A Question following #929

[changhaoliu-UOM]

Hi Romain and everyone

I have used the code and file as following showing. And the second one is an example using the same code and file from Romain.
I don't know why the output numbers of cells are different (1025and 2943). And is tgere any more settings I need to do. Or I should modify the file.

volume.txt

 $ neper -T -n from_morpho -morpho "size:custom(volume.txt),1-sphericity:lognormal(0.145,0.03)" -dim 3 -domain "cube(2154.3,2154.3,2154.3)" -o mytess

========================    N   e   p   e   r    =======================
Info   : A software package for polycrystal generation and meshing.
Info   : Version 4.10.2-1
Info   : Built with: gsl|muparser|opengjk|openmp|nlopt|libscotch (full)
Info   : Running on 16 threads.
Info   : <https://neper.info>
Info   : Copyright (C) 2003-2024, and GNU GPL'd, by Romain Quey.
Info   : Loading initialization file `/home/changhao/.neperrc'...
Info   : ---------------------------------------------------------------
Info   : MODULE  -T loaded with arguments:
Info   : [ini file] (none)
Info   : [com line] -n from_morpho -morpho
         size:custom(volume.txt),1-sphericity:lognormal(0.145,0.03) -dim
         3 -domain cube(2154.3,2154.3,2154.3) -o mytess
Info   : ---------------------------------------------------------------
Info   : Reading input data...
Info   : Creating domain...
Info   : Creating tessellation...
Info   :     [i] Parsing file `volume.txt'...
Info   :     [i] Parsed file `volume.txt'.
Info   :       . Number of cells: 1025
Info   :   - Setting seeds... 100%
Info   :   - Running tessellation...
Info   :     > Initial solution: f   =1.087495701
Info   :     > Iteration   119093: fmin=0.894542185 f=0.894542185
Info   :     > Final solution  : f   =0.894542185 (1193 iterations)
Warning:     > Stopping on Ctrl+C invocation.
Info   : Generating crystal orientations...
Info   : Writing results...

$ neper -T -n from_morpho -morpho "size:custom(volume.txt),1-sphericity:lognormal(0.145,0.03)" -dim 3 -domain "cube(2154.3,2154.3,2154.3)" -o mytess                                                                    

========================    N   e   p   e   r    =======================
Info   : A software package for polycrystal generation and meshing.
Info   : Version 4.10.2-1
Info   : Built with: gsl|muparser|opengjk|openmp|nlopt|libscotch (full)
Info   : Running on 16 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 from_morpho -morpho
         size:custom(volume.txt),1-sphericity:lognormal(0.145,0.03) -dim
         3 -domain cube(2154.3,2154.3,2154.3) -o mytess
Info   : ---------------------------------------------------------------
Info   : Reading input data...
Info   : Creating domain...
Info   : Creating tessellation...
Info   :     [i] Parsing file `volume.txt'...
Info   :     [i] Parsed file `volume.txt'.
Info   :       . Number of cells: 2943
Info   :   - Setting seeds... 100%
Info   :   - Running tessellation...
Info   :     > Initial solution: f   =1.095870019
Info   :     > Iteration   111551629: fmin=1.022034153 f=1.022155726
r     3424386: fmin==0.001512636 f==0.001512638
Info   :     > Final solution  : f   =0.001512636 (3424386 iterations)
Info   :     > Reached `eps' criterion.
Info   : Generating crystal orientations...
Info   : Writing results...
Info   :     [o] Writing file `mytess.tess'...
Info   :     [o] Wrote file `mytess.tess'.
Info   : Elapsed time: 21045.395 secs.
========================================================================

[rquey]

It seems that the problem comes from input distribution, for which the last point is far apart:

This creates a large box (as you can see above), which is probably not what you want.

It would be preferable to define the distribution with equal (or not too dissimilar) x steps...

[changhaoliu-UOM]

Thank you very much.
And another question is if I every time out the same input distribution, the outcome tess will contain similar volume distribution. So how about the location of grains?

[rquey]

Use different -id values to get different tessellations.