algorithm
algorithm to find if closed path is rotating in right or left direction(finding right hande rule direction of closed loop)
A very simple mathmatical method exist to solve this problem. https://mathworld.wolfram.com/PolygonArea.html here is an interactive example: https://demonstrations.wolfram.com/SignedAreaOfAPolygon by calculating the signed area of a polygon, one can easily determine if a 2D directed path is rotating in the right or left direction.