Reputation: 41
I'm procedurally generating terrain for games. I gave Simplex noise a shot. The terrain is generated beautifully. However, when I run the program multiple times, the terrain is the exact same. How to randomize the Simplex noise?
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()
Upvotes: 2
Views: 1224
Reputation: 880449
The OpenSimplex class defaults to using seed=0
. To generate a different terrain, input a different seed value:
import uuid
# http://stackoverflow.com/a/3530326/190597
seed = uuid.uuid1().int>>64
gen = OpenSimplex(seed=seed)
Upvotes: 2