private IEnumerable <SolidRouteState> GenerateSplitterStates(Func <Searchspace, IPhysicalBuilding, double> costFunction, Building splitter)
{
var offsets = new BuildingRotation[] {
BuildingRotation.West,
BuildingRotation.North,
BuildingRotation.West,
BuildingRotation.North,
};
var offsetDir = offsets[(int)Direction];
Vector2 nextpos = _position + (_transportState == RoutingCoordinate.CoordinateType.Belt ? _direction.ToVector() : Vector2.Zero);
var endPoint1 = nextpos + offsetDir.ToVector();
var endPoint2 = nextpos - offsetDir.ToVector();
var target = FlowBuilding.Item.Item;
var dir = Direction;
var matches1 = Space.CalculateCollisions(endPoint1).OfType <Belt>().Where((b) => b.Item.Item == target && b.Rotation == dir);
var matches2 = Space.CalculateCollisions(endPoint2).OfType <Belt>().Where((b) => b.Item.Item == target && b.Rotation == dir);
if (matches1.Any())
{
var building = new Splitter(FlowBuilding.Item, splitter, endPoint1, Direction);
building.Previous.Add(Building);
yield return(new SolidRouteState(building, _cost + costFunction(_space, building), endPoint1, _space.AddRoute(building), RoutingCoordinate.CoordinateType.Splitter));
}
if (matches2.Any())
{
var building = new Splitter(FlowBuilding.Item, splitter, nextpos, Direction);
building.Previous.Add(Building);
yield return(new SolidRouteState(building, _cost + costFunction(_space, building), endPoint2, _space.AddRoute(building), RoutingCoordinate.CoordinateType.Splitter));
}
}