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bdy(1gv) bdy(1gv)


bdy - boundary curve finder


bdy [precision]


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 converting 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.


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


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


Celeste Fowler
The Geometry Center
June 12 1992 Geometry Center