src/QuickHull/README.txt

Name

      qhull, rbox         2003.1           2003/12/30
  
Convex hull, Delaunay triangulation, Voronoi diagrams, Halfspace intersection
 
      Documentation:
        html/index.htm

      Available from:
        <http://www.qhull.org>
        <http://savannah.nongnu.org/projects/qhull>
 
     Version 1 (simplicial only):
        <http://www.qhull.org/download/qhull-1.0.tar.gz>
        <http://www.qhull.org/download/qhull.sit.hqx>
       
      News and a paper:
        <http://www.qhull.org/news>
        <http://citeseer.nj.nec.com/83502.html>

Purpose

  Qhull is a general dimension convex hull program that reads a set 
  of points from stdin, and outputs the smallest convex set that contains 
  the points to stdout.  It also generates Delaunay triangulations, Voronoi 
  diagrams, furthest-site Voronoi diagrams, and halfspace intersections
  about a point.  

  Rbox is a useful tool in generating input for Qhull; it generates 
  hypercubes, diamonds, cones, circles, simplices, spirals, 
  lattices, and random points.
  
  Qhull produces graphical output for Geomview.  This helps with
  understanding the output. <http://www.geomview.org>

    
Environment requirements

  Qhull and rbox should run on all 32-bit and 64-bit computers.  Use
  an ANSI C or C++ compiler to compile the program.  The software is 
  self-contained.  
  
  Qhull is copyrighted software.  Please read COPYING.txt and REGISTER.txt
  before using or distributing Qhull.

To cite Qhull, please use

  Barber, C.B., Dobkin, D.P., and Huhdanpaa, H.T., "The Quickhull 
  algorithm for convex hulls," ACM Trans. on Mathematical Software,
  22(4):469-483, Dec 1996, http://www.qhull.org.

To contribute to Qhull

  Qhull is on Savannah at http://savannah.nongnu.org/projects/qhull/

Qhull on Windows 95, 98, ME, NT, 2000, XP

  The zip file contains rbox.exe, qhull.exe, qconvex.exe, qdelaunay.exe, 
  qhalf.exe, qvoronoi.exe, documentation files, and source files.
  
  To install Qhull:
  - Unzip the files into a directory.  You may use WinZip32 <www.hotfiles.com>
  - Click on QHULL-GO
    
  - In Windows 95, the DOS window needs improvement.
      - Increase the size of the screen font to 8x12.
      - If the text is too dim, fix the screen colors with shareware (e.g., crt.exe)
  - If you use qhull a lot, consider using the Cygwin Unix shell (www.cygwin.com),

  To learn about Qhull:
  - Execute 'qconvex' for a synopsis and examples.
  - Execute 'rbox 10 | qconvex' to compute the convex hull of 10 random points.
  - Execute 'rbox 10 | qconvex i TO file' to write results to 'file'. 
  - If an error occurs, Windows 95 sends the error to stdout instead of stderr 
      - use 'TO xxx' to send normal output to xxx and error output to stdout
  - Browse the documentation: qhull\html\index.htm

Compiling with cygwin on Windows NT, 2000, XP
  - install cygwin [www.cygwin.com] with gcc, make, ar, and ln
  - cd qhull/src
  - make -f Makefile.txt

Qhull on Unix (Debian)

  The gzip file, qhull.tar.gz, contains documentation and source files for
  qhull and rbox.  It should compile on all Unix systems, including Debian.
  You may also use the source instructions below.
  
  To unpack the gzip file
  - tar zxf qhull.tar.gz
  - cd qhull
  
  Compile with the configure Makefile [R. Laboissiere]:
  - ./configure
  - make

Compiling the source distribution

  The gzip file, qhull-src.tgz, contains documentation and source files for
  qhull and rbox.  
  
