Custom seeds give "Found degenerate configuration"

[whishei]

Hi,

I am trying to generate a radially-orientated particle, but I am running into an issue providing the seeds.

This tessellation works fine: $ neper -T -n 4 -dim 2 -id 1 -domain "circle(1)" -morphooptiini "coo:file(coo2.txt)" -o Test4 where coo2.txt contains: 0.25 0.25 0.15 0.75 0.75 0.25 0.75 0.75

But this tessellation produces the following error: $ neper -T -n 4 -dim 2 -id 1 -domain "circle(1)" -morphooptiini "coo:file(coo2.txt)" -o Testing where coo2.txt is the file attached - coo2.txt

======================== N e p e r ======================= Info : A software package for polycrystal generation and meshing. Info : Version 4.1.2 Info : Built with: gsl|muparser|opengjk|openmp|nlopt|libscotch (full) Info : Running on 18 threads. Info : https://neper.info Info : Copyright (C) 2003-2020, and GNU GPL'd, by Romain Quey. Info : No initialization file found (`/home/swhitman/.neperrc'). Info : --------------------------------------------------------------- Info : MODULE -T loaded with arguments: Info : [ini file] (none) Info : [com line] -n 4 -dim 2 -id 1 -domain circle(1) -morphooptiini coo:file(coo2.txt) -o Testing Info : --------------------------------------------------------------- Info : Reading input data... Info : Creating domain... Info : Creating tessellation... Info : - Setting seeds... Info : - Generating crystal orientations... Info : - Running tessellation... Error : > Found degenerate configuration. /var/spool/slurmd/job6646196/slurm_script: line 49: 58224 Aborted (core dumped) neper -T -n 4 -dim 2 -id 1 -domain "circle(1)" -morphooptiini "coo:file(coo2.txt)" -o Testing

[rquey]

That is a degenerate configuration where (in 2D) more than 3 cells meet at a given point. To solve the problem, slightly randomize the coordinates.