init_from_points

Initializes the given Sphere using the given array of 3D coordinates so that the sphere includes them.

The center of the sphere can either be specified, or will be center of the 3D volume that encompasses all points.

Parameters:

this	the Sphere to initialize
points	an array of Point3D
center	the center of the sphere
n_points	the number of Point3D in the points array

Returns:

the initialized Sphere