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Name |
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|
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qhull, rbox 2003.1 2003/12/30 |
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|
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Convex hull, Delaunay triangulation, Voronoi diagrams, Halfspace intersection |
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|
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Documentation: |
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html/index.htm |
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|
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Available from: |
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<http://www.qhull.org> |
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<http://savannah.nongnu.org/projects/qhull> |
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|
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Version 1 (simplicial only): |
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<http://www.qhull.org/download/qhull-1.0.tar.gz> |
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<http://www.qhull.org/download/qhull.sit.hqx> |
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|
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News and a paper: |
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<http://www.qhull.org/news> |
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<http://citeseer.nj.nec.com/83502.html> |
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|
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Purpose |
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|
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Qhull is a general dimension convex hull program that reads a set |
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of points from stdin, and outputs the smallest convex set that contains |
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the points to stdout. It also generates Delaunay triangulations, Voronoi |
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diagrams, furthest-site Voronoi diagrams, and halfspace intersections |
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about a point. |
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|
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Rbox is a useful tool in generating input for Qhull; it generates |
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hypercubes, diamonds, cones, circles, simplices, spirals, |
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lattices, and random points. |
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|
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Qhull produces graphical output for Geomview. This helps with |
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understanding the output. <http://www.geomview.org> |
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|
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|
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Environment requirements |
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|
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Qhull and rbox should run on all 32-bit and 64-bit computers. Use |
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an ANSI C or C++ compiler to compile the program. The software is |
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self-contained. |
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|
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Qhull is copyrighted software. Please read COPYING.txt and REGISTER.txt |
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before using or distributing Qhull. |
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|
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To cite Qhull, please use |
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|
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Barber, C.B., Dobkin, D.P., and Huhdanpaa, H.T., "The Quickhull |
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algorithm for convex hulls," ACM Trans. on Mathematical Software, |
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22(4):469-483, Dec 1996, http://www.qhull.org. |
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|
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To contribute to Qhull |
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|
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Qhull is on Savannah at http://savannah.nongnu.org/projects/qhull/ |
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|
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Qhull on Windows 95, 98, ME, NT, 2000, XP |
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|
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The zip file contains rbox.exe, qhull.exe, qconvex.exe, qdelaunay.exe, |
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qhalf.exe, qvoronoi.exe, documentation files, and source files. |
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|
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To install Qhull: |
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- Unzip the files into a directory. You may use WinZip32 <www.hotfiles.com> |
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- Click on QHULL-GO |
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|
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- In Windows 95, the DOS window needs improvement. |
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- Increase the size of the screen font to 8x12. |
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- If the text is too dim, fix the screen colors with shareware (e.g., crt.exe) |
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- If you use qhull a lot, consider using the Cygwin Unix shell (www.cygwin.com), |
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|
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To learn about Qhull: |
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- Execute 'qconvex' for a synopsis and examples. |
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- Execute 'rbox 10 | qconvex' to compute the convex hull of 10 random points. |
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- Execute 'rbox 10 | qconvex i TO file' to write results to 'file'. |
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- If an error occurs, Windows 95 sends the error to stdout instead of stderr |
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- use 'TO xxx' to send normal output to xxx and error output to stdout |
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- Browse the documentation: qhull\html\index.htm |
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|
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Compiling with cygwin on Windows NT, 2000, XP |
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- install cygwin [www.cygwin.com] with gcc, make, ar, and ln |
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- cd qhull/src |
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- make -f Makefile.txt |
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|
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Qhull on Unix (Debian) |
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|
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The gzip file, qhull.tar.gz, contains documentation and source files for |
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qhull and rbox. It should compile on all Unix systems, including Debian. |
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You may also use the source instructions below. |
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|
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To unpack the gzip file |
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- tar zxf qhull.tar.gz |
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- cd qhull |
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|
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Compile with the configure Makefile [R. Laboissiere]: |
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- ./configure |
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- make |
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|
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Compiling the source distribution |
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|
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The gzip file, qhull-src.tgz, contains documentation and source files for |
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qhull and rbox. |
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|
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To unpack the gzip file |
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- tar zxf qhull-src.tgz |
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- cd qhull |
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|
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Compiling with Makefile (i.e., Makefile.txt) |
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- cd src |
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- in Makefile, check the CC, CCOPTS1, PRINTMAN, and PRINTC defines |
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- the defaults are gcc and enscript |
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- CCOPTS1 should include the ANSI flag. It defines __STDC__ |
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- in user.h, check the definitions of qh_SECticks and qh_CPUclock. |
