private void BuildRoads()
{
var topology = new Topology(this);
var roads = new List <List <Vector2> > ();
var streets = new List <List <Vector2> > ();
foreach (var gate in Gates.ToList())
{
var endPoint = Market.Shape.Vertices.OrderBy(v => (gate - v).magnitude).First();
var street = topology.BuildPath(gate, endPoint, topology.Outer);
if (street != null)
{
//roads.Add(street);
streets.Add(street);
if (CityWall.Gates.Contains(gate))
{
var direction = GeometryHelpers.Scale(gate - Center, 100000);
var start = topology.Node2V.Values.OrderBy(v => (v - direction).magnitude).First();
var road = topology.BuildPath(start, gate, topology.Inner);
if (road == null)
{
CityWall.Gates.Remove(gate);
CityWall.Towers.Add(gate);
Gates.Remove(gate);
}
else
{
roads.Add(road);
}
}
}
}
if (!roads.Any())
{
throw new InvalidOperationException("No roads into the town");
}
Roads.AddRange(TidyUpRoads(roads));
Streets.AddRange(TidyUpRoads(streets));
foreach (var road in Roads)
{
var insideVertices = road.Where(rv => Patches.Where(p => p.Shape.ContainsPoint(rv)).All(p => p.WithinCity)).Except(Gates).ToList();
foreach (var insideVertex in insideVertices)
{
road.Remove(insideVertex);
}
}
}