VERSION #2 - BIEPACK

This is the second release of the package, containing extensions and 
enhancements of the earlier package.  As before, read the User's Guide
for information on using the package.  The earlier main programs are 
still present, but some new ones have been added.  

1. Extensions for solving the unoccluded radiosity equation.

2. Special tools for handling efficiently polyhedral surfaces, including 
   an illustrative example of their use.

3. A method for handling the normal derivative of a single layer operator, 
   illustrated by solving an exterior Neumann problem on an ellipsoid.

4. Additional tools for calculating and manipulating surface normals.

The large package tripack.f has been split apart into three packages 
named auxpack.f, intpack.f, and tripack.f.  These are all described in
the User's Guide.

If you need additional information on the use of this package, please contact 
Ken Atkinson at the electronic address

              Kendall-Atkinson@uiowa.edu

The programs are available as individual files, and they are available 
combined as a tar file.  For the latter case, proceed as follows when 
using ftp.

	1) Remember to use binary mode for the ftp transfer.

        2) get bie.tar.Z

	3) Place the file in a suitable directory.

	4) Use the uncompress program for your computer system.  This should 
           generate a tar file from the tar.Z file.  On unix systems, you will
           use the command
                  uncompress bie.tar.Z

	5) Use tar with the xvf options on the tar file.  For example,
	   "tar xvf bie.tar".  This should extract the source files.

        6) In the various main program files, the standard input and output
           unit numbers are referred to by the INTEGER variables TML_IN and
           TMLOUT, respectively.  They are presently set to TML_IN=5 and
           TMLOUT=6, the standard unit numbers for Unix systems.  The 
           user will need to change these for other systems.


Please send all comments to Kendall-Atkinson@uiowa.edu.