arty_thing.py

#!/usr/bin/env python3
import svgwrite
import random
from scipy.spatial import Voronoi
import numpy as np
import math

random.seed(4)

size = (1920, 1080)
dwg = svgwrite.Drawing('test.svg', size=size)

points = [
    (int(random.random()*size[0]*2)-(size[0]/2)
    ,(int(random.random()*size[1]*2))-(size[1]/2))
    for i in range(50)
]

vp = Voronoi(points);
for p in vp.vertices:
    dwg.add(dwg.circle(tuple(p), stroke=svgwrite.rgb(128, 10, 16, '%'), style='stroke-width:1px'))

def vsub(a, b):
    return (a[0]-b[0], a[1]-b[1])

def hsv_to_rgb(h, s, v):
     if s == 0.0: return (v, v, v)
     i = int(h*6.)
     f = (h*6.)-i; p,q,t = v*(1.-s), v*(1.-s*f), v*(1.-s*(1.-f)); i%=6
     if i == 0: return (v, t, p)
     if i == 1: return (q, v, p)
     if i == 2: return (p, v, t)
     if i == 3: return (p, q, v)
     if i == 4: return (t, p, v)
     if i == 5: return (v, p, q)

def vmul(a, s):
    return (
        a[0] *s
        ,a[1] *s
        ,a[2] *s
    )

for r in vp.regions:
    if not r:
        continue
    if -1 in r:
        continue
    r_points = [tuple(vp.vertices[i]) for i in r]
    n = int(random.random()*len(r_points))
    r_points = [*r_points[n:None], *r_points[0:n]]
    dwg.add(dwg.polygon(points=r_points, stroke=svgwrite.rgb(1, 100, 16, '%'), style='stroke-width:1px'))
    for i in range(1, len(r_points)-1):
        tri = [
            r_points[0]
            ,r_points[i]
            ,r_points[i+1]
        ]
        vector_1 = np.array(vsub(tri[1], tri[0]))
        vector_2 = np.array(vsub(tri[2], tri[0]))
        unit_vector_1 = vector_1 / np.linalg.norm(vector_1)
        unit_vector_2 = vector_2 / np.linalg.norm(vector_2)
        dot_product = np.dot(unit_vector_1, unit_vector_2)
        angle = np.arccos(dot_product) * (180/math.pi)
        dwg.add(dwg.polygon(points=tri, fill=svgwrite.rgb(*vmul(hsv_to_rgb(angle, 1, 1), 256), '%'), stroke=svgwrite.rgb(128, 10, 16, '%'), style='stroke-width:1px'))

for p in points:
    dwg.add(dwg.circle(p, stroke=svgwrite.rgb(10, 10, 16, '%'), style='stroke-width:10px'))
dwg.save()