  To unpack the gzip file
  - tar zxf qhull-src.tgz
  - cd qhull
  
  Compiling with Makefile (i.e., Makefile.txt)   
  - cd src
  - in Makefile, check the CC, CCOPTS1, PRINTMAN, and PRINTC defines
      - the defaults are gcc and enscript
      - CCOPTS1 should include the ANSI flag.  It defines __STDC__
  - in user.h, check the definitions of qh_SECticks and qh_CPUclock.
      - use '#define qh_CLOCKtype 2' for timing runs longer than 1 hour
  - type: make 
      - this builds: qhull qconvex qdelaunay qhalf qvoronoi rbox libqhull.a
  - type: make doc
      - this prints the man page
      - See also qhull/html/index.htm
  - if your compiler reports many errors, it is probably not a ANSI C compiler
      - you will need to set the -ansi switch or find another compiler
  - if your compiler warns about missing prototypes for fprintf() etc.
      - this is ok, your compiler should have these in stdio.h
  - if your compiler warns about missing prototypes for memset() etc.
      - include memory.h in qhull_a.h
  - if your compiler is gcc-2.95.1, you need to set flag -fno-strict-aliasing.  
      - This flag is set by default for other versions [Karas, Krishnaswami]
  - if your compiler reports "global.c: storage size of 'qh_qh' isn't known"
      - delete the initializer "={0}" in global.c, stat.c and mem.c
  - if your compiler warns about "stat.c: improper initializer"
      - this is ok, the initializer is not used
  - if you have trouble building libqhull.a with 'ar'
      - try 'make -f Makefile.txt qhullx' 
  - if the code compiles, the qhull test case will automatically execute
  - if an error occurs, there's an incompatibility between machines
      - For gcc-2.95.1, you need to set flag -fno-strict-aliasing.
            It is set by default for other versions of gcc [Karas, Krishnaswami]
      - If you can, try a different compiler 
      - You can turn off the Qhull memory manager with qh_NOmem in mem.h
      - You can turn off compiler optimization (-O2 in Makefile)
      - If you find the source of the problem, please let us know
  - if you have Geomview (www.geomview.org)
       - try  'rbox 100 | qconvex G >a' and load 'a' into Geomview
       - run 'q_eg' for Geomview examples of Qhull output (see qh-eg.htm)
  - to install the programs and their man pages:
      - define MANDIR and BINDIR
      - type 'make install'

Compiling on Windows 95, 98, NT, 2000, XP

  Qhull compiles as a console application in Visual C++ 5.0 at warning 
  level 3.

  Visual C++ quickstart for qhull.exe only:
    - create a "Win32 console application" called "qhull"
        - add the following files:
            geom.c geom2.c global.c io.c mem.c merge.c poly.c poly2.c qhull.c
                qset.c stat.c unix.c user.c
    - create a "Win32 console application" called "rbox" 
        - add rbox.c

  Visual C++ quickstart for qhull library, qhull.exe, qconvex.exe, etc.
    - To simplify setting up lots of projects, 
        - create a temporary "Win32 console application" called "source"
        - add all .c files from .../src/...
        - In Tools::Options::Tab
          Set tab size to 8 and indent size to 2

    - create a "Win32 console application" called "rbox"
        - move rbox.c from "qhull source"
        - for Project:Settings..., Link
          you only need the default libraries
        - build the project

    - create a "Win32 static library" called "library"
        - move these files from "qhull source"
            geom.c geom2.c global.c io.c mem.c merge.c poly.c poly2.c qhull.c
                qset.c stat.c user.c
        - set the library file (use the same for debug and release)
        - build the project

    - create a "Win32 console application" called "qhull"
        - Move unix.c from "qhull source"
        - Add the library file created by "library"
        - Qhull does not use other libraries

    - create a "Win32 console application" called "qconvex"
        - Move qconvex.c from "qhull source"
        - Copy the library file from "qhull"

    - do the same for qdelaun.c, qhalf, qvoronoi.c, user_eg.c, user_eg2.c
        - delete "qhull sources" since it is no longer needed
        - use Project:Settings to make any changes
        - use batch build to rebuild everything
  
  Qhull compiles with Borland C++ 5.0 bcc32.  A Makefile is included.
  Execute 'make -f Mborland'.  If you use the Borland IDE, set the ANSI
  option in Options:Project:Compiler:Source:Language-compliance.
  
  Qhull compiles with Borland C++ 4.02 for Win32 and DOS Power Pack.  
  Use 'make -f Mborland -D_DPMI'.  Qhull 1.0 compiles with Borland 
  C++ 4.02.  For rbox 1.0, use "bcc32 -WX -w- -O2-e -erbox -lc rbox.c".  
  Use the same options for Qhull 1.0. [D. Zwick]
  
  Qhull compiles with Metrowerks C++ 1.7 with the ANSI option.

  If you turn on full warnings, the compiler will report a number of 
  unused variables, variables set but not used, and dead code.  These are
  intentional.  For example, variables may be initialized (unnecessarily)
  to prevent warnings about possible use of uninitialized variables.  

