terrain generation

emoji_terrain.py

import random
import math

size = (40, 25)
field_types = "🏔⛰🌲🌳🌴🏜🌊"

def voronoi_map():
  no_seeds = 20
  seeds = [
    {
      "type": random.choice(field_types),
      "loc": (
        random.randint(0, size[0]),
        random.randint(0, size[1])
      )
    }
    for _ in range(no_seeds)
  ]

  def  euclidean_dist(a, b):
    d1 = a[0]-b[0]
    d2 = a[1]-b[1]
    return math.sqrt(d1**2 + d2**2)

  def  manhattan_dist(a, b):
    d1 = a[0]-b[0]
    d2 = a[1]-b[1]
    return abs(d1) + abs(d2)

  def nearest(loc):
    d = None
    field = field_types[0]
    for seed in seeds:
      nd = manhattan_dist(loc, seed["loc"])
      if d is None or nd < d:
        field = seed["type"]
        d = nd
    return field

  map = []
  for y in range(size[1]):
    map_line = []
    for x in range(size[0]):
      new_field = nearest((x,y))
      map_line.append(new_field)
    map.append(map_line)
  return map
  
def main():
  map = voronoi_map()

  for line in map:
    for field in line:
      print(f"{field} ", end="")
    print()

if __name__ == '__main__':
  main()