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- use '#define qh_CLOCKtype 2' for timing runs longer than 1 hour |
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- type: make |
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- this builds: qhull qconvex qdelaunay qhalf qvoronoi rbox libqhull.a |
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- type: make doc |
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- this prints the man page |
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- See also qhull/html/index.htm |
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- if your compiler reports many errors, it is probably not a ANSI C compiler |
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- you will need to set the -ansi switch or find another compiler |
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- if your compiler warns about missing prototypes for fprintf() etc. |
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- this is ok, your compiler should have these in stdio.h |
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- if your compiler warns about missing prototypes for memset() etc. |
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- include memory.h in qhull_a.h |
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- if your compiler is gcc-2.95.1, you need to set flag -fno-strict-aliasing. |
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- This flag is set by default for other versions [Karas, Krishnaswami] |
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- if your compiler reports "global.c: storage size of 'qh_qh' isn't known" |
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- delete the initializer "={0}" in global.c, stat.c and mem.c |
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- if your compiler warns about "stat.c: improper initializer" |
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- this is ok, the initializer is not used |
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- if you have trouble building libqhull.a with 'ar' |
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- try 'make -f Makefile.txt qhullx' |
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- if the code compiles, the qhull test case will automatically execute |
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- if an error occurs, there's an incompatibility between machines |
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- For gcc-2.95.1, you need to set flag -fno-strict-aliasing. |
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It is set by default for other versions of gcc [Karas, Krishnaswami] |
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- If you can, try a different compiler |
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- You can turn off the Qhull memory manager with qh_NOmem in mem.h |
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- You can turn off compiler optimization (-O2 in Makefile) |
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- If you find the source of the problem, please let us know |
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- if you have Geomview (www.geomview.org) |
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- try 'rbox 100 | qconvex G >a' and load 'a' into Geomview |
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- run 'q_eg' for Geomview examples of Qhull output (see qh-eg.htm) |
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- to install the programs and their man pages: |
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- define MANDIR and BINDIR |
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- type 'make install' |
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|
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Compiling on Windows 95, 98, NT, 2000, XP |
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|
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Qhull compiles as a console application in Visual C++ 5.0 at warning |
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level 3. |
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|
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Visual C++ quickstart for qhull.exe only: |
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- create a "Win32 console application" called "qhull" |
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- add the following files: |
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geom.c geom2.c global.c io.c mem.c merge.c poly.c poly2.c qhull.c |
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qset.c stat.c unix.c user.c |
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- create a "Win32 console application" called "rbox" |
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- add rbox.c |
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|
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Visual C++ quickstart for qhull library, qhull.exe, qconvex.exe, etc. |
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- To simplify setting up lots of projects, |
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- create a temporary "Win32 console application" called "source" |
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- add all .c files from .../src/... |
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- In Tools::Options::Tab |
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Set tab size to 8 and indent size to 2 |
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|
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- create a "Win32 console application" called "rbox" |
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- move rbox.c from "qhull source" |
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- for Project:Settings..., Link |
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you only need the default libraries |
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- build the project |
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|
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- create a "Win32 static library" called "library" |
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- move these files from "qhull source" |
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geom.c geom2.c global.c io.c mem.c merge.c poly.c poly2.c qhull.c |
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qset.c stat.c user.c |
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- set the library file (use the same for debug and release) |
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- build the project |
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|
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- create a "Win32 console application" called "qhull" |
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- Move unix.c from "qhull source" |
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- Add the library file created by "library" |
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- Qhull does not use other libraries |
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|
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- create a "Win32 console application" called "qconvex" |
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- Move qconvex.c from "qhull source" |
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- Copy the library file from "qhull" |
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|
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- do the same for qdelaun.c, qhalf, qvoronoi.c, user_eg.c, user_eg2.c |
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- delete "qhull sources" since it is no longer needed |
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- use Project:Settings to make any changes |
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- use batch build to rebuild everything |
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|
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Qhull compiles with Borland C++ 5.0 bcc32. A Makefile is included. |
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Execute 'make -f Mborland'. If you use the Borland IDE, set the ANSI |
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option in Options:Project:Compiler:Source:Language-compliance. |
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|
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Qhull compiles with Borland C++ 4.02 for Win32 and DOS Power Pack. |
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Use 'make -f Mborland -D_DPMI'. Qhull 1.0 compiles with Borland |
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C++ 4.02. For rbox 1.0, use "bcc32 -WX -w- -O2-e -erbox -lc rbox.c". |
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Use the same options for Qhull 1.0. [D. Zwick] |
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|
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Qhull compiles with Metrowerks C++ 1.7 with the ANSI option. |
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|
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If you turn on full warnings, the compiler will report a number of |
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unused variables, variables set but not used, and dead code. These are |
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intentional. For example, variables may be initialized (unnecessarily) |
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to prevent warnings about possible use of uninitialized variables. |
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|
