[ABU] 28-May-2023

https://en.wikipedia.org/wiki/Perlin_noise%|%Perlin Noise%|% is a type of gradient noise developed by Ken Perlin in 1983. 

You can find pure-tcl implementations of the Perlin function at
https://rosettacode.org/wiki/Perlin_noise#Tcl%|%Rosetta code%|%
but of course, a binary library such as the following is many many times faster (300x).

This package [Perlin], is a binary package implementing the perlin(x,x,z) function in three dimensions.

This package is distributed in a multi-platform bundle, i.e. it can be used on
   * Windows 32/64 bit
   * Linux 32/64 bit
   * MacOS 64 bit

***Download ***
 
   * [https://sourceforge.net/projects/irrational-numbers/files/perlin-1.0.1.zip/download]  '''perlin-1.0.1''' Multi-platform package (Windows/Linux/MacOSX)
   * [https://sourceforge.net/p/irrational-numbers/code/HEAD/tree/pkgs/perlin-devkit] Perlin Development-Kit. For developers/maintainers. 

***Usage:***
        
======
package require perlin
 # result is a floating number between -1 and +1
set v [perlin 3.14 42.0 7.0]  ;# -->  0.13691995878400012
======

Together with the small basic library, this package provides a demo app named "Perlin Explorer"
you can run for exploring the 3d perlin-space. In particular, it can help developers
to fine-tune the parameters and the "step" increments to control the perlin(x,y,z) variations.

[image-perlin-explorer]