That only works if the polygon in question is convex, otherwise local orientation says nothing about the polygon's orientation (unless you pick your locale cleverly, of course).

Take the example of a banana-shaped counterclockwise polygon: the interior section will have a "clockwise" orientation.

--
F o x t r o t U n i f o r m
Found a typo in this node? /msg me
The hell with paco, vote for Erudil!

In reply to Re(2): Clockwise or Counter-clockwise by FoxtrotUniform
in thread Clockwise or Counter-clockwise by stu96art

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