On Wed, May 28, 2008 at 10:26 PM, Richard Fairhurst <[EMAIL PROTECTED]> wrote:
> Can anybody point me in the direction of an algorithm that will > determine whether a closed way (polyline) is clockwise or anti- > clockwise? > Take a look at this: http://geometryalgorithms.com/Archive/algorithm_0101/algorithm_0101.htm#orientation2D_polygon() Regards, Quico
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