[Paraview] Bug in image Calculator?

[Max Schoebinger]

Hello,

I have attached the files I have used. For verification of vector
orientation I have used the glyph-filter with the following settings for
all images:

    Orient-Mode = Vector
    Scale Mode = Vector Magnitude
    Scale Factor =  1
    Vectors = Image File

If I  "transform" the file coordinateField_3x3x3.mhd (see image
vectors-before-calculate.png) using the image calculator and the formula
ImageFile_0*iHat - ImageFile_1*jHat + ImageFile_2*kHat paraview-1.4.2
gave me the results i expected (vectors-after-calculate.png). Using
paraview versions >= 1.6 the glyphed output of the calculator looks the
same as depicted in vectors-before-calculate.png.

Note: in the current cvs version a bug has been fixed, which resulted in
flipped vector fields if they were read from mhd files. So if you use
the cvs-version from today, you have to swap the to images in mind ;-)
Anyway, i think this is unrelated to the calculator behaviour i am
observing.

Thanks,

Max

Berk Geveci wrote:
> I cannot reproduce this in ParaView 2.0 and the development version.
> How are you verifying that the vectors are not flipped? Are you using
> the glyph filter? If yes, did you make sure you are using the right
> vector in glyph (where it says Vectors on the Orient/Scale interface)?
> 
> -Berk
> 
> On 5/13/05, Max Schoebinger <m.schoebinger at dkfz-heidelberg.de> wrote:
> 
>>Hi,
>>
>>if I try to flip the orientation of the y-component of the vectors in a
>>vector field according to the description given in
>>http://public.kitware.com/pipermail/insight-users/2004-August/010250.html
>>using the formula ImageFile_0*iHat - ImageFile_1*jHat + ImageFile_2*kHat
>>using all paraview versions above 1.4 nothing happens (which means, that
>>the output vector field is the same as the input vector field). Using
>>paraview 1.4.2 the results were as expected...
>>
>>Thanks,
>>
>>Max
>>_______________________________________________
>>ParaView mailing list
>>ParaView at paraview.org
>>http://www.paraview.org/mailman/listinfo/paraview
>>
> 
> 


-- 
Dipl.-Inform. Med. Max Schöbinger
Deutsches Krebsforschungszentrum       (German Cancer Research Center)
Div. Medical & Biological Informatics          Tel: (+49) 6221-42 2370
Im Neuenheimer Feld 280                        Fax: (+49) 6221-42 2345
D-69120 Heidelberg                       E-Mail: M.Schoebinger at dkfz.de

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