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Compiling on the Power Macintosh |
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|
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Qhull compiles on the Power Macintosh with Metrowerk's C compiler. |
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It uses the SIOUX interface to read point coordinates and return output. |
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There is no graphical output. For project files, see 'Compiling for |
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Windows 95'. Instead of using SIOUX, Qhull may be embedded within an |
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application. |
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|
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Version 1 is available for Macintosh computers by download of qhull.sit.hqx |
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It reads point coordinates from a standard file and returns output |
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to a standard file. There is no graphical output. |
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|
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|
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Compiling on other machines |
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|
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Some users have reported problems with compiling Qhull under Irix 5.1. It |
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compiles under other versions of Irix. |
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|
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If you have troubles with the memory manager, you can turn it off by |
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defining qh_NOmem in mem.h. |
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|
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You may compile Qhull with a C++ compiler. |
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|
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|
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Distributed files |
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|
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README.txt // instructions for installing Qhull |
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REGISTER.txt // Qhull registration |
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COPYING.txt // copyright notice |
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QHULL-GO.pif // Windows icon for qhull-go.bat |
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Announce.txt // announcement |
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Changes.txt // change history for Qhull and rbox |
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File_id.diz // package descriptor |
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index.htm // Home page |
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html/qh-faq.htm // Frequently asked questions |
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html/qh-get.htm // Download page |
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html/index.htm // Manual |
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src/Makefile.txt // Makefile for Unix or cygwin 'make' |
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src/Mborland // Makefile for Borland C++/Win32 |
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src/Make-config.sh // Create Debian configure and automake |
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|
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src/ |
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rbox consists of: |
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rbox.exe // Win32 executable (.zip only) |
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rbox.htm // html manual |
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rbox.man // Unix man page |
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rbox.txt |
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rbox.c // source program |
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|
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qhull consists of: |
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qhull.exe // Win32 executables (.zip only) |
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qconvex.exe |
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qdelaunay.exe |
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qhalf.exe |
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qvoronoi.exe |
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qhull-go.bat // DOS window |
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qconvex.htm // html manuals |
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qdelaun.htm |
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qdelau_f.htm |
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qhalf.htm |
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qvoronoi.htm |
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qvoron_f.htm |
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qh-eg.htm |
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qh-impre.htm |
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qh-in.htm |
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index.htm |
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qh-opt*.htm |
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qh-quick.htm |
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qh--4d.gif,etc. // images for manual |
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qhull.man // Unix man page |
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qhull.txt |
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q_eg // shell script for Geomview examples |
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q_egtest // shell script for Geomview test examples |
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q_test // shell script to test qhull |
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|
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top-level source files: |
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src/index.htm // index to source files |
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qh-...htm // specific files |
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user.h // header file of user definable constants |
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qhull.h // header file for qhull |
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unix.c // Unix front end to qhull |
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qhull.c // Quickhull algorithm with partitioning |
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user.c // user re-definable functions |
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user_eg.c // example of incorporating qhull into a user program |
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user_eg2.c // more complex example |
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qhull_interface.cpp // call Qhull from C++ |
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|
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other source files: |
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qhull_a.h // include file for *.c |
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geom.c // geometric routines |
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geom2.c |
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geom.h |
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global.c // global variables |
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io.c // input-output routines |
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io.h |
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mem.c // memory routines, this is stand-alone code |
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mem.h |
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merge.c // merging of non-convex facets |
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merge.h |
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poly.c // polyhedron routines |
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poly2.c |
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poly.h |
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qset.c // set routines, this only depends on mem.c |
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qset.h |
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stat.c // statistics |
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stat.h |
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|
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Authors: |
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|
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C. Bradford Barber Hannu Huhdanpaa |
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bradb@qhull.org hannu@qhull.org |
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|
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The Geometry Center |
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University of Minnesota |
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|
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Qhull 1.0 and 2.0 were developed under NSF grants NSF/DMS-8920161 |
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and NSF-CCR-91-15793 750-7504 at the Geometry Center and Harvard |
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University. If you find Qhull useful, please let us know. |
