public bool PutShip(Placement placement)
{
if (!(placement.Vessel is Vessel))
throw new ArgumentException("Expecting ship to be of type Vessel, but it was something else (possible cheat).", "placement");
return _board.PlacePlayerShip(_player, placement);
}
public void PlaceShips(IPlayerView playerView, ICollection<IVessel> ships)
{
/* This AI places ships in the upper right corner and to the left.
*
* E.g.
*
* 10 # # # # #
* 9 # # # # #
* 8 # # # #
* 7 # #
* 6 #
* 5
* 4
* 3
* 2
* 1
* 1 2 3 4 5 6 7 8 9 10
*/
Placement place;
Coordinate coord;
int xMax = playerView.GetXMax();
int yMax = playerView.GetYMax();
int i = 0;
foreach (IVessel ship in ships)
{
coord = new Coordinate(xMax - (2 * i), yMax);
place = new Placement(ship, coord, Orientation.Vertical);
playerView.PutShip(place);
i++;
}
}
public void PlaceShips(IPlayerView playerView, ICollection<IVessel> ships)
{
int maxX = playerView.GetXMax();
int maxY = playerView.GetYMax();
Placement placement;
int xPos;
int yPos;
Orientation direction;
foreach (IVessel ship in ships)
{
do
{
xPos = _rand.Next(maxX) + 1;
yPos = _rand.Next(maxY) + 1;
direction = _rand.NextDouble() > 0.5 ? Orientation.Horizontal : Orientation.Vertical;
placement = new Placement(ship, xPos, yPos, direction);
} while (!playerView.PutShip(placement));
}
}
private Coordinate ShipEndPoint(Placement placement)
{
Coordinate end;
if (placement.Orientation == Orientation.Horizontal)
end = new Coordinate(placement.X + (placement.Vessel.Length - 1), placement.Y);
else //if (placement.Orientation == Orientation.Vertical)
end = new Coordinate(placement.X, placement.Y - (placement.Vessel.Length - 1)); // TODO: This should be changed.
return end;
}
private bool IsLegalBoardPlacement(Placement placement)
{
Coordinate start, end, boardTopLeft, boardBottomRight;
start = new Coordinate(placement);
end = ShipEndPoint(placement);
boardTopLeft = new Coordinate(1, YMax);
boardBottomRight = new Coordinate(XMax, 1);
if (CoordinateInSquare(start, boardTopLeft, boardBottomRight) &&
CoordinateInSquare(end, boardTopLeft, boardBottomRight))
return true;
return false;
}
private bool IsInTheWayOf(Placement placedShip, Placement placement)
{
Coordinate shipTopLeft, shipBottomRight, endPoint, tmpSegment;
// TODO: This should be BottomLeft and TopRight if going away from origo.
shipTopLeft = new Coordinate(placedShip.X - 1, placedShip.Y + 1);
endPoint = ShipEndPoint(placedShip);
shipBottomRight = new Coordinate(endPoint.X + 1, endPoint.Y - 1);
for (int i = 0; i <= placement.Vessel.Length; i++)
{
if (placement.Orientation == Orientation.Horizontal)
tmpSegment = new Coordinate(placement.X + i, placement.Y);
else //if (placement.Orientation == Orientation.Vertical)
tmpSegment = new Coordinate(placement.X, placement.Y - i);
if (CoordinateInSquare(tmpSegment, shipTopLeft, shipBottomRight))
return true;
}
return false;
}
internal bool PlacePlayerShip(Player _player, Placement placement)
{
if (_gameStarted)
throw new Exception(String.Format("Player {0} tried to place a ship after the game started. Bad player.", _player));
List<Placement> playerFleet = _playerShips[_player];
if (IsLegalBoardPlacement(placement))
{
foreach (Placement placedShip in playerFleet)
{
if (IsInTheWayOf(placedShip, placement))
return false;
}
}
else
return false;
playerFleet.Add(placement);
return true;
}