scipy.spatial.SphericalVoronoi.sort_vertices_of_regions¶

SphericalVoronoi.
sort_vertices_of_regions
()[source]¶ Sort indices of the vertices to be (counter)clockwise ordered.
Notes
For each region in regions, it sorts the indices of the Voronoi vertices such that the resulting points are in a clockwise or counterclockwise order around the generator point.
This is done as follows: Recall that the nth region in regions surrounds the nth generator in points and that the kth Voronoi vertex in vertices is the projected circumcenter of the tetrahedron obtained by the kth triangle in _tri.simplices (and the origin). For each region n, we choose the first triangle (=Voronoi vertex) in _tri.simplices and a vertex of that triangle not equal to the center n. These determine a unique neighbor of that triangle, which is then chosen as the second triangle. The second triangle will have a unique vertex not equal to the current vertex or the center. This determines a unique neighbor of the second triangle, which is then chosen as the third triangle and so forth. We proceed through all the triangles (=Voronoi vertices) belonging to the generator in points and obtain a sorted version of the vertices of its surrounding region.