Debug

[dongfeicsu]

Describe the bug

It is possible to perform sphere cutting on a cylinder, and cylinder cutting can also be performed separately. However, when attempting to execute both operations simultaneously, a bug occurs.

To Reproduce

$ neper -T -n 30000 -domain "cylinder(0.22,1)" -transform "cut(sphere(0.5,0.5,1.1.2,1.05),cylinder(0.5,0.5,0,0,0,1,0.2))"

========================    N   e   p   e   r    =======================
Info   : A software package for polycrystal generation and meshing.
Info   : Version 4.4.2-33
Info   : Built with: gsl|muparser|opengjk|openmp|nlopt|libscotch (full)
Info   : Running on 2 threads.
Info   : <https://neper.info>
Info   : Copyright (C) 2003-2022, and GNU GPL'd, by Romain Quey.
Info   : No initialization file found (`/home/bob/.neperrc').
Info   : ---------------------------------------------------------------
Info   : MODULE  -T loaded with arguments:
Info   : [ini file] (none)
Info   : [com line] -n 30000 -domain cylinder(0.22,1) -transform
         cut(sphere(0.5,0.5,1.1.2,1.05),cylinder(0.5,0.5,0,0,0,1,0.2))
Info   : ---------------------------------------------------------------
Info   : Reading input data...
Info   : Creating domain...
Info   : Creating tessellation...
Info   :   - Setting seeds... 
Info   :   - Generating crystal orientations...
Info   :   - Running tessellation...
Info   : Transforming tessellation...
Info   :   - Cutting (experimental)...
Info   :     > sphere(0.5,0.5,1.1.2,1.05)...
Info   :     > cylinder(0.5,0.5,0,0,0,1,0.2)...
Info   :     [o] Writing file `tess.debug'...
face = 122267
edges = 218319 206829 206830 206831 206832 206833 206834 206879 206939 206940 206941 206942 206943 206944 206945 206946 206947 207050 207051 207432 207433 207434 207435 207436 207437 207442 210007 210008 210009 210010 210011 210012 210013 210014 210478 210479 210480 210481 210482 210487 210810 210811 210812 210813 210818 210921 210922 210928 211142 211143 211144 211145 211146 211147 211148 211149 211648 211649 211650 211832 211833 211834 211835 211836 211837 211838 211839 211840 211841 211842 211843 211844 211938 211939 211940 211941 211942 211943 211944 211945 211946 212666 212667 212668 212669 212670 212671 212672 212673 212674 212675 212676 212680 212715 212716 212717 212718 212719 212720 212721 212722 212754 212755 212756 212757 212758 212759 212760 212761 212762 212906 212907 212908 212909 212912 213694 213695 213835 213836 213870 213871 213872 213873 213874 213875 213876 213877 213878 213879 213880 213881 214095 214096 214097 214176 214177 214178 214179 214462 214463 214464 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224311 224320 224321
Info   :     [o] Wrote file `tess.debug'.
Error  : You have discovered a bug in Neper!  Please file an issue at
         https://github.com/rquey/neper/issues.  Thank you.

[rquey]

Thanks for the bug report. -transform cut is experimental and does not work for any input. This one does not seem easy to fix.