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November 26, 2015 07:11
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spiral_sphere.py not parametric
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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") |
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