Compiling on the Power Macintosh

  Qhull compiles on the Power Macintosh with Metrowerk's C compiler.
  It uses the SIOUX interface to read point coordinates and return output.
  There is no graphical output.  For project files, see 'Compiling for
  Windows 95'.  Instead of using SIOUX, Qhull may be embedded within an 
  application.  

  Version 1 is available for Macintosh computers by download of qhull.sit.hqx
  It reads point coordinates from a standard file and returns output
  to a standard file.  There is no graphical output.


Compiling on other machines
 
  Some users have reported problems with compiling Qhull under Irix 5.1.  It
  compiles under other versions of Irix. 
  
  If you have troubles with the memory manager, you can turn it off by
  defining qh_NOmem in mem.h.

  You may compile Qhull with a C++ compiler.  


Distributed files

  README.txt           // instructions for installing Qhull 
  REGISTER.txt         // Qhull registration 
  COPYING.txt          // copyright notice 
  QHULL-GO.pif         // Windows icon for qhull-go.bat
  Announce.txt         // announcement 
  Changes.txt          // change history for Qhull and rbox 
  File_id.diz          // package descriptor
  index.htm            // Home page 
  html/qh-faq.htm      // Frequently asked questions
  html/qh-get.htm      // Download page
  html/index.htm       // Manual
  src/Makefile.txt     // Makefile for Unix or cygwin 'make' 
  src/Mborland         // Makefile for Borland C++/Win32
  src/Make-config.sh   // Create Debian configure and automake
 
src/      
  rbox consists of:
     rbox.exe          // Win32 executable (.zip only) 
     rbox.htm          // html manual 
     rbox.man          // Unix man page 
     rbox.txt
     rbox.c            // source program 
     
  qhull consists of:
     qhull.exe         // Win32 executables (.zip only) 
     qconvex.exe
     qdelaunay.exe
     qhalf.exe
     qvoronoi.exe
     qhull-go.bat      // DOS window
     qconvex.htm       // html manuals
     qdelaun.htm
     qdelau_f.htm        
     qhalf.htm
     qvoronoi.htm
     qvoron_f.htm
     qh-eg.htm
     qh-impre.htm
     qh-in.htm
     index.htm
     qh-opt*.htm
     qh-quick.htm
     qh--4d.gif,etc.   // images for manual 
     qhull.man         // Unix man page 
     qhull.txt
     q_eg              // shell script for Geomview examples
     q_egtest          // shell script for Geomview test examples
     q_test            // shell script to test qhull
  
  top-level source files:
     src/index.htm     // index to source files 
     qh-...htm         //   specific files
     user.h            // header file of user definable constants 
     qhull.h           // header file for qhull 
     unix.c            // Unix front end to qhull 
     qhull.c           // Quickhull algorithm with partitioning 
     user.c            // user re-definable functions 
     user_eg.c         // example of incorporating qhull into a user program 
     user_eg2.c        // more complex example 
     qhull_interface.cpp // call Qhull from C++

  other source files:
     qhull_a.h         // include file for *.c 
     geom.c            // geometric routines 
     geom2.c
     geom.h     
     global.c          // global variables 
     io.c              // input-output routines 
     io.h
     mem.c             // memory routines, this is stand-alone code 
     mem.h
     merge.c           // merging of non-convex facets 
     merge.h
     poly.c            // polyhedron routines 
     poly2.c
     poly.h 
     qset.c            // set routines, this only depends on mem.c 
     qset.h
     stat.c            // statistics 
     stat.h

Authors:

