// Return the 2D normal to the linesegment formed by the passed in points.
// The normal thus calculated should rotate anti-clockwise.
/*static*/ Vector Vector::Normal(Vector tail, Vector head)
{
Vector v = (head - tail).Unit();
// Return the 2D normal to the linesegment formed by the passed in points.
// The normal thus calculated should rotate anti-clockwise.
/*static*/ Vector Vector::Normal(Vector tail, Vector head)
{
Vector v = (head - tail).Unit();