[Feature request] Centering in 2x2 instead of 1 block and additional shapes

[pegla2108001]

Many of the things I'm working on are centered on a 2x2 as it's somewhat easier to work with, and adding a 2x2 center would be great help.

I would also like to request additional shapes being added: pentagon, hexagon (hex with equal sides), heptagon, octagon, nonagon, decagon, ellipse, equilateral triangle and right-angled triangle, with ellipse, equilateral triangle and right-angled triangle being able to rotate around the player to work in the other axis.

If it's too much to ask, I understand. Your mod is already worth its weight in gold, tenfold.