This directory contains the brute force symmetry determination program and the associated test set. The program source code (in "C") is in symmetry.c. As far as I know, it should be essentially platform-independent (you may have to tinker with #include's a little bit to get it to compile on your system). It is known to work Ok on MS DOS, SGI Irix, and Compaq Tru64. This is the only file you need to get a working program.

symmdos.zip contains a 32-bit extended MS-DOS executable file, which was kindly provided by Mike Peleah. This executable does not necessarily correspond to the source code; as of the time of the last update of this page, it was created from the v. 1.15 of the source code.

symmetry.zip contains the latest source code, together with the test cases.

You are free to use this code as long as you acknowledge me, retain the copyright message in the body, and do not try to sell it. I hope you'll enjoy it.

Important! Thanks to Dr. Thomas Sommerfeld from the University of Heidelberg, who provided a very nice test case, a severe bug in recognition of odd-order improper axes has been found (and fixed) in symmetry. This bug was contained in all versions prior to v. 1.15 of January 25, 2000.