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Test.py
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import math
import random
permutations = [151, 160, 137, 91, 90, 15,
131, 13, 201, 95, 96, 53, 194, 233, 7, 225, 140, 36, 103, 30, 69, 142, 8, 99, 37, 240, 21, 10, 23,
190, 6, 148, 247, 120, 234, 75, 0, 26, 197, 62, 94, 252, 219, 203, 117, 35, 11, 32, 57, 177, 33,
88, 237, 149, 56, 87, 174, 20, 125, 136, 171, 168, 68, 175, 74, 165, 71, 134, 139, 48, 27, 166,
77, 146, 158, 231, 83, 111, 229, 122, 60, 211, 133, 230, 220, 105, 92, 41, 55, 46, 245, 40, 244,
102, 143, 54, 65, 25, 63, 161, 1, 216, 80, 73, 209, 76, 132, 187, 208, 89, 18, 169, 200, 196,
135, 130, 116, 188, 159, 86, 164, 100, 109, 198, 173, 186, 3, 64, 52, 217, 226, 250, 124, 123,
5, 202, 38, 147, 118, 126, 255, 82, 85, 212, 207, 206, 59, 227, 47, 16, 58, 17, 182, 189, 28, 42,
223, 183, 170, 213, 119, 248, 152, 2, 44, 154, 163, 70, 221, 153, 101, 155, 167, 43, 172, 9,
129, 22, 39, 253, 19, 98, 108, 110, 79, 113, 224, 232, 178, 185, 112, 104, 218, 246, 97, 228,
251, 34, 242, 193, 238, 210, 144, 12, 191, 179, 162, 241, 81, 51, 145, 235, 249, 14, 239, 107,
49, 192, 214, 31, 181, 199, 106, 157, 184, 84, 204, 176, 115, 121, 50, 45, 127, 4, 150, 254,
138, 236, 205, 93, 222, 114, 67, 29, 24, 72, 243, 141, 128, 195, 78, 66, 215, 61, 156, 180]
p = []
for i in range(0, 512):
p.append(permutations[i % 256])
def fade(t):
return t * t * t * (t * (t * 6 - 15) + 10)
def lerp(a, b, x):
return a + x * (b - a)
def grad(hash, x, y, z):
h = hash & 15
u = x if h < 8 else y
v = y if h < 4 else x if h == 12 or h == 14 else z
return (u if (h & 1) == 0 else -u) + (v if (h & 2) == 0 else -v)
def perlin(x, y, z):
xi = int(x) & 255
yi = int(y) & 255
zi = int(z) & 255
xf = x - int(x)
yf = y - int(y)
zf = z - int(z)
u = fade(xf)
v = fade(yf)
w = fade(zf)
aaa = p[p[p[xi] + yi] + zi]
aba = p[p[p[xi] + inc(yi)] + zi]
aab = p[p[p[xi] + yi] + inc(zi)]
abb = p[p[p[xi] + inc(yi)] + inc(zi)]
baa = p[p[p[inc(xi)] + yi] + zi]
bba = p[p[p[inc(xi)] + inc(yi)] + zi]
bab = p[p[p[inc(xi)] + yi] + inc(zi)]
bbb = p[p[p[inc(xi)] + inc(yi)] + inc(zi)]
x1 = lerp(grad(aaa, xf, yf, zf), grad(baa, xf - 1, yf, zf), u)
x2 = lerp(grad(aba, xf, yf - 1, zf), grad(bba, xf - 1, yf - 1, zf), u)
y1 = lerp(x1, x2, v)
x1 = lerp(grad(aab, xf, yf, zf - 1), grad(bab, xf - 1, yf, zf - 1), u)
x2 = lerp(grad(abb, xf, yf - 1, zf - 1), grad(bbb, xf - 1, yf - 1, zf - 1), u)
y2 = lerp(x1, x2, v)
return (lerp(y1, y2, w) + 1) / 2
def inc(num):
num += 1
return num