From: c. <car...@gm...> - 2012-09-10 11:01:40
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Hi, I need to compute the "signed distance" of a point P from a polygon Q, i.e., the distance of P from the polyline including Q with a "+" sign if the point is inside the polygon and a "-" sign if it is outside. I see "distancePointPolygon" in the geometry package computes the distance but always returns a positive number. Is there already a function to do what I need? If not, any idea where I can look-up the algorithm to modify "distancePointPolygon" according to my needs? Thanks, c. |