Function closestPointToPath

closestPointToPath(c: Point, points: number[] | Point[], close: boolean): Point
Find a point that is closest to the path (open or closed).
Parameters
- c: Point
  The reference point C
- points: number[] | Point[]
  The points of the path P, which must not be empty
- close: boolean
  If true, the edge from the last to the first point of the path is tested
Returns Point
The closest point to C on the path P

See
https://en.wikipedia.org/wiki/Distance_from_a_point_to_a_line#Line_defined_by_two_points