[Paraview] ParaView VTK Legacy File Questions

[Michael Jackson]

When you say "comments" are you just wanting some comments in your data file? or do you want these comments to be rendered/available inside paraview? If the first is what you want (just a way to demark the sections of data) then the XML based vtk files are standard XML so you can use the XML style comments:

<!-- XML Comment  -->

If that does NOT work then Vtk/ParaView is not implementing a standard XML reader.
--
Mike Jackson <www.bluequartz.net>

On Feb 5, 2013, at 10:49 AM, Daniel Levitus wrote:

> The vector data seemed to work fine. I thought I tried that before but must have had an error somewhere. As for the comments, does the XML VTK format allow comments? Or is there another file type that allows comments that is a similar format as the VTK Legacy File? Thank you Mike for your help.
> 
> Best,
> Dan Levitus
> 
> --
> Daniel Levitus
> University of Illinois Champaign-Urbana
> B.S Civil Engineering 2013
> American Society of Civil Engineers | Treasurer
> daniel.levitus at gmail.com | 847-220-2503
> 
> 
> On Tue, Feb 5, 2013 at 9:26 AM, Michael Jackson <mike.jackson at bluequartz.net> wrote:
> The only comment in a vtk legacy file is allowed on the second line of the file and must be 255 chars or less.
> 
> As for the vectors, if you are creating POINT_DATA then you MUST include data for each of the points, whether or not you actually have any data there to represent.
> 
>  You may have to write 3 sets of POINT_DATA, one for each of Tangent, Binormal and Normal. You might be able to put a (0,0,0) as the vector to basically not have it show up but I am not sure if that would work or not.
> 
> Try this:
> 
> # vtk DataFile Version 1.0
> 3D Crack Modeling
> ASCII
> DATASET POLYDATA
> 
> POINTS 4 float
> 0.0 0.0 5.0
> 1.0 0.0 5.0
> 0.0 1.0 5.0
> 1.0 1.0 5.0
> 
> POLYGONS 2 8
> 3 0 1 2
> 3 1 3 2
> 
> LINES 2 6
> 2 0 1
> 2 2 3
> 
> POINT_DATA 4
> SCALARS node_numbering int 1
> LOOKUP_TABLE default
> 0
> 2
> 4
> 6
> 
> VECTORS Binormal float
> 0 1 0
> 0 1 0
> 0 0 0
> 0 1 0
> 
> VECTORS Tangent float
> 0 0 1
> 0 0 1
> 0 0 0
> 0 0 1
> 
> VECTORS Normal float
> 1 0 0
> 1 0 0
> 0 0 0
> 1 0 0
> 
> 
> CELL_DATA 4
> SCALARS cell_numbering int 1
> LOOKUP_TABLE default
> -1
> -1
> 0
> 2
> 
> 
> Then use the Glyph Filter to display the vectors as arrows.
> ___________________________________________________________
> Mike Jackson                    Principal Software Engineer
> BlueQuartz Software                            Dayton, Ohio
> mike.jackson at bluequartz.net              www.bluequartz.net
> 
> On Feb 5, 2013, at 10:05 AM, Daniel Levitus wrote:
> 
> > I realized that my past email was not detailed enough as I was in a rush to get it out, but attached are 3 files that should help explain what I am trying to convey. The image named "No vectors" is what I currently have modeled in ParaView from the data file (also included). What I am hoping to have, is in the data file, a place to enter in the data for 3 different vectors at as many points as I want and then be able to apply a filter via ParaView so that the end result would look like the second image name BNT.
> >
> > Hopefully this makes more sense.Thank you.
> >
> > Dan Levitus
> > --
> > Daniel Levitus
> > University of Illinois Champaign-Urbana
> > B.S Civil Engineering 2013
> > American Society of Civil Engineers | Treasurer
> > daniel.levitus at gmail.com | 847-220-2503
> >
> >
> > On Mon, Feb 4, 2013 at 1:45 PM, Daniel Levitus <daniel.levitus at gmail.com> wrote:
> > I have two questions regarding the VTK Legacy file format.
> >
> > The first being how can one write comments in the file without ParaView returning an error? I have tried #, %, //, /* and none have seemed to work. I have searched online as well and cannot seem to find something that suggests other methods.
> >
> > The second and bit more in depth question is: How can I apply three different sets of vector data to the same point in the Legacy format? I have a simple triangular grid and at certain points I want to be able to declare Tangent, Binormal, and Normal vectors for those points.
> >
> > If more clarification is required please let me know
> >
> > Best,
> > Dan Levitus
> > --
> > Daniel Levitus
> > University of Illinois Champaign-Urbana
> > B.S Civil Engineering 2013
> > American Society of Civil Engineers | Treasurer
> > daniel.levitus at gmail.com | 847-220-2503
> >
> > <BNT.png><No vectors.PNG><Step 0.vtk>_______________________________________________
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