[math] How to determine if a list of polygon points are in clockwise order?

A much computationally simpler method, if you already know a point inside the polygon:

  1. Choose any line segment from the original polygon, points and their coordinates in that order.

  2. Add a known "inside" point, and form a triangle.

  3. Calculate CW or CCW as suggested here with those three points.

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How to determine if a list of polygon points are in clockwise order?