private bool ProcessSequence(int x, int y, IActor actedPlayer, ref C4Actor lastTrackedPlayer, ref int sequenceLength, out EEndGameStatus result)
{
result = EEndGameStatus.Draw;
C4Actor gridActor = Grid[x, y] as C4Actor;
if (gridActor == null)
{
lastTrackedPlayer = null;
sequenceLength = 0;
return(false);
}
if (lastTrackedPlayer == null)
{
lastTrackedPlayer = gridActor;
sequenceLength = 1;
}
else if (lastTrackedPlayer != gridActor)
{
lastTrackedPlayer = gridActor;
sequenceLength = 1;
}
else // lastTrackedPlayer == gridActor
{
if (++sequenceLength >= WIN_SEQUENCE_LENGTH)
{
result = lastTrackedPlayer == (C4Actor)actedPlayer ? EEndGameStatus.Win : EEndGameStatus.Loss;
return(true);
}
}
return(false);
}
public C4GameState(string aPlayerA, string aPlayerB, C4Actor aJustActed) : base(aPlayerA, aPlayerB, aJustActed, GRID_WIDTH, GRID_HEIGHT)
{
for (int x = 0; x < GridWidth; ++x)
{
for (int y = 0; y < GridHeight; ++y)
{
Grid[x, y] = null;
}
}
}
public override IEnumerable <IAction> GetAllMoves()
{
List <IAction> actions = new List <IAction>();
C4Actor nowActing = new C4Actor(ActorJustActed.Name.Equals(PlayerAName) ? PlayerBName : PlayerAName);
for (int x = 0; x < GridWidth; ++x)
{
for (int y = 0; y < GridHeight; ++y)
{
if (Grid[x, y] == null)
{
IAction newAction = new C4Action(nowActing, this, x, y);
actions.Add(newAction);
// only one action is possible per column
break;
}
}
}
return(actions);
}
public C4Action(C4Actor aActing, C4GameState aState, int x, int y) : base(aActing)
{
this._incomingState = aState;
this._x = x;
this._y = y;
}
public C4GameState(C4GameState aOtherGameState, C4Actor aJustActed, AbstractActor[,] aGrid) : base(aOtherGameState.PlayerAName, aOtherGameState.PlayerBName, aJustActed, aGrid)
{
}
public C4GameState(string aPlayerA, string aPlayerB, C4Actor aJustActed, AbstractActor[,] aGrid) : base(aPlayerA, aPlayerB, aJustActed, aGrid)
{
}
public override EEndGameStatus GetResult(IActor player)
{
// check verticals for victory
for (int x = 0; x < GridWidth; ++x)
{
int sequenceLength = 0;
C4Actor lastTrackedPlayer = null;
for (int y = 0; y < GridHeight; ++y)
{
if (ProcessSequence(x, y, player, ref lastTrackedPlayer, ref sequenceLength, out EEndGameStatus result))
{
return(result);
}
}
}
// check horizontals for victory
for (int y = 0; y < GridHeight; ++y)
{
int sequenceLength = 0;
C4Actor lastTrackedPlayer = null;
for (int x = 0; x < GridWidth; ++x)
{
if (ProcessSequence(x, y, player, ref lastTrackedPlayer, ref sequenceLength, out EEndGameStatus result))
{
return(result);
}
}
}
// check diagonals for victory
for (int x = 0; x < GridWidth; ++x)
{
for (int y = 0; y < GridHeight; ++y)
{
int sequenceURLength = 0;
C4Actor lastTrackedPlayerUR = null;
int sequenceULLength = 0;
C4Actor lastTrackedPlayerUL = null;
for (int i = 0; i < WIN_SEQUENCE_LENGTH; i++)
{
try
{
// diagonally up-right
if (ProcessSequence(x + i, y + i, player, ref lastTrackedPlayerUR, ref sequenceURLength, out EEndGameStatus urResult))
{
return(urResult);
}
}
catch (System.IndexOutOfRangeException e)
{
// out of range, break
break;
}
try
{
// diagonally up-left
if (ProcessSequence(x - i, y + i, player, ref lastTrackedPlayerUL, ref sequenceULLength, out EEndGameStatus ulResult))
{
return(ulResult);
}
}
catch (System.IndexOutOfRangeException e)
{
// out of range, break
break;
}
}
}
}
return(EEndGameStatus.Draw);
}