virtual void move(Vector offset);
virtual void rotate(Vector center, double angle);
virtual void scale(Vector center, Vector factor);
virtual void mirror(Vector axisPoint1, Vector axisPoint2);
virtual void moveRef(const Vector & ref, const Vector & offset);
virtual void move(Vector offset);
virtual void rotate(Vector center, double angle);
virtual void scale(Vector center, Vector factor);
virtual void mirror(Vector axisPoint1, Vector axisPoint2);
virtual void moveRef(const Vector & ref, const Vector & offset);