Using a slightly modified version of the example:

import perlin, random, math

randomize()
let noise = newNoise()

for y in 0..10:
    for x in 0..20:
        echo noise.perlin(-x, -y)

sample from output:

5.716112000000001
3.282981724160003
11.60813961216002
60.05479239680006
205.2020080716802
-4.865088000000002
-7.199699819840007
-23.70134179840006
-83.59753790208008
-238.8913038540804
-3.896455000000001
0.9298921574400039
11.76152181184003
41.58326589440004
119.6164463395202
-8.679456000000002

Numbers are not in the range 0-1 as expected from the docs. Swapping perlin for simplex works as expected

I get an exception:

Traceback (most recent call last)
nimble.nim(1007)         nimble
nimble.nim(939)          doAction
nimble.nim(581)          install
nimble.nim(536)          downloadPkg
download.nim(200)        doDownload
download.nim(164)        verifyClone
packageparser.nim(239)   getPkgInfo
packageparser.nim(230)   readPackageInfo
Error: unhandled exception: Could not read package info file in C:\Users\rsharan\AppData\Local\Temp\\nimble_19652\githubcom_NyctoPerlinNim\perlin.nimble;
  Reading as ini file failed with:
    Invalid section: .
  Evaluating as NimScript file failed with:
    Cannot find nimscriptapi.nim. [NimbleError]

I believe this is due to the wrong path:
C:\Users\rsharan\AppData\Local\Temp\\nimble_19652\githubcom_NyctoPerlinNim\perlin.nimble;. it has 2 slashes after Temp.

Hi, this is pretty useful to have on hand. Nice and simple to use too! I'm wondering though, did you use the straight up Simplex algorithm? If so, I hate to be one of those pesky people when it comes to patents, but can you implement OpenSimplex instead as an option?

https://en.wikipedia.org/wiki/OpenSimplex_noise

Hello, I noticed that there is an issue with the octave range in the applyOctaves template. It will always run octaves + 1 times. This small change fixes the issue:

-    for i in 0..self.octaves:
+    for i in 0..<self.octaves:

Hey!

I think you should make a new release. This fails to compile with the currently released 0.3: https://gist.github.com/jsudlow/0d18514af15603b4d9ad (as reported today on IRC by jsudlow)

Nimble pulls the latest tagged release if there is one, not HEAD.

Hi when compiling on certain systems the randomseed() proc is raising a value out of range error.
I've changed:
uint32(rand(high(int)))
to
uint32(rand(high(int16)))
It seems to have fixed the issue, but I'm not sure why it was happening in the first place. Are you able to shed any light on this?