Leaked perlin noise script from BLOX survival

-- Globals
local ReplicatedStorage = game:GetService("ReplicatedStorage")

-- Libraries
local Class = require(ReplicatedStorage.Libraries.Class)
local Arrays = require(ReplicatedStorage.Libraries.Arrays)

-- Modules
local NoiseGeneratorPerlin = require(script.NoiseGeneratorPerlin)

--[[
    NoiseGeneratorOctaves
    Type: Class module

    Provides a simple interface for seeded perlin octaves.
--]]

local NoiseGeneratorOctaves = Class()

--[[
    Called to initialise a new module.
--]]
function NoiseGeneratorOctaves:constructor(random, numOctaves)
    self.numOctaves = numOctaves
    self.generators = {}
    for octave=1, self.numOctaves do
        self.generators[octave] = NoiseGeneratorPerlin.new(random)
    end
end


--[[
    Returns a sample of noise at the given location in 3D space.
--]]
function NoiseGeneratorOctaves:sample(x, y, z, xScale, yScale, zScale)
    x = x / xScale
    y = y / yScale
    z = z / zScale

    local total = 0
    local scale = 0
    local frequency = 1
    for octave=1, self.numOctaves do
        total = total + self.generators[octave]:sample(x * frequency, y * frequency, z * frequency) / frequency
        scale = scale + 1/frequency
        frequency = frequency * 2
    end
    return total / scale
end

--[[
    Returns a sample of noise at the given location in 2D space.
--]]
function NoiseGeneratorOctaves:sample2D(x, z, xScale, zScale)
    return self:sample(x, 0, z, xScale, 1, zScale)
end


return NoiseGeneratorOctaves