单位球面上的最近邻点，具有大致均匀分布的点

I'm writing a program that implements SCVT (Spherical Centroidal Voronoi Tesselation). I start with a set of points distributed over the unit sphere (I have an option for random points or an equal-area spiral). There will be from a several hundred to maybe 64K points.I'm writing a program that implements SCVT (Sph