    point.vectorAngle(p)

Computes the angle (in degrees) between the line passing through the point (0,0) and this point and the line passing through the point (0,0) and point `p`. The function returns a value between 0 and 180 degrees when the angle is counterclockwise, and a value between 180 and 360 degrees when the angle is clockwise. The function returns NaN if called from point (0,0) or if `p` is (0,0).