On Sat, 05 Jun 1999 18:03:21 GMT, par### [at] mailfwicom (Ronald L.
Parker) wrote:

>It uses the difference between the distance to the closest point and
>the distance to the second-closest point, which is twice the distance
>from the edge equidistant between the two points.

or it would be, if only the component along the line between the point
were used.  As it is, it's a little more complicated than that but I
don't think I've ever been able to see the difference.  In any case,
it's roughly proportional to the distance from the edge.

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