Hi Ben,
the issue is the following:
- the .dat format that vmtk writes (in vmtksurfacewriter) is essentially a csv
(don't ask me why I didn't name the extension csv directly... bah, I was young
and creative :-) )
- the .dat/.csv format contains point data (or cell data) quantities, one row
per point/cell, while topology is thrown away
- vmtksurfacereader reads surfaces (points + cells), and since .dat is an
extension that Tecplot uses by default, I decided to map it to the Tecplot
format (just like .tec) upon reading
So, what's happening in your case is that vmtk tries to read it in as a Tecplot
file and it fails to parse the file correctly (with an admittedly obscure error
message).
One thing you could do is to export in Tecplot format in the first place (using
vmtksurfacewriter ... -ofile foo.tec), which is quite easy to parse and it is
readable back into vmtk.
Other options are also possible, including extending vmtksurfacereader to
actually support the .dat/.csv format, although in that case you would lose the
connectivity information.
As for your other question: Voronoi diagrams are surfaces, whose vertices (i.e.
points in the vtkPolyData) are centers of maximally inscribed spheres, whose
radius is contained in the point
data array named MaximumInscribedSphereRadius.
So the straight answer to your question is: points.
Hope this helps
Luca
On Apr 23, 2012, at 9:34 PM, Berkowitz, Benjamin M wrote:
> Luca,
>
> I've been getting a bug when writing a .dat file, and trying to read it back
> in:
>
> Reading Tecplot surface file.
> Traceback (most recent call last):
> File "/Users/benberkowitz/vmtk-build/Install/bin/vmtksurfaceviewer", line
> 64, in <module>
> main.Execute()
> File "/Users/benberkowitz/vmtk-build/Install/lib/vmtk/vmtk/pypescript.py",
> line 615, in Execute
> pipe.Execute()
> File "/Users/benberkowitz/vmtk-build/Install/lib/vmtk/vmtk/pype.py", line
> 272, in Execute
> scriptObject.IORead()
> File "/Users/benberkowitz/vmtk-build/Install/lib/vmtk/vmtk/pypescript.py",
> line 567, in IORead
> reader.Execute()
> File
> "/Users/benberkowitz/vmtk-build/Install/lib/vmtk/vmtk/vmtksurfacereader.py",
> line 220, in Execute
> self.ReadTecplotSurfaceFile()
> File
> "/Users/benberkowitz/vmtk-build/Install/lib/vmtk/vmtk/vmtksurfacereader.py",
> line 107, in ReadTecplotSurfaceFile
> self.PrintLog("Reading " + str(numberOfNodes)+" nodes.")
> UnboundLocalError: local variable 'numberOfNodes' referenced before assignment
>
> There is one other question I had. When working with the Voronoi diagrams,
> I'm a little confused as what is actually represented by the data. In the
> .vtp files, if I want to get the centers and locations of the spheres, should
> I be counting and reading the cells or the points in VTK?
>
> Thanks,
> Ben Berkowitz
>
>
>
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