I think what Ken is recommending against using the color map defined in a VTK file. ParaView has its own way of loading custom color maps defined as XML files.
-berk On Mon, Aug 18, 2008 at 11:27 AM, Phil Goddard <[EMAIL PROTECTED]> wrote: > > If I read you correctly then you're saying that using (or at least loading) > a custom color map is not recommended as it may lead to unexpected results. > That seems strange for a visualization package. > > That being said, I have upgraded to the latest version, and the default > lookup table is fine for my initial purposes. > > Thanks > Phil. > >> -----Original Message----- >> From: Moreland, Kenneth [mailto:[EMAIL PROTECTED] >> Sent: August 18, 2008 6:34 AM >> To: Phil Goddard; [email protected] >> Subject: RE: [Paraview] Problem reading/using STRUCTURED_GRID data >> >> >> First, let me recommend that you update your version of >> ParaView (which you can download from www.paraview.org). >> Version 2.4 was released several years ago and is no longer supported. >> >> That said, I see that the behavior you describe also exists >> in the latest released version (3.2). It looks like the data >> file is defining a lookup table with a domain from 0 to 1. >> You can fix the problem by simply not defining a lookup table >> for the data in the file. Change the line "LOOKUP_TABLE lut" >> to "LOOKUP_TABLE default" and the ParaView lookup table will >> be used as expected. You can also delete the entire >> LOOKUP_TABLE section at the bottom of the file. >> >> Why the lookup table defined in the file is scaling from 0 to >> 1 and how to get past that, I don't know. Personally, I >> don't use this feature and don't recommend it to any ParaView >> users because it has dubious value and usually leads to >> confusing results (as you have just found). If you really >> care about this feature, you should bring it up with the >> vtkusers list. >> >> -Ken >> >> > -----Original Message----- >> > From: [EMAIL PROTECTED] >> > [mailto:[EMAIL PROTECTED] >> > On Behalf Of Phil Goddard >> > Sent: Sunday, August 17, 2008 11:38 PM >> > To: [email protected] >> > Subject: [Paraview] Problem reading/using STRUCTURED_GRID data >> > >> > >> > I'm attempting to use Paraview for the first time, and >> trying to get a >> > feel for it by reading in a simple sample data set. >> > However the results are not as I expect and I'm wondering >> if someone >> > could give me some idea of what I am doing wrong. >> > I'm using version 2.4, release 4 from the CD that comes >> with the VTK >> > Users Guide (VTK 5.0.4) on Windows 2000. >> > My data file is appended below. >> > >> > From my understanding of my .vtk file I expect to see all points at >> > z=0 as red, z=1 as green and z=2 as blue. >> > What I actually see is the points at z=1 being blue (z=0 >> and z=2 are >> > red and blue respectively). >> > >> > If I use a probe to look at the data, those at z=1 seem to have a >> > value of >> > 1 >> > as I expect. >> > >> > If I change the Representation to Surface then the sides of >> the cube >> > have the colours >> > 0<red<0.33 >> > 0.33<green<0.66 >> > 0.66<blue<2 >> > >> > Also, if I display the Scalar Bar and set its Resolution >> property to 3 >> > then I get a Scalar Bar showing 0<blue<0.66<green<1.33<red<2. >> > This is the reverse of the lookup table that I have read in. >> > >> > So several questions: >> > 1. Why when viewed as points are those at z=1 not green? >> > 2. Why when viewed as a Surface do I get the colors described above? >> > 3. Why does the Scalar Bar have the colours reversed (from >> what I expect)? >> > >> > Much appreciated >> > Phil. >> > >> > >> > %%%%%%%%%%%% CUT HERE %%%%%%%%%%%%%%%% # vtk DataFile >> Version 2.0 Test >> > data for a cube in 3D space ASCII >> > >> > DATASET STRUCTURED_GRID >> > DIMENSIONS 3 3 3 >> > POINTS 27 float >> > 0 0 0 >> > 1 0 0 >> > 2 0 0 >> > 0 1 0 >> > 1 1 0 >> > 2 1 0 >> > 0 2 0 >> > 1 2 0 >> > 2 2 0 >> > 0 0 1 >> > 1 0 1 >> > 2 0 1 >> > 0 1 1 >> > 1 1 1 >> > 2 1 1 >> > 0 2 1 >> > 1 2 1 >> > 2 2 1 >> > 0 0 2 >> > 1 0 2 >> > 2 0 2 >> > 0 1 2 >> > 1 1 2 >> > 2 1 2 >> > 0 2 2 >> > 1 2 2 >> > 2 2 2 >> > >> > POINT_DATA 27 >> > SCALARS CubeData float 1 >> > LOOKUP_TABLE lut >> > 0.0 >> > 0.0 >> > 0.0 >> > 0.0 >> > 0.0 >> > 0.0 >> > 0.0 >> > 0.0 >> > 0.0 >> > 1.0 >> > 1.0 >> > 1.0 >> > 1.0 >> > 1.0 >> > 1.0 >> > 1.0 >> > 1.0 >> > 1.0 >> > 2.0 >> > 2.0 >> > 2.0 >> > 2.0 >> > 2.0 >> > 2.0 >> > 2.0 >> > 2.0 >> > 2.0 >> > LOOKUP_TABLE lut 3 >> > 1.0 0.0 0.0 1.0 >> > 0.0 1.0 0.0 1.0 >> > 0.0 0.0 1.0 1.0 >> > %%%%%%%%%%%% CUT HERE %%%%%%%%%%%%%%%% >> > >> > >> > _______________________________________________ >> > ParaView mailing list >> > [email protected] >> > http://www.paraview.org/mailman/listinfo/paraview >> >> >> > > > _______________________________________________ > ParaView mailing list > [email protected] > http://www.paraview.org/mailman/listinfo/paraview > _______________________________________________ ParaView mailing list [email protected] http://www.paraview.org/mailman/listinfo/paraview
