Polygon vertices convexity
MATLAB training program (polygon vertices convexity) after generated simple polygons, polygon vertices convexity sometimes need to judge. First point and the adjacent point of two vectors to be processed to calculate the cross product of two vectors, positive and negative convexity can be judged based on the results obtained. Result is negative for concave vertices, is positive for convex vertices. Concave vertex is represented by o, convex vertex is represented by *.
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