This is a general Serpinski Gasket generator. It was originally written and posted to alt.fractals by Cloister Bell (cloister@milton.u.washington.edu). It was almost completely rewritten by Ron Record (rr@ronrecord.com) in July of 1991.

The mathrec source code is freely redistributable. The author maintains binary distributions for Caldera OpenLinux 3.1, OpenServer, UnixWare 7 and Open UNIX 8. These distributions and the source code are available via:

Binary Distributions
OpenLinux/Open UNIX ftp://ftp2.sco.com/pub/.../RPMS/mathrec-1.1c-1col.i586.rpm (no longer available)
UnixWare 7 ftp://ftp2.sco.com/pub/skunkware/uw7/Packages/mathrec-1.1b.pkg
OpenServer ftp://ftp2.sco.com/pub/skunkware/osr5/vols/mathrec-1.1c-VOLS.tar

Source Code Distributions
Source RPM ftp://ftp2.sco.com/pub/.../SRPMS/mathrec-1.1c-1col.src.rpm (no longer available)
Gzip'd tar archive ftp://ftp2.sco.com/pub/skunkware/src/x11/misc/mathrec-1.1c.tar.gz

Usage includes : 

gasket [-MCRWiu][-S skipnum][-f file][-n numpts][-N numgen][-h high][-w wide]
	where: -M indicates Monochrome
	-C indicates cycle thru saved data files
	-R indicates pick parameters at random
	-W indicates write out parameters each run
	-i indicates infinite mode
	-r recalls saved parameters in $HOME/.gasket
	-u displays this message
	skipnum is the number of points to skip before drawing
	numpts is the number of points per loop (no events processed)
	numgen is the number of loops per gasket
	high and wide indicate the height and width of the window
So, some interesting invocations of gasket might include : 
	% gasket -R -N 3 -i
	% gasket -C -N 4
The first would produce random gaskets with only 3 loops of 10000 points each. It would keep on going forever. The second would cycle through all the stored data files in /usr/local/lib/gasket, exiting after the last entry in the directory is read and displayed. I sometimes use the "-S 20000" option to skip over the first 20000 points, thereby reducing the initial "noise".

While running, you can control gasket by either the keyboard or mouse. The following commands are currently supported :

The format of the data files is as follows : 
	number of vertices (integer)
	coordinates of vertex #1 ( pair of integers)
	coordinates of vertex #2 ( pair of integers)
	:
	:
	coordinates of vertex #n ( pair of integers)
	n by n matrix of 0's and 1's indicating which vertices are connected
For example, the data file for the standard Serpenski gasket is : 
	3
	250 33
	500 466
	0 466
	1 1 1
	1 1 1
	1 1 1
Ron Record
rr@ronrecord.com
11-Jul-91