Square tetraswirlprism

The square tetraswirlprism is a convex isogonal polychoron that consists of 32 square antiprisms, 64 rhombic disphenoids and 128 phyllic disphenoids obtained as a subsymmetrical faceting of the hexadecagonal duoprism. It is the seventh in an infinite family of isogonal digonal prismatic swirlchora, the other being the digonal double octaswirlprism.

Vertex coordinates
Coordinates for the vertices of a square tetraswirlprism constructed as the convex hull of three square duoprisms of edge length 1, are given as Cartesian products of the vertices of square S 1:
 * S 1 × S 1,
 * S 2 × S 2 (S 1 rotated 22.5 degrees),
 * S 3 × S 3 (S 1 rotated 45 degrees),
 * S 4 × S 4 (S 1 rotated 67.5 degrees).