[Paraview] Bug in image Calculator?

[Berk Geveci]

Hi Max, 

You are glyphing the wrong vectors. Make sure you select "Result" for  Vectors,
not "ImageFile". ImageFile are the original vectors.

-Berk

On 5/13/05, Max Schoebinger <m.schoebinger at dkfz-heidelberg.de> wrote:
> Hi,
> 
> the paraview mailing list bounces my mail because it is slightly too
> large. So I'm not sure, if you've got my e-mail (as CC), so here you get
> it again (see below, worst case you get it the third time ;-) ).
> 
> Thank you for your help,
> 
> Max
> 
> 
> 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
> 
> 
> ObjectType = Image
> NDims = 3
> BinaryData = True
> BinaryDataByteOrderMSB = False
> DimSize = 3 3 3
> ElementNumberOfChannels = 3
> ElementType = MET_UINT
> ElementDataFile = coordinateField_3x3x3.raw
> 
> 
> 
>