class PFNav:public robotinoNavigator{
    public:
        PFNav();
        void setPotentialField(potentialField field);	// set the internal potential field
        void spin();						// run the class.  continuously move toward lower potential
        void moveTowardTarget();				// take one step toward target
    
        potentialField navField;
    
        float movementGain;
        
    private:
};