dobble.py

import svgwrite
from dataclasses import dataclass
from random import randint, uniform


@dataclass
class Circle:
  x: float
  y: float
  r: float

  @property
  def center(self) -> tuple:
    return (self.x, self.y)

  def intersect(self, c:Circle) -> bool:
    return (self.r + c.r)**2 >= (self.x - c.x)**2 + (self.y - c.y)**2


R = 200
SYMBOLS = 8
OPENMOJI_URL = 'https://openmoji.org/data/color/svg/'
CODES = ['1F98A', '1F984', '1F986', '1F34E', '1F349', '1F43C', '1F454', '1F4BE']


def rand_angle():
  return randint(0, 360)


def inside(c):
  return (R-c.x)**2 + (R-c.y)**2 <= (R-c.r)**2


def ratio():
  return R * uniform(0.2, 0.35)


def rand_circle():
  c = Circle(x=uniform(0, 2*R), y=uniform(0, 2*R), r=ratio())
  if not inside(c):
    return rand_circle()
  return c


def circle_packing(n):
  tmp = []
  while len(tmp) < n:
    c = rand_circle()
    i = 0
    while i < len(tmp):
      x = tmp[i]
      if c.intersect(x):
        tmp[i] = tmp[-1]
        del tmp[-1]
      else:
        i += 1
    tmp.append(c)
  
  return tmp


circles = circle_packing(SYMBOLS)

dwg = svgwrite.Drawing('out.svg', profile='tiny')
dwg.add(dwg.circle(center=(R, R), r=R))

shapes = dwg.add(dwg.g(id='shapes', fill='red'))
for c in circles:
  shapes.add(svgwrite.shapes.Circle(c.center, c.r))

emojis = dwg.add(dwg.g(id='emojis'))
for it in range(SYMBOLS):
  c = circles[it]
  url = OPENMOJI_URL + CODES[it] + '.svg'
  img = svgwrite.image.Image(url, insert=(c.x-c.r, c.y-c.r), size=(2*c.r, 2*c.r))
  img.rotate(rand_angle(), c.center)
  emojis.add(img)

dwg.save()