public void PlaceShip(Ship ship)
{
this.OwnBoard.PlaceShip(ship);
}
/// <summary>
/// Attempt to place a ship on the board.
/// </summary>
/// <param name="ship">Details of the ship to place.</param>
/// <exception cref="ShipCollisionException">Thrown if placing the ship would overlap with an existing ship.</exception>
public void PlaceShip(Ship ship)
{
var newPlacedShips = new List<Ship>(placedShips);
newPlacedShips.Add(ship);
if (Ship.HasCollisions(newPlacedShips))
{
throw new ShipCollisionException("Placing this ship would overlap with an existing ship.");
}
placedShips = newPlacedShips;
}
/// <summary>
/// Place a ship on a players board.
/// </summary>
/// <param name="playerId">Identifier of the player to place the ship for.</param>
/// <param name="ship">Details of the ship to place.</param>
/// <exception cref="InvalidOperationException">Thrown if a ship is placed in any other state than during setup.</exception>
/// <exception cref="ShipCollisionException">Thrown if placing the ship would overlap with an existing ship.</exception>
public void PutShip(Guid playerId, Ship ship)
{
if (this.State != GameState.Setup)
{
throw new InvalidOperationException("Cannot put ship in a game that has already started.");
}
players[playerId].PlaceShip(ship);
}
/// <summary>
/// Determine if two ships are intersecting (overlapping).
/// </summary>
/// <param name="a">First ship.</param>
/// <param name="b">Second ship.</param>
/// <returns>Boolean indicating if the ships overlap.</returns>
public static bool Intersects(Ship a, Ship b)
{
// This is a little hackish, would look for a better solution,
// but this appears to work against the tests and is not a performance bottleneck.
switch (a.Orientation)
{
case ShipOrientation.Horizontal:
switch (b.Orientation)
{
case ShipOrientation.Horizontal:
return a.Location.Lat == b.Location.Lat
&& ((a.Location.Long <= b.Location.Long && a.EndCoordinate.Long >= b.Location.Long)
|| (b.Location.Long <= a.Location.Long && b.EndCoordinate.Long >= a.Location.Long));
default:
return (a.Location.Long <= b.Location.Long && a.EndCoordinate.Long >= b.Location.Long)
&& (b.Location.Lat <= a.Location.Lat && b.EndCoordinate.Lat >= a.Location.Lat);
}
default:
switch (b.Orientation)
{
case ShipOrientation.Vertical:
return a.Location.Long == b.Location.Long
&& ((a.Location.Lat <= b.Location.Lat && a.EndCoordinate.Lat >= b.Location.Lat)
|| (b.Location.Lat <= a.Location.Lat && b.EndCoordinate.Lat >= a.Location.Lat));
default:
return (a.Location.Lat <= b.Location.Lat && a.EndCoordinate.Lat >= b.Location.Lat)
&& (b.Location.Long <= a.Location.Long && b.EndCoordinate.Long >= a.Location.Long);
}
}
}
