Hi Luca,
It really helps! I didn check it in Paraview.
Thanks!
Laurentiu
________________________________
From: Luca Antiga <luca.ant...@orobix.com>
To: Lipsa Laurentiu Mihai <lip_...@yahoo.com>
Cc: "vmtk-users@lists.sourceforge.net" <vmtk-users@lists.sourceforge.net>
Sent: Thursday, March 1, 2012 10:26 AM
Subject: Re: [vmtk-users] Tortuosity with vmtkcenterlinegeometry and
vmtkbranchextractor
Hi Laurentiu,
Tortuosity is actually computed correctly, only that it is stored by cell
(i.e. by centerline), not on a point by point basis (in fact tortuosity is
relative to a whole centerline).
If you look into your vtp files from, say, Paraview, you'll see the tortuosity
array as a cell array, with correct values.
Since the .dat format by default outputs one point per line with the related
point data array values, tortuosity doesn't show up.
To get cell array data, you have to explicitly instruct the writer to output
cell data, this way:
vmtkcenterlinegeometry -ifile christ3_ext_clines.vtp -smoothing 1 -iterations
100 -factor 0.1 --pipe vmtksurfacewriter -i @.o -celldata 1 -ofile
christ3_ext_clgm.dat
Hope this helps
Luca
On Feb 20, 2012, at 11:44 AM, Lipsa Laurentiu Mihai wrote:
Hi Luca,
> I tried to obtain the parameters like curvature, torsion and
>tortuosity with vmtkcenterlinegeometry. The problem is that I don´t obtain any
>values for the tortuosity. I tried to specify the field with -tortuosityarray
>Tortusity but nothing change.
>
>vmtkcenterlinegeometry -ifile christ3_ext_clines.vtp -smoothing 1 -iterations
>100 -factor 0.1 -ofile christ3_ext_clgm.vtp
>
>I tried also with the branch extractor(my geometry doesn´t have a
>bifurcation) and I obtain only one line of data in the file:
>
>vmtkcenterlines -ifile christ3_ext_sm_sm.vtp --vmtkbranchextractor
>--vmtkbranchgeometry -ofile christ3_ext_branchextract.vtp
>
>X Y Z Length Curvature Torsion Tortuosity GroupIds
>0.0 0.0 0.0 92.8727956649 0.0281652486887
-0.534080917615 0.247074326138 0.0
>
> I don´t know if is something missing in the command line or I must to
>use another script for this.
>
>
>Best regards,
>Laurentiu<christ3_ext_clgm.dat><christ3_ext_clines.vtp><christ3_ext_sm_sm.vtp>------------------------------------------------------------------------------
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