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bdy.1
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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
input 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