Generate wood patterns with temperature changes

Script to generate texture via temperature gradients to get horizontal stripes that "look like wood". The last and only updated source code is now on github at https://github.com/MoonCactus/gcode_postprocessors/tree/master/wood

This is the code of my post here: http://betterprinter.blogspot.fr/2012/10/shades-of-brown-with-wood-filament-via.html

The owl is Cushwa's popular design at http://www.thingiverse.com/thing:18218

The picture which highlights the effect on a regular polygonal vas comes from mttwinmill (https://www.thingiverse.com/make:657526)

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This thing is not an object to print, but a set of instruction that will "patch" your gcode file in place (it will be modified), so keep a backup if you need one.

The gcodeFile is the only compulsory parameter. Check the source code for more information.

Initial temperature settings will be overridden by the varying pattern that is generated by this script (a variant of recursive Perlin noise). You can run