public SmallHouse(Orientation o, int X, int Z, Town t)
{
this._o = o;
if (o == Orientation.NORTH || 0 == Orientation.SOUTH)
_fp = new Footprint (8, 6);
else
_fp = new Footprint (6, 8);
this._x = X;
this._z = Z;
this._id = _idCount++;
if (!t.IsIDRegisted (2))
t.RegisterID (2);
}