  C. Bradford Barber                    Hannu Huhdanpaa
  bradb@qhull.org                       hannu@qhull.org
  
                    The Geometry Center
                    University of Minnesota
  
  Qhull 1.0 and 2.0 were developed under NSF grants NSF/DMS-8920161 
  and NSF-CCR-91-15793 750-7504 at the Geometry Center and Harvard 
  University.  If you find Qhull useful, please let us know.
Revision:	1138
Committed:	Tue May 29 22:51:00 2007 UTC (19 years ago) by chuckv
Content type:	text/plain
File size:	12435 byte(s)
Log Message:	Addded QuickHull to cvs.
#	User	Rev	Content
1	chuckv	1138	Name
2
3			qhull, rbox 2003.1 2003/12/30
4
5			Convex hull, Delaunay triangulation, Voronoi diagrams, Halfspace intersection
6
7			Documentation:
8			html/index.htm
9
10			Available from:
11			<http://www.qhull.org>
12			<http://savannah.nongnu.org/projects/qhull>
13
14			Version 1 (simplicial only):
15			<http://www.qhull.org/download/qhull-1.0.tar.gz>
16			<http://www.qhull.org/download/qhull.sit.hqx>
17
18			News and a paper:
19			<http://www.qhull.org/news>
20			<http://citeseer.nj.nec.com/83502.html>
21
22			Purpose
23
24			Qhull is a general dimension convex hull program that reads a set
25			of points from stdin, and outputs the smallest convex set that contains
26			the points to stdout. It also generates Delaunay triangulations, Voronoi
27			diagrams, furthest-site Voronoi diagrams, and halfspace intersections
28			about a point.
29
30			Rbox is a useful tool in generating input for Qhull; it generates
31			hypercubes, diamonds, cones, circles, simplices, spirals,
32			lattices, and random points.
33
34			Qhull produces graphical output for Geomview. This helps with
35			understanding the output. <http://www.geomview.org>
36
37
38			Environment requirements
39
40			Qhull and rbox should run on all 32-bit and 64-bit computers. Use
41			an ANSI C or C++ compiler to compile the program. The software is
42			self-contained.
43
44			Qhull is copyrighted software. Please read COPYING.txt and REGISTER.txt
45			before using or distributing Qhull.
46
47			To cite Qhull, please use
48
49			Barber, C.B., Dobkin, D.P., and Huhdanpaa, H.T., "The Quickhull
50			algorithm for convex hulls," ACM Trans. on Mathematical Software,
51			22(4):469-483, Dec 1996, http://www.qhull.org.
52
53			To contribute to Qhull
54
55			Qhull is on Savannah at http://savannah.nongnu.org/projects/qhull/
56
57			Qhull on Windows 95, 98, ME, NT, 2000, XP
58
59			The zip file contains rbox.exe, qhull.exe, qconvex.exe, qdelaunay.exe,
60			qhalf.exe, qvoronoi.exe, documentation files, and source files.
61
62			To install Qhull:
63			- Unzip the files into a directory. You may use WinZip32 <www.hotfiles.com>
64			- Click on QHULL-GO
65
66			- In Windows 95, the DOS window needs improvement.
67			- Increase the size of the screen font to 8x12.
68			- If the text is too dim, fix the screen colors with shareware (e.g., crt.exe)
69			- If you use qhull a lot, consider using the Cygwin Unix shell (www.cygwin.com),
70
71			To learn about Qhull:
72			- Execute 'qconvex' for a synopsis and examples.
73			- Execute 'rbox 10 \| qconvex' to compute the convex hull of 10 random points.
74			- Execute 'rbox 10 \| qconvex i TO file' to write results to 'file'.
75			- If an error occurs, Windows 95 sends the error to stdout instead of stderr
76			- use 'TO xxx' to send normal output to xxx and error output to stdout
77			- Browse the documentation: qhull\html\index.htm
78
79			Compiling with cygwin on Windows NT, 2000, XP
80			- install cygwin [www.cygwin.com] with gcc, make, ar, and ln
81			- cd qhull/src
82			- make -f Makefile.txt
83
84			Qhull on Unix (Debian)
85
86			The gzip file, qhull.tar.gz, contains documentation and source files for
87			qhull and rbox. It should compile on all Unix systems, including Debian.
88			You may also use the source instructions below.
89
90			To unpack the gzip file
91			- tar zxf qhull.tar.gz
92			- cd qhull
93
94			Compile with the configure Makefile [R. Laboissiere]:
95			- ./configure
96			- make
97
98			Compiling the source distribution
99
100			The gzip file, qhull-src.tgz, contains documentation and source files for
101			qhull and rbox.
102
103			To unpack the gzip file
104			- tar zxf qhull-src.tgz
105			- cd qhull
106
107			Compiling with Makefile (i.e., Makefile.txt)
108			- cd src
109			- in Makefile, check the CC, CCOPTS1, PRINTMAN, and PRINTC defines
