bdy(3)                     Library Functions Manual                     bdy(3)

       bdy - boundary curve finder

       #include "bdy.h"

       Geom *Bdy(Geom *, float prec);

       Bdy() is a function which takes a geom as its argument.  The geom is
       then converted to a polylist, which is compressed (See plconsol(3).
       Bdy() then counts the number of edges in the polylist used once and
       only once, and returns a vector object containing these edges.  The
       precision, prec, is used to determine the maximum distance between
       vertices which may be considered identical.  If the vertices must have
       identical coordinates, this value should be set to 0.0.  It is
       generally desirable to set the value somewhat higher to allow for
       round-off error.

       The vector object is always black.

       The vector object is not a particularly compact representation of
       itself, since it contains many 2-vertex segments which could be
       combined into a longer polyline.

       Bdy() is part of the geomutil library; see geomutil(3) for information
       on how to link your program with this library.

       bdy(1), geomview(1), anytopl(3), geomutil(3)

       Celeste Fowler                          email:
       The Geometry Center                     phone:  (612) 626-8304
       1300 South Second Street
       Minneapolis, MN  55454

Geometry Center                  June 15, 1992                          bdy(3)