magnitude of Z vector - A positive value, if OAB makes a counter-clockwise turn, negative for clockwise turn, and zero if the points are collinear.
Returns the 2D cross product of OA and OB vectors
magnitude of Z vector - A positive value, if OAB makes a counter-clockwise turn, negative for clockwise turn, and zero if the points are collinear.
Returns the 2D cross product of OA and OB vectors