public bool CanMoveTo(int relX, int relY)
{
// TODO only referenced by land units, move to BaseUnitLand?
// Issue #93: fix problems with zone-of-control.
// refactored out for unit testability
ITile moveTarget = Map[X, Y][relX, relY];
if (moveTarget == null)
{
return(false);
}
// Issue #116: allow ship-borne units to move to any unoccupied tile
if (Map[X, Y].IsOcean)
{
return(!moveTarget.Units.Any(u => u.Owner != Owner));
}
var thisUnits = Map[X, Y].GetBorderTiles().SelectMany(t => t.Units);
var destUnits = moveTarget.GetBorderTiles().SelectMany(t => t.Units);
// Any enemy units around my position OR the target position?
bool thisBlocked = thisUnits.Any(u => u.Owner != Owner);
bool destBlocked = destUnits.Any(u => u.Owner != Owner);
bool destOK = moveTarget.Units.Any(u => u.Owner == Owner) || moveTarget.HasCity;
// Cannot move from a square adjacent to enemy unit to a square adjacent to enemy unit
// but _can_ move to square occupied by own units or to any undefended city square
return(destOK || !thisBlocked || !destBlocked);
}
public bool BuildIrrigation()
{
ITile tile = Map[X, Y];
if (tile.Irrigation)
{
// Tile already irrigated, ignore
return(false);
}
if ((tile is Forest) || (tile is Jungle) || (tile is Swamp))
{
BuildingIrrigation = 4;
MovesLeft = 0;
PartMoves = 0;
return(true);
}
else if ((tile.GetBorderTiles().Any(t => (t.X == X || t.Y == Y) && (t.City == null) && (t.IsOcean || t.Irrigation || (t is River)))) || (tile is River))
{
if (!tile.IsOcean && !(tile.Irrigation) && ((tile is Desert) || (tile is Grassland) || (tile is Hills) || (tile is Plains) || (tile is River)))
{
BuildingIrrigation = 3;
MovesLeft = 0;
PartMoves = 0;
return(true);
}
if (Human == Owner)
{
GameTask.Enqueue(Message.Error("-- Civilization Note --", TextFile.Instance.GetGameText("ERROR/NOIRR")));
}
return(false);
}
else
{
if (((tile is Desert) || (tile is Grassland) || (tile is Hills) || (tile is Plains) || (tile is River)) && tile.City == null)
{
if (Human == Owner)
{
GameTask.Enqueue(Message.Error("-- Civilization Note --", TextFile.Instance.GetGameText("ERROR/NOWATER")));
}
return(true);
}
if (Human == Owner)
{
GameTask.Enqueue(Message.Error("-- Civilization Note --", TextFile.Instance.GetGameText("ERROR/NOIRR")));
}
}
return(false);
}
public virtual bool MoveTo(int relX, int relY)
{
if (Movement != null)
{
return(false);
}
ITile moveTarget = Map[X, Y][relX, relY];
if (moveTarget == null)
{
return(false);
}
if (moveTarget.Units.Any(u => u.Owner != Owner))
{
if (Class == UnitClass.Land && Tile.IsOcean)
{
GameTask.Enqueue(Message.Error("-- Civilization Note --", TextFile.Instance.GetGameText($"ERROR/AMPHIB")));
return(false);
}
return(Confront(relX, relY));
}
if (Class == UnitClass.Land && !(this is Diplomat || this is Caravan) && !new ITile[] { Map[X, Y], moveTarget }.Any(t => t.IsOcean || t.City != null) && moveTarget.GetBorderTiles().SelectMany(t => t.Units).Any(u => u.Owner != Owner))
{
if (!moveTarget.Units.Any(x => x.Owner == Owner))
{
IUnit[] targetUnits = moveTarget.GetBorderTiles().SelectMany(t => t.Units).Where(u => u.Owner != Owner).ToArray();
IUnit[] borderUnits = Map[X, Y].GetBorderTiles().SelectMany(t => t.Units).Where(u => u.Owner != Owner).ToArray();
if (borderUnits.Any(u => targetUnits.Any(t => t.X == u.X && t.Y == u.Y)))
{
if (Human == Owner)
{
GameTask.Enqueue(Message.Error("-- Civilization Note --", TextFile.Instance.GetGameText($"ERROR/ZOC")));
}
return(false);
}
}
}
if (moveTarget.City != null && Map[X, Y][relX, relY].City.Owner != Owner)
{
return(Confront(relX, relY));
}
if (!MoveTargets.Any(t => t.X == moveTarget.X && t.Y == moveTarget.Y))
{
// Target tile is invalid
// TODO: For some tiles, display a message detailing why the move is illegal
return(false);
}
// TODO: This implementation was done by observation, may need a revision
if (MovesLeft == 0 && !moveTarget.Road && moveTarget.Movement > 1)
{
bool success;
if (PartMoves >= 2)
{
// 2/3 moves left? 50% chance of success
success = (Common.Random.Next(0, 2) == 0);
}
else
{
// 2/3 moves left? 33% chance of success
success = (Common.Random.Next(0, 3) == 0);
}
if (!success)
{
PartMoves = 0;
return(false);
}
}
Movement = new MoveUnit(relX, relY);
Movement.Done += MoveEnd;
GameTask.Insert(Movement);
return(true);
}
