


bdy(1)              UNIX Programmer's Manual               bdy(1)



NAME
     bdy - boundary curve finder

SYNOPSIS
     bdy [precision]

DESCRIPTION
     Bdy is a filter used to find boundary curves in Geomview
     objects. The program reads a geomview object from standard
     output and prints the resultant vector object to standard
     output.  Bdy finds the segments of the vector by first con-
     verting the given object into a polylist (See anytooff(1)).
     Then, it finds all edges used once and only once in the
     polylist and combines these edges into a vector object.  The
     optional precision arguement specifies the maximum distance
     between vertices that are to be considered identical.  By
     default, it is set to 0.0, indicating that the vertices must
     be numerically identical.  It may sometimes be necessary to
     set it to a higher value to compensate for floating-point
     error.

     The vector object is always black.

BUGS
     The vector object is not a particularly compact representa-
     tion of itself, since it contains many 2-vertex segments
     which could be combined.

SEE ALSO
     geomview(1), anytooff(1), anytopl(3), bdy(3), offconsol(1),
     plconsol(3)

AUTHOR
     Celeste Fowler                email:    fowler@geom.umn.edu
     The Geometry Center           phone:  (612) 626-8304
     1300 South Second Street
     Minneapolis, MN  55454






















