anchor.diff:    double minMagnitude = 0.0;
     double maxMagnitude = 0.0;
     
  -  Vector2 direction = new Vector2(1.0, 0.0);
  +  Vector2 direction = new Vector2(0.0, 0.0);
     
     bool limitMagnitude = true;
     
  
positive.code:     magnitude = magnitude > maxMagnitude ? maxMagnitude : magnitude;
    }
    
    String toString() => "mag: ${magnitude.toStringAsFixed(2)}, dir: $direction, min/max:(${minMagnitude.toStringAsFixed(2)}, ${maxMagnitude.toStringAsFixed(2)})";
    
  }
negative.code:     magnitude = speed;
      direction.setValues(x, y);
    }
  
    set velocity(Velocity velocity) {
      magnitude = velocity.magnitude;
      minMagnitude = velocity.minMagnitude;
      maxMagnitude = velocity.maxMagnitude;
      
      direction.setFrom(velocity.direction);
    }
  
  
    void setSpeedRange(double min, double max) {
      minMagnitude = min;
      maxMagnitude = max;    
  