Question

我正在尝试将Ken Perlin's reference implementation of Improved Perlin Noise移植到Python 3，并且遇到了一些问题。我对Python缺乏经验，因此目前无法使用。我在此代码中犯了什么错误？我正在努力使它尽可能忠实于参考实现，同时仍在起作用。任何改进代码的建议将不胜感激。即使只是解释改进的Perlin Noise在数学上的工作方式也会对我有很大帮助。

import math

class ImprovedNoise:
  def noise(x: float, y: float, z: float, self):
    X2 = math.floor(x) & 255
    Y2 = math.floor(y) & 255
    Z2 = math.floor(z) & 255
    x -= math.floor(x)
    y -= math.floor(y)
    z -= math.floor(z)
    u = self.fade(x)
    v = self.fade(y)
    w = self.fade(z)
    A = p[X  ]+Y
    AA = p[A]+Z
    AB = p[A+1]+Z
    B = p[X+1]+Y
    BA = p[B]+Z
    BB = p[B+1]+Z
    # ToDo
    return lerp(w, lerp(v, lerp(u, grad(p[AA  ], x  , y  , z   ),
                                     grad(p[BA  ], x-1, y  , z   )),
                             lerp(u, grad(p[AB  ], x  , y-1, z   ),
                                     grad(p[BB  ], x-1, y-1, z   ))),
                     lerp(v, lerp(u, grad(p[AA+1], x  , y  , z-1 ),
                                     grad(p[BA+1], x-1, y  , z-1 )),
                             lerp(u, grad(p[AB+1], x  , y-1, z-1 ),
                                     grad(p[BB+1], x-1, y-1, z-1 ))))
  def fade(t: float):
    return t * t * t * (t * (t * 6 - 15) + 10)
  def lerp(t: float, a: float, b: float):
    return a + t * (b - a)
  def grad(hash: int, x: float, y: float, z: float):
    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))
  p = [None] * 512
  permutation = [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]

  for i in range(256):
    p[i+256] = permutation[i]
    p[i] = permutation[i]

感谢您抽出时间来帮助我！

将Perlin改进的噪声移植到Python

0 个答案: