The OpenNURBS library uses zlib for mesh and bitmap compression.
The zlib source code distributed with OpenNURBS is a subset of what
is available from zlib.  The zlib code itself has not been modified.
See ftp://ftp.freesoftware.com/pub/infozip/zlib/zlib.html for more 
details.

If you are using opennurbs as a statically linked library, then
you may make calls to the same zlib that opennurbs uses.  All the
necessary header files are included by opennurbs.h.

If you are using opennurbs as a DLL or writing a Rhino plug-in
and you want to use the same zlib that opennurbs uses, then
compile opennurbs_zlib_memory.cpp into your application
and statically link with the same zlib that opennurbs.dll
links with. All the necessary header files are included by
opennurbs.h.

This zlib opennurbs uses is compiled with z_ symbol projectection.
See opennurbs_zlib.h for details.

Zlib has a generous license that is similar to the one for OpenNURBS.
The zlib license shown below was copied from the zlib web page
ftp://ftp.freesoftware.com/pub/infozip/zlib/zlib_license.html
on 20 March 2000.

	/* zlib.h -- interface of the 'zlib' general purpose compression library
	  version 1.1.3, July 9th, 1998

	  Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler

	  This software is provided 'as-is', without any express or implied
	  warranty.  In no event will the authors be held liable for any damages
	  arising from the use of this software.

	  Permission is granted to anyone to use this software for any purpose,
	  including commercial applications, and to alter it and redistribute it
	  freely, subject to the following restrictions:

	  1. The origin of this software must not be misrepresented; you must not
		 claim that you wrote the original software. If you use this software
		 in a product, an acknowledgment in the product documentation would be
		 appreciated but is not required.
	  2. Altered source versions must be plainly marked as such, and must not be
		 misrepresented as being the original software.
	  3. This notice may not be removed or altered from any source distribution.

	  Jean-loup Gailly        Mark Adler
	  jloup@gzip.org          madler@alumni.caltech.edu


	  The data format used by the zlib library is described by RFCs (Request for
	  Comments) 1950 to 1952 in the files ftp://ds.internic.net/rfc/rfc1950.txt
	  (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
	*/

