Returns shape points of a pentagram. They can be used with xxx_extrude modules of dotSCAD. The shape points can be also used with the built-in polygon module.
r: The length between the center and a tip.
use <shape_pentagram.scad>; polygon(shape_pentagram(5));
use <shape_pentagram.scad>; use <golden_spiral_extrude.scad>; shape_pts = shape_pentagram(2); golden_spiral_extrude( shape_pts, from = 5, to = 10, point_distance = 1, scale = 10 );