>> | Skype: eugen20056221                     |
>> | ICQ: 214418739, nickname: thot           |
>> |                                          |
>> --------------------------------------------
>>
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
>>
>> Follow this link to subscribe/unsubscribe:
>> http://www.vtk.org/mailman/listinfo/vtkusers
>>
>>
>
>
>
> -- 
> Jeff Baumes, Ph.D.
> R&D Engineer, Kitware Inc.
> (518) 371-3971 x132
> jeff.baumes at kitware.com
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
>
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers