单纯噪声的随机种子

Question

我正在为游戏生成地形。我给了单纯噪声。地形的产生非常漂亮。但是，当我多次运行程序时，地形完全相同。如何随机化单纯噪声？

from opensimplex import OpenSimplex
import random
from time import time
height = 40
width = height
scale = height / 10
value = [[0 for x in range(width)] for y in range(height)]
gen = OpenSimplex()
def noise(nx, ny):
    # Rescale from -1.0:+1.0 to 0.0:1.0
    return gen.noise2d(nx, ny) / 2.0 + 0.5
def printBiome(y, x):
  if value[y][x] <= 2:
    print('O', end = " ")
  elif value[y][x] >= 8:
    print('M', end = " ")
  else:
    print('L', end = " ")
for y in range(height):
    for x in range(width):
        nx = x/width - 0.5
        ny = y/height - 0.5
        value[y][x] = 10 * noise(1 * scale * nx, 1 * scale * ny) +  0.5 * noise(2 * scale * nx, 2 * scale* ny) + 0.25 * noise(4 * scale * nx, 4 * scale * ny)
for y in range(height):
    for x in range(width):
        printBiome(y, x)
    print()

Answer 1

使用 seed=0的opensimplex类默认值。要产生不同的地形，请输入不同的种子值：

import uuid
# http://stackoverflow.com/a/3530326/190597
seed = uuid.uuid1().int>>64
gen = OpenSimplex(seed=seed)