/**
* note that ADD returns a new object, this remains constant
*
* @param delta the offset to add to this point
* @return a new point
*/
public final WorldLocation add(final WorldVector delta) {
// check we have our model
if (_model == null) {
_model = new MWC.Algorithms.EarthModels.FlatEarth();
}
// do the calculation with our current model
// do we have a range?
final WorldLocation res;
if ((delta.getRange() == 0) && (delta.getDepth() == 0)) {
res = new WorldLocation(this);
} else {
res = new WorldLocation(_model.add(this, delta));
}
// and return the resutls
return res;
}