110			- the defaults are gcc and enscript
111			- CCOPTS1 should include the ANSI flag. It defines __STDC__
112			- in user.h, check the definitions of qh_SECticks and qh_CPUclock.
113			- use '#define qh_CLOCKtype 2' for timing runs longer than 1 hour
114			- type: make
115			- this builds: qhull qconvex qdelaunay qhalf qvoronoi rbox libqhull.a
116			- type: make doc
117			- this prints the man page
118			- See also qhull/html/index.htm
119			- if your compiler reports many errors, it is probably not a ANSI C compiler
120			- you will need to set the -ansi switch or find another compiler
121			- if your compiler warns about missing prototypes for fprintf() etc.
122			- this is ok, your compiler should have these in stdio.h
123			- if your compiler warns about missing prototypes for memset() etc.
124			- include memory.h in qhull_a.h
125			- if your compiler is gcc-2.95.1, you need to set flag -fno-strict-aliasing.
126			- This flag is set by default for other versions [Karas, Krishnaswami]
127			- if your compiler reports "global.c: storage size of 'qh_qh' isn't known"
128			- delete the initializer "={0}" in global.c, stat.c and mem.c
129			- if your compiler warns about "stat.c: improper initializer"
130			- this is ok, the initializer is not used
131			- if you have trouble building libqhull.a with 'ar'
132			- try 'make -f Makefile.txt qhullx'
133			- if the code compiles, the qhull test case will automatically execute
134			- if an error occurs, there's an incompatibility between machines
135			- For gcc-2.95.1, you need to set flag -fno-strict-aliasing.
136			It is set by default for other versions of gcc [Karas, Krishnaswami]
137			- If you can, try a different compiler
138			- You can turn off the Qhull memory manager with qh_NOmem in mem.h
139			- You can turn off compiler optimization (-O2 in Makefile)
140			- If you find the source of the problem, please let us know
141			- if you have Geomview (www.geomview.org)
142			- try 'rbox 100 \| qconvex G >a' and load 'a' into Geomview
143			- run 'q_eg' for Geomview examples of Qhull output (see qh-eg.htm)
144			- to install the programs and their man pages:
145			- define MANDIR and BINDIR
146			- type 'make install'
147
148			Compiling on Windows 95, 98, NT, 2000, XP
149
150			Qhull compiles as a console application in Visual C++ 5.0 at warning
151			level 3.
152
153			Visual C++ quickstart for qhull.exe only:
154			- create a "Win32 console application" called "qhull"
155			- add the following files:
156			geom.c geom2.c global.c io.c mem.c merge.c poly.c poly2.c qhull.c
157			qset.c stat.c unix.c user.c
158			- create a "Win32 console application" called "rbox"
159			- add rbox.c
160
161			Visual C++ quickstart for qhull library, qhull.exe, qconvex.exe, etc.
162			- To simplify setting up lots of projects,
163			- create a temporary "Win32 console application" called "source"
164			- add all .c files from .../src/...
165			- In Tools::Options::Tab
166			Set tab size to 8 and indent size to 2
167
168			- create a "Win32 console application" called "rbox"
169			- move rbox.c from "qhull source"
170			- for Project:Settings..., Link
171			you only need the default libraries
172			- build the project
173
174			- create a "Win32 static library" called "library"
175			- move these files from "qhull source"
176			geom.c geom2.c global.c io.c mem.c merge.c poly.c poly2.c qhull.c
177			qset.c stat.c user.c
178			- set the library file (use the same for debug and release)
179			- build the project
180
181			- create a "Win32 console application" called "qhull"
182			- Move unix.c from "qhull source"
183			- Add the library file created by "library"
184			- Qhull does not use other libraries
185
186			- create a "Win32 console application" called "qconvex"
187			- Move qconvex.c from "qhull source"
188			- Copy the library file from "qhull"
189
190			- do the same for qdelaun.c, qhalf, qvoronoi.c, user_eg.c, user_eg2.c
191			- delete "qhull sources" since it is no longer needed
192			- use Project:Settings to make any changes
193			- use batch build to rebuild everything
194
195			Qhull compiles with Borland C++ 5.0 bcc32. A Makefile is included.
196			Execute 'make -f Mborland'. If you use the Borland IDE, set the ANSI
197			option in Options:Project:Compiler:Source:Language-compliance.
198
199			Qhull compiles with Borland C++ 4.02 for Win32 and DOS Power Pack.
