About Gnofract 4D
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## About Gnofract 4D

This is Gnofract 4D version 3.13. You can find the most recent version of Gnofract 4D from http://gnofract4d.sourceforge.net/.

### Credits and copyright

Gnofract 4D is Copyright 1999-2009 Tim Whidbey (catenary@users.sourceforge.net) , and is distributed under the BSD license. See the file "COPYING" for details.

Gnofract 4D was originally based on Gnofract, written by Aurelien Alleaume (manchot@club-internet.fr) , though none of the original code remains in the current version. Gnofract could once be obtained from http://www.multimania.com/mason/ but this no longer appears to work.

Branko Kokanovic developed and contributed the animation feature. Chris Le Sueur provided parts of the gradient editing feature. Henryk Trappmann provided HSV gradient support. The man page was contributed by Aleksander Adamowski.

The formula language which Gnofract 4D uses originated in Fractint and was substantially enhanced in UltraFractal. However the compiler implementation does not share any code with those programs.

The Gnofract 4D distribution contains palette (.map) files by a number of authors which were originally distributed with Fractint under somewhat murky licensing conditions. It also contains a copy of "standard.ucl", originally distributed with UltraFractal, by kind permission of Frederik Slijkerman, Damien Jones, and Kerry Mitchell. "blatte1.ugr" and "blatte2.ugr" are included by kind permission of 'Blatte'. The formulas in Sterling2.frm are translations of formulas originally created by Tad Boniecki for use with the SterlingWare 2 fractal program.

`gmpy.c` and `gmpy.h` are from the GMPY package (http://gmpy.sf.net), and are distributed under the LGPL license.

`lex.py` and `yacc.py` come from the PLY package, and are distributed under the LGPL license.

Some of the menu icons are taken or adapted from the Tango icon set.

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