PK_SHELL_sign_t    


typedef int PK_SHELL_sign_t;


This datatype contains the sign of a shell.


One of these values:

   PK_SHELL_sign_positive_c    shell closes off a finite volume
   PK_SHELL_sign_negative_c    shell closes off an infinite volume
   PK_SHELL_sign_open_c        shell does not close off a volume