bdy(3) Geometry Center (June 15, 1992) bdy(3)
NAME
bdy - boundary curve finder
SYNOPSIS
#include "bdy.h"
Geom *Bdy(Geom *, float prec);
DESCRIPTION
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.
BUGS
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.
LINKING
Bdy() is part of the geomutil library; see geomutil(3) for
information on how to link your program with this library.
SEE ALSO
bdy(1), geomview(1), anytopl(3), geomutil(3)
AUTHOR
Celeste Fowler email: fowler@geom.umn.edu
The Geometry Center phone: (612) 626-8304
1300 South Second Street
Minneapolis, MN 55454
Page 1 (printed 12/22/98)