Dear, Everyone who needs SEGVOR 

    I am very pleased to know that you are interested in my SEGVOR, 
a fortran program for constructing the Voronoi diagram of line segments.
I can send you a manual and sources files by airmail and e-mail. 

    Of course e-mail is quicker and easier, but the only problem is 
their size. Svsource (187278 bytes) is the uuencoded compressed tarfile 
of all source and manual files. You can see in the manual some notes 
on what users should do. I can send by e-mail svsource with the way 
to get back sources and manual as long as there are no narrow channel 
between you and me such as phone lines or so.

    I can also send by airmail all source and manual files in a floppy 
disk with a printed manual. The default is a 2DD floppy disk (720KB) 
and all files are uncompressed.

    So far, anonymous ftp is not available.

    I hope I can contribute your research by SEGVOR.


    There are some remarks on the latest version of segvor:

1. Segvor still has quite many switches and messages for debugging, 
which may irritate users. It is an "beta"-version.

2. Segvor guarantees Voronoi diagram as planar graphs under any errors of 
floating point number calculation. It never fails. 

3. Segvor requires completely separated segments as inputs, which means 
a set of polygons are NOT allowed as an input. A program called PLVOR 
will be available which allows an input set of points, (separated) 
segments, segment-chains and polygons. (The format of inputs file will be 
changed.)

4. Segvor can treat inputs of at most about 10000 segments. (Users can 
extend the maximum number of input segments.)

Sincerely.

---------------------------
Toshiyuki Imai,
                                           address:
 Research Assistant                         Hongo 7-3-1, Bunkyo-ku,
 Department of Mathematical Engineering     Tokyo 113 Japan
 and Information Physics                    
 Faculty of Engineering                    e-mail:
 University of Tokyo                        imai@simplex.t.u-tokyo.ac.jp