public VillagerNpc CreateVillager(int x, int y)
{
Location location = new Location { X = x, Y = y, Z = 0 };
//just skip to the next cell if the location is not empty
if (!_map.IsEmptyCell(location)) return null;
VillagerNpc villager = new VillagerNpc
{
Map = _map,
Engine = this,
Id = _characters.Any() ? _characters.Max(unit => unit.Id) + 1 : 0,
Logging = Logging
};
_map.Add(villager, location);
_characters.Add(villager);
//villager.EndMove(location);
villager.Ready(new MoveAction { Location = location });
villager.Ready(new IdleAction());
return villager;
}
public bool ProcessMove(CharacterBase unit, Location nextLeg)
{
Debug.WriteLineIf(unit.Id == 0, "Engine: ProcessMove");
if (_unitActionDict.ContainsKey(unit))
{
Debug.WriteLineIf(unit.Id == 0, "Engine: ProcessMove returning false");
return false;
}
return ProcessMoveInternal(unit, nextLeg);
}
/// <summary>
/// We need an internal ProcessMove method to avoid altering the original path.
/// </summary>
/// <param name="unit"></param>
/// <param name="nextLeg"></param>
/// <returns></returns>
private bool ProcessMoveInternal(CharacterBase unit, Location nextLeg)
{
//check that the map is empty at the desired location
if (!_map.ReserveIfEmpty(nextLeg, unit)) return false;
MoveAction moveAction = new MoveAction
{
Tick = _timeKeeper.Tick + unit.MovementSpeed,
Location = nextLeg
};
unit.BeginMove(nextLeg);
AddAction(unit, moveAction);
return true;
}
public bool ReserveIfEmpty(Location location, CharacterBase reservationOwner)
{
//TODO: move to some constants if will keep it (see below)
const int RESERVED = 1;
//TODO: maybe set the map id of the unit instead of a reservation code?
lock (_mapLockObject)
{
if (_map[location.X, location.Y] == 0 && 0 == Interlocked.CompareExchange(
ref _map[location.X, location.Y], RESERVED, 0))
{
//TODO: track the reservation owner
return true;
}
return false;
}
}
public void Remove(CharacterBase unit, Location location)
{
_map[location.X, location.Y] = 0;
}
public void Move(CharacterBase unit, Location oldLocation, Location newLocation)
{
_map[oldLocation.X, oldLocation.Y] = 0;
_map[newLocation.X, newLocation.Y] = _objectIdDictionary[unit].Id;
}
public bool IsEmptyCell(Location location)
{
if (location.X < 0 || location.Y < 0 || location.X > MAP_WIDTH - 1 || location.Y > MAP_HEIGHT - 1) return false;
return _map[location.X, location.Y] == 0;
}
public void Add(CharacterBase unit, Location location)
{
MapIdentifier identifier = _identifierPool.Get();
_objectIdDictionary.Add(unit, identifier);
_map[location.X, location.Y] = identifier.Id;
}