this release: V2.2

compilation: 12.08.2001

contents:

freeware clause
system requirements
features
planned
common
known problems

freeware-clause:

This program is free for non-commercial use only. Otherwise please contact me. I cannot take response for any damage caused by the program or abused usage. You also must not change the program (NO OPEN SOURCE!!). If one is interested in parts of the code, please write to stefan@stroems.de. I especially like proposals for further improvement.

• IBM-PC with MS-Win95 or compatible
• about 800kB hard-disk space
• additional space (hd) for temp-files (16 Byte per Pixel)
• as fast CPU as possible

features:

version 2.2:

• use constants (C, D, E) in the AB-sequence
• confirmation when closing a loaded and unchanged parameterfile removed

• restore data from the tempfiles after a crash (maybe)
• further calculation of a part of the picture for better quality where needed
• one more bug in the parser removed

• no installation required: just decompress and start Liapunov.exe
• MDI with multi-threading
• save parameters only for less hd-usage or complete data for further work (colors, continue iterations...)
• suspend&resume calculation
• save pictures as BMP or (good-quality) JPG
• implemented parser with 5 operators and 18 functions; also function-plot and "Feigenbaum-graph"
• fixed formulas with adjustments for faster calculations
• histogram
• free color-transition (any ammount of colors)
• some color-transitions included
• load/save color-transitions independently
• visual method to choose a part of the picture for further calculation including zoom, rotation, resize, move.

• (direct) printing ?
• better smart-iter algorithm
• ...???...

common:

• Please do not link this file but: http://www.stroems.de/index_eng.html(best with hint to the Computer-page). So everyone interested gets the actual release.
• Please also do not link to http://cipmaster.physik.uni-erlangen... , because this links could die soon
• If one finds a good formula with the parser, please inform me (with a ~25kB Jpeg file) so that I maybe can code one more fixed formula for faster calculations!

The program has now more than 4000 lines of source-code, so that there are still some little problems:

little bugs:

• You have to use decimal-commas instead of points in the english version, too! Otherwise I would have had to change the parser, too ;-)
• When scrolling the histogram there are vertical lines. I don't know why they are there.
• I tried to completely avoid floating-point overflows with using the maximum possible results. This may cause some errors in the calculation, but is better than impossible calculation.
• The parser calculates also sqrt(-5) or log(-1) ... This may also cause wrong results.
• If you often pause and resume the calculation, the watermark upper left gets more intense: Then do "apply to picture" in "colors" to get it normal.
• When trying to calculate huge pictures the system may run out of "resources". Then calculate the picture in multiple smaller pics and step them together with a graphic program
• The parser is quite slow :(

• When using the parser please click on "test formula" before calculating, because sometimes there are still the standard error-messages. (program may crash)
• Sometimes strange error-messages appear, but I try to get rid of them with further development :-) (IMPORTANT: If there is an "Anwendungsfehler", save the data before clicking on OK !!!)
• The parser may derive little different to the fixed formulas in some regions of some pictures. That's because of another "correction" at overflows.
• If the picture is not complete after finishing calculation, use "colors --> apply to picture"

Updates at:      www.stroems.de   (--> Computer- page)

e-mail:            stefan@stroems.de