IFS.blanker
Description: This represents a port of a clone. The original work was "Fire"
for "xlock" for Unix X windows systems. This work is a port of the "IFS"
blanker from the AgBlankers by Karlheinz Agsteiner for the Gblanker system.
Kerlheinz was kind enough to provide the source to his work which I used in
addition to source code from Rene Olsen and Alex Carmona.
IFS is known as the "Scrawls of God"
More details on the Interated fuction system:
http://en.wikipedia.org/wiki/Iterated_function_system
Original Source code location:
http://aminet.net/util/blank/AgBlankers1.1.lha
Rene's excellent examples:
http://www.rwo.dk/dl.html
Installation:
Copy the IFS.blanker and IFS.blanker.info to sys:utilities/blankers
Usage:
The module offers several options available via the Module Preferences:
*From the original blanker docs*
The iterated function systems produced by IFS can be controlled by
several parameters adjustable in the Prefs window:
* Functions - Sets the maximum number of random transformation
functions that are used to compute the figures.
The larger this number is the more sophisticated
figures can be drawn. However, even 3 random
functions provide a broad range of different
figures while large systems with 8 or more
functions often tend to result in clouds.
I'd suggest a value of about 4 to 6.
* Iterations - Controls how long IFS computes one figure. Each
iteration performs a computation sequence of
about 100 points. Default is 300 iterations.
Of course, large cloudlike structures are
given a longer calculation time as small
figures do.
* Area - Can be either special or uniformal.
Uniformally drawn figures look a bit more
structured in some cases but wastes much time.
Generally, special is far better.
***Uniform works much better then special, could be a bug.
* Transpose - If set to "no", the center of each figure is
set exactly in the middle of the picture. "Yes"
will cause each IFS being displayed with some
offset from this center.
* ContProb - The probability to paint the next ifs without
clearing the screen first (in percent).
* Decrease - The number of percents substracted from ContProb
after each drawing.
Example: ContProb = 120%, Decrease = 20% will
clear the screen after a drawing with the following
probabilities:
0 120% = always 1 100% = always 2 80% = 8 out of 10
3 60% = 6 out of 10 4 40% = 4 out of 10 5 20% = 2 out of
10 6 0% = never
Thus the setting 120/20 means "draw at least two figures and at most
6".
* Display - Like the other blankers. IFS paints each figure
in the same color so 8 colors should suffice for
the most cases (except for very large ContProbs).
History:
1.0: Initial Release for AmigaOS 4.1 by Bill Borsari
Credits:
Rene Olson for the blanker examples
Alex Carmona for assistance
Andy Broad for assistance
Paul Sadlik for beta testing
Karlheinz Agsteiner for the original Amiga port
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