Step 24: Get an ordered list of boundary nodes

This step has become a LOT EASIER in recent years!  There are 2 options:

1. OrbNumber: In the previous Step of this Guide, you were reminded to run application OrbNumber to re-number the nodes of your finite-element grid (.feg) file for minimum bandwidth.
OrbNumber now has a new feature: It always produces an extra output file with a sequential, counterclockwise list of all boundary nodes, featuring their new numbers.
I like to call this a “perimeter (.per) file”.
It is not yet a “boundary conditions (b*.nki) file” but it is a template for creating one.

2. NeoKineMap: If you use my graphical map-making code NeoKineMap to produce a plot of your finite-element grid (.feg) file,
you may notice that another option is to produce an “Overlay” graphical layer containing overlay type #2, which is the “outline of finite-element grid”.
If you run this option, an extra output file is produced, which lists the boundary nodes in sequential, counterclockwise order.
I like to call this a “perimeter (.per) file”.
It is not yet a “boundary conditions (b*.nki) file” but it is a template for creating one.