public GameState TryMakeMove(GameState oldState, Coords from, Coords to)
{
GameState newState = oldState.Clone();
Context ctx = new Context(newState.GlobalContext);
// Special vars x, y are from coordinates
ctx.SetXYZ(from, newState.CurrentPlayer);
ctx.SetVariable("from", Transform(from, newState.CurrentPlayer));
ctx.SetVariable("to", Transform(to, newState.CurrentPlayer));
ctx.SetVariable("NewGameState", newState);
if (!MoveIsValidGlobal(newState, from, to, ctx)) return null;
Piece piece = board.PieceAt(newState, from, null);
Piece oppPiece = board.PieceAt(newState, to, null);
bool isInlist = EnumerateMovesFromCoord(newState, from).Any(
md => Coords.Match(md.From, from) && Coords.Match(md.To, to));
if (!isInlist) return null;
foreach (var rule in moveRules)
{
// No offboard rules here
if (rule.OffboardRule) continue;
var fromT = Transform(from, newState.CurrentPlayer);
var toT = Transform(to, newState.CurrentPlayer);
if (!MoveIsValidForRule(newState, rule, null, fromT, toT, ctx)) continue;
// Move is valid
rule.RunAction(newState, ctx);
// Perform the move
piece = board.PieceAt(newState, from, null);
if (!board.TryRemove(newState, from, null))
{
// Original piece was removed, should not happen!
throw new InvalidGameException("Cannot move from " + from.ToString() + ", piece " + oppPiece.ToString() + " was removed!");
}
if (!board.TryPut(newState, to, piece, null))
{
// Piece was not captured
throw new InvalidGameException("Cannot move to " + to.ToString() + ", piece " + oppPiece.ToString() + " is in the way!");
}
ctx.SetXYZ(to, newState.CurrentPlayer);
// Move was performed
oldStates.Add(oldState);
newState.CurrentPlayer.PostMove(newState, ctx);
PostMoveActions(newState);
return newState;
}
// No suitable rule found.
return null;
}
public GameState TryMakeMoveFromOffboard(GameState oldState, Piece piece, Coords to)
{
GameState newState = oldState.Clone();
Context ctx = new Context(newState.GlobalContext);
ctx.SetVariable("to", Transform(to, newState.CurrentPlayer));
ctx.SetVariable("NewGameState", newState);
// piece cannot be null
if (piece == null) return null;
// Cannot move opponent's piece
if (piece.Owner != newState.CurrentPlayer) return null;
bool isInlist = EnumerateMovesFromOffboard(newState, piece).Any(
md => md.From == null && Coords.Match(md.To, to) && md.PieceType == piece.Type);
if (!isInlist) return null;
if (!MoveIsValidGlobal(newState, null, to, ctx)) return null;
Piece oppPiece = board.PieceAt(newState, to, null);
foreach (var rule in moveRules)
{
// Only offboard rules here
if (!rule.OffboardRule) continue;
if (!MoveIsValidForRule(newState, rule, piece, null, to, ctx)) continue;
// Move is valid
rule.RunAction(newState, ctx);
// Perform the move
if (!newState.CurrentPlayer.RemoveOffBoard(newState, piece))
{
// Original piece was removed, should not happen!
throw new InvalidGameException("Cannot move from offboard, piece " + oppPiece.ToString() + " was removed!");
}
if (!board.TryPut(newState, to, piece, null))
{
// Piece was not captured
throw new InvalidGameException("Cannot move to " + to.ToString() + ", piece " + oppPiece.ToString() + " is in the way!");
}
ctx.SetXYZ(to, newState.CurrentPlayer);
// Move was performed
oldStates.Add(oldState);
newState.CurrentPlayer.PostMove(newState, ctx);
PostMoveActions(newState);
return newState;
}
// No suitable rule found.
return null;
}
protected override void OnRender(System.Windows.Media.DrawingContext dc)
{
if (game == null) return;
if (ImageCache == null) return;
bool needsCheckerBoard = true;
if (ImageCache.Contains("bg"))
{
dc.DrawImage(ImageCache["bg"], new Rect(0, 0, Width, