winding number
winding number The number of times the sequence of points defining a polygon winds around a particular point. This value may be used to implement an efficient polygon inside/outside test: points for which the winding number is nonzero are defined as inside the boundary. The test gives a different result from the odd-even rule.
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Wind refers to any flow of air above Earth's surface in a roughly horizontal direction. A wind is always named according to the direction from w…
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winding number