On 28 May 2008, at 21:35, Richard Duivenvoorde wrote: > Richard Fairhurst wrote: >> Can anybody point me in the direction of an algorithm that will >> determine whether a closed way (polyline) is clockwise or anti- >> clockwise? >> >> cheers >> Richard >> >> _______________________________________________ >> dev mailing list >> [email protected] >> http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/dev > > Richard, > there is a good set of (explanations of) algorithms here: > > http://www.faqs.org/faqs/graphics/algorithms-faq/ > > There is no copy and paste code there, but the explanation how to do > it > in "Subject 2.07: How do I find the orientation of a simple polygon?" > can maybe help you further?
ugh - pointlessly complicated > > > Richard Duivenvoorde > > _______________________________________________ > dev mailing list > [email protected] > http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/dev > Best Steve _______________________________________________ dev mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/dev
