Can I export the grain orientation to file?

[hnanhtuan]

Hi,

Instead of output orientation to pole figures, is this possible to export the grain orientations to a text file (Euler angles with grain ID)?

[rquey]

See options -format and -oridescriptor for the orientations and -statcell for the cell ids. For example:

$ neper -T -n 10 -for tess,ori -oridescriptor euler-bunge -statcell id
$ paste n10-id1.stcell n10-id1.ori > my_file
$ more my_file

1         37.197179036517  115.553777058624  -76.639503389212
2        105.521003175885   43.461191108874 -251.980488627940
3        -91.873632333689   75.154301576985   19.202892350055
4        110.885186539800   84.073133220665 -237.738652042672
5        150.227122784117  142.115997586876    8.467801996822
6         -4.310082553484  126.162896300638   38.073836395362
7        -63.616061949047  132.675705275985  139.550221878575
8        211.666342670873  117.507594909087 -125.560248681629
9       -195.617085362893  127.537894342222  148.168078849176
10       -16.242756178707  115.387981414444   95.316267968320

[Fengyixin-research]

Thanks for your reply. I'm also a beginner to neper, and I have a puzzle about orientation operation: could I use existed . tess file to extract orientation file without generating a new .tess file?

[rquey]

Yes, like this:

 $ neper -T -n 10

========================    N   e   p   e   r    =======================
Info   : A software package for polycrystal generation and meshing.
Info   : Version 4.10.1
Info   : Built with: gsl|muparser|opengjk|openmp|nlopt|libscotch (full)
Info   : Running on 18 threads.
Info   : <https://neper.info>
Info   : Copyright (C) 2003-2024, and GNU GPL'd, by Romain Quey.
Info   : Loading initialization file `/home/rquey/.neperrc'...
Info   : ---------------------------------------------------------------
Info   : MODULE  -T loaded with arguments:
Info   : [ini file] (none)
Info   : [com line] -n 10
Info   : ---------------------------------------------------------------
Info   : Reading input data...
Info   : Creating domain...
Info   : Creating tessellation...
Info   :   - Setting seeds... 
Info   :   - Running tessellation...
Info   : Generating crystal orientations...
Info   : Writing results...
Info   :     [o] Writing file `n10-id1.tess'...
Info   :     [o] Wrote file `n10-id1.tess'.
Info   : Elapsed time: 0.006 secs.
========================================================================

$ neper -T -loadtess n10-id1.tess -for ori

========================    N   e   p   e   r    =======================
Info   : A software package for polycrystal generation and meshing.
Info   : Version 4.10.1
Info   : Built with: gsl|muparser|opengjk|openmp|nlopt|libscotch (full)
Info   : Running on 18 threads.
Info   : <https://neper.info>
Info   : Copyright (C) 2003-2024, and GNU GPL'd, by Romain Quey.
Info   : Loading initialization file `/home/rquey/.neperrc'...
Info   : ---------------------------------------------------------------
Info   : MODULE  -T loaded with arguments:
Info   : [ini file] (none)
Info   : [com line] -loadtess n10-id1.tess -for ori
Info   : ---------------------------------------------------------------
Info   : Reading input data...
Info   : Importing tessellation...
Info   :     [i] Parsing file `n10-id1.tess'...
Info   :     [i] Parsed file `n10-id1.tess'.
Info   : Writing results...
Info   :     [o] Writing file `n10-id1.ori'...
Info   :     [o] Wrote file `n10-id1.ori'.
Info   : Elapsed time: 0.012 secs.
========================================================================