I updated the pastebin with a fix for the gap in the corners.

Very nice, thanks for that

float gap = radius <= 25f ? 2f : radius < 60 ? 1.5f : 0f;

I increased 1.5f to 1f but I didn't really notice a difference. Maybe leaving it at 1f as you had it is better

I noticed quite a bit of a gap when using 25 meters (/awg 25 square), I think this fixes it if you want to confirm

I've also condensed and updated the converted code if you'd like to compare in Notepad++ or such and see what I've changed to learn from it :) There are quite a few of my own changes too just in prep for next update

https://pastebin.com/w4qnfPKr

Save as ArenaWallGenerator.cs

I see you used an enum instead of the shape string. Works for me. Let me know if you see another issue that's up my alley, and I'll take a look. 

Merged post

Updated the pastebin with the fixes for the square rotation, and added a triangle shape for some fun. Hope everyone enjoys the new shapes!

submitted the update, thanks again @magus2621 !

Glad I could help :)