public RealLineSegment(double k, double q, RealCoordinate start, RealCoordinate end)
 {
     this.k     = k;
     this.q     = q;
     this.start = start;
     this.end   = end;
 }
 public RectangularObstacle(int length, int width, RealCoordinate location) : base(ObstacleType.Rectangle)
 {
     this.length  = length;
     this.width   = width;
     realLocation = location;
 }