On Mon, Sep 10, 2012 at 1:01 PM, c. <carlo.defa...@gmail.com> wrote: > 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.
Hi, I would not modify the function, but use it together with inpolygon (in the core geomtry package). I guess this is what you want http://agora.octave.org/snippet/FRXH/ Let me know -- JuanPi Carbajal ----- "The bad economist pursues a small present good, which will be followed by a great evil to come, while the true economist pursues a great good to come, at the risk of a small present evil." - Frédéric Bastiat ----- http://ailab.ifi.uzh.ch/carbajal/ ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Octave-dev mailing list Octave-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/octave-dev
