void getInicPoint(double& x, double& y, double& z);
void getFinalPoint(double& x, double& y, double& z);
+ void getCenter(double& x, double& y, double& z);
virtual void setInicPoint(double& x, double& y, double& z);
virtual void setFinalPoint(double& x, double& y, double& z);
void setState(int state);