/// <summary>
/// Try to move the given loc to a new block.
/// </summary>
/// <returns>True if the loc has moved, false if there are no routes available.</returns>
private bool MoveLoc(FutureAlternativeSet genSet, ILocState loc)
{
// Get possible routes
var currentBlock = state.GetCurrentBlock(loc);
var currentBlockEnterSide = state.GetCurrentBlockEnterSide(loc);
var locDirection = currentBlockEnterSide.Invert();
var avoidDirectionChanges = (loc.ChangeDirection == ChangeDirection.Avoid);
var routeFromFromBlock = state.RailwayState.GetAllPossibleNonClosedRoutesFromBlock(currentBlock);
var routeOptions = routeFromFromBlock.Select(x => state.IsAvailableFor(x, loc, locDirection, avoidDirectionChanges, 0)).ToList();
var possibleRoutes = routeOptions.Where(x => x.IsPossible).Select(x => x.Route).ToList();
// If no routes, then return
if (!possibleRoutes.Any())
{
return(false);
}
if (possibleRoutes.Count > 1)
{
// Create alternate generations
foreach (var route in possibleRoutes.Skip(1))
{
var alternateState = new FutureRouteAvailabilityTester(state);
alternateState.TakeRoute(route, loc);
genSet.Add(new FutureAlternative(alternateState, generation));
}
}
// Take the first route
var firstRoute = possibleRoutes[0];
state.TakeRoute(firstRoute, loc);
return(true);
}
/// <summary>
/// Initialize from given state
/// </summary>
internal FutureRouteAvailabilityTester(FutureRouteAvailabilityTester source)
: base(source.railwayState)
{
foreach (var loc in railwayState.LocStates)
{
locStates[loc] = new LocState(source.locStates[loc]);
}
}
/// <summary>
/// Default ctor
/// </summary>
public FutureAlternative(FutureRouteAvailabilityTester state, int generation)
{
if (state == null)
{
throw new ArgumentNullException("state");
}
this.state = state;
this.generation = generation;
}
/// <summary>
/// Default ctor
/// </summary>
public FutureAlternativeSet(LiveRouteAvailabilityTester live, IRouteState route, ILocState loc)
{
this.testLoc = loc;
minGenerations = live.railwayState.BlockStates.Count;
var tester = new FutureRouteAvailabilityTester(live.railwayState);
tester.TakeRoute(route, loc);
alternatives.Add(new FutureAlternative(tester, 0));
autoLocs = live.railwayState.LocStates.Where(x => x.ControlledAutomatically.Actual && (x.CurrentBlock.Actual != null)).ToList();
}
