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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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