200			Use 'make -f Mborland -D_DPMI'. Qhull 1.0 compiles with Borland
201			C++ 4.02. For rbox 1.0, use "bcc32 -WX -w- -O2-e -erbox -lc rbox.c".
202			Use the same options for Qhull 1.0. [D. Zwick]
203
204			Qhull compiles with Metrowerks C++ 1.7 with the ANSI option.
205
206			If you turn on full warnings, the compiler will report a number of
207			unused variables, variables set but not used, and dead code. These are
208			intentional. For example, variables may be initialized (unnecessarily)
209			to prevent warnings about possible use of uninitialized variables.
210
211			Compiling on the Power Macintosh
212
213			Qhull compiles on the Power Macintosh with Metrowerk's C compiler.
214			It uses the SIOUX interface to read point coordinates and return output.
215			There is no graphical output. For project files, see 'Compiling for
216			Windows 95'. Instead of using SIOUX, Qhull may be embedded within an
217			application.
218
219			Version 1 is available for Macintosh computers by download of qhull.sit.hqx
220			It reads point coordinates from a standard file and returns output
221			to a standard file. There is no graphical output.
222
223
224			Compiling on other machines
225
226			Some users have reported problems with compiling Qhull under Irix 5.1. It
227			compiles under other versions of Irix.
228
229			If you have troubles with the memory manager, you can turn it off by
230			defining qh_NOmem in mem.h.
231
232			You may compile Qhull with a C++ compiler.
233
234
235			Distributed files
236
237			README.txt // instructions for installing Qhull
238			REGISTER.txt // Qhull registration
239			COPYING.txt // copyright notice
240			QHULL-GO.pif // Windows icon for qhull-go.bat
241			Announce.txt // announcement
242			Changes.txt // change history for Qhull and rbox
243			File_id.diz // package descriptor
244			index.htm // Home page
245			html/qh-faq.htm // Frequently asked questions
246			html/qh-get.htm // Download page
247			html/index.htm // Manual
248			src/Makefile.txt // Makefile for Unix or cygwin 'make'
249			src/Mborland // Makefile for Borland C++/Win32
250			src/Make-config.sh // Create Debian configure and automake
251
252			src/
253			rbox consists of:
254			rbox.exe // Win32 executable (.zip only)
255			rbox.htm // html manual
256			rbox.man // Unix man page
257			rbox.txt
258			rbox.c // source program
259
260			qhull consists of:
261			qhull.exe // Win32 executables (.zip only)
262			qconvex.exe
263			qdelaunay.exe
264			qhalf.exe
265			qvoronoi.exe
266			qhull-go.bat // DOS window
267			qconvex.htm // html manuals
268			qdelaun.htm
269			qdelau_f.htm
270			qhalf.htm
271			qvoronoi.htm
272			qvoron_f.htm
273			qh-eg.htm
274			qh-impre.htm
275			qh-in.htm
276			index.htm
277			qh-opt*.htm
278			qh-quick.htm
279			qh--4d.gif,etc. // images for manual
280			qhull.man // Unix man page
281			qhull.txt
282			q_eg // shell script for Geomview examples
283			q_egtest // shell script for Geomview test examples
284			q_test // shell script to test qhull
285
286			top-level source files:
287			src/index.htm // index to source files
288			qh-...htm // specific files
289			user.h // header file of user definable constants
290			qhull.h // header file for qhull
291			unix.c // Unix front end to qhull
292			qhull.c // Quickhull algorithm with partitioning
293			user.c // user re-definable functions
294			user_eg.c // example of incorporating qhull into a user program
295			user_eg2.c // more complex example
296			qhull_interface.cpp // call Qhull from C++
297
298			other source files:
299			qhull_a.h // include file for *.c
300			geom.c // geometric routines
301			geom2.c
302			geom.h
303			global.c // global variables
304			io.c // input-output routines
305			io.h
306			mem.c // memory routines, this is stand-alone code
307			mem.h
308			merge.c // merging of non-convex facets
309			merge.h
310			poly.c // polyhedron routines
311			poly2.c
312			poly.h
313			qset.c // set routines, this only depends on mem.c
314			qset.h
315			stat.c // statistics
316			stat.h
317
318			Authors:
319
320			C. Bradford Barber Hannu Huhdanpaa
321			bradb@qhull.org hannu@qhull.org
322
323			The Geometry Center
324			University of Minnesota
325
326			Qhull 1.0 and 2.0 were developed under NSF grants NSF/DMS-8920161
327			and NSF-CCR-91-15793 750-7504 at the Geometry Center and Harvard
328			University. If you find Qhull useful, please let us know.