/**
* Defines the position of a location within the map. Using this method, one
* location should be selected as reference position (<code>dist=0</code>
* and <code>dir=0</code>) and all the other location should be placed
* relative to it.
*
* @param loc
* location name
* @param dist
* distance to a reference position
* @param dir
* bearing (compass direction) in which the location is seen from
* the reference position
*/
public void setDistAndDirToRefLocation(String loc, double dist, int dir) {
Point2D coords = new Point2D(-Math.Sin(dir * Math.PI / 180.0) * dist,
Math.Cos(dir * Math.PI / 180.0) * dist);
links.addVertex(loc);
locationPositions.Add(loc, coords);
}
/**
* Returns the Euclidean distance between a specified point and this point.
*/
public double distance(Point2D pt)
{
double result = (pt.getX() - x) * (pt.getX() - x);
result += (pt.getY() - y) * (pt.getY() - y);
return Math.Sqrt(result);
}