1bdy(3gv)                                                              bdy(3gv)
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NAME

6       bdy - boundary curve finder
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SYNOPSIS

9       #include "bdy.h"
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11       Geom *Bdy(Geom *, float prec);
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DESCRIPTION

14       Bdy()  is  a  function which takes a geom as its argument.  The geom is
15       then converted to a polylist, which  is  compressed  (See  plconsol(3).
16       Bdy()  then  counts  the  number of edges in the polylist used once and
17       only once, and returns a vector object  containing  these  edges.   The
18       precision, prec, is used to determine the maximum distance between ver‐
19       tices which may be considered identical.  If  the  vertices  must  have
20       identical  coordinates,  this value should be set to 0.0.  It is gener‐
21       ally desirable to set the value somewhat higher to allow for  round-off
22       error.
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24       The vector object is always black.
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BUGS

27       The  vector  object  is  not  a  particularly compact representation of
28       itself, since it contains many 2-vertex segments which  could  be  com‐
29       bined into a longer polyline.
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LINKING

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

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

39       Celeste Fowler
40       The Geometry Center
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45Geometry Center                  June 15, 1992                        bdy(3gv)