protected List <Droid> visitNeighbors(Droid droid)
{
var neighbors = new List <Droid>();
var north = new Point(droid.loc.x, droid.loc.y + 1);
var south = new Point(droid.loc.x, droid.loc.y - 1);
var east = new Point(droid.loc.x + 1, droid.loc.y);
var west = new Point(droid.loc.x - 1, droid.loc.y);
visit(neighbors, droid, north, Direction.North);
visit(neighbors, droid, south, Direction.South);
visit(neighbors, droid, east, Direction.East);
visit(neighbors, droid, west, Direction.West);
return(neighbors);
}
protected void visit(List <Droid> neighbors, Droid droid, Point point, Direction dir)
{
if (visited.ContainsKey(point))
{
return;
}
var copy = new Droid(droid);
var result = copy.move(dir);
visited[point] = result;
if (result == Status.System)
{
oxygenSystem = point;
}
if (result == Status.Empty)
{
neighbors.Add(copy);
}
}
public Droid(Droid copy)
{
this.machine = new Machine(copy.machine, this);
this.loc = new Point(copy.loc.x, copy.loc.y);
}
