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bdy(3gv)							      bdy(3gv)

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 ver-
       tices which may be considered identical.	 If  the  vertices  must  have
       identical  coordinates,	this value should be set to 0.0.  It is	gener-
       ally 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 it-
       self, 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
       The Geometry Center

Geometry Center			 June 15, 1992			      bdy(3gv)

NAME | SYNOPSIS | DESCRIPTION | BUGS | LINKING | SEE ALSO | AUTHOR

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