spiral_sphere.py not parametric

gistfile1.txt

import bpy
import math
import random


def fibonacci_sphere(samples, rseed, granularity):
    # http://stackoverflow.com/a/26127012/1243487
    rnd = 1.
    random.seed(rseed)
    rnd = random.random() * samples

    points = []
    offset = 2. / samples
    increment = math.pi * (3. - math.sqrt(5.)) / granularity

    for i in range(samples):
        y = ((i * offset) - 1) + (offset / 2)
        r = math.sqrt(1 - pow(y, 2))

        phi = ((i + rnd) % samples) * increment

        x = math.cos(phi) * r
        z = math.sin(phi) * r

        points.append([x, y, z])

    return points


def make_spiral_sphere(obj_name, rseed=279, samples=1101, granularity=20):
    verts = fibonacci_sphere(samples, rseed, granularity)
    edges = [[i, i + 1] for i in range(len(verts) - 1)]

    mesh = bpy.data.meshes.new(obj_name + "_mesh")
    mesh.from_pydata(verts, edges, [])
    mesh.update()

    obj = bpy.data.objects.new(obj_name, mesh)
    scene = bpy.context.scene
    scene.objects.link(obj)

make_spiral_sphere("sphere_spiral")