consists of all points on the surface that have two or more shortest geodesics to
on its surface, cutting the polyhedron on the cut locus will produce a result that can be unfolded into a flat plane, producing the source unfolding.
[1] The source unfolding can also be continuously transformed from the polyhedron to its flat net, keeping flat the parts of the net that do not lie along edges of the polyhedron, as a blooming of the polyhedron.
[2] The unfolded shape of the source unfolding is always a star-shaped polygon, with all of its points visible by straight line segments from the image of
[1] An analogous unfolding method can be applied to any higher-dimensional convex polytope, cutting the surface of the polytope into a net that can be unfolded into a flat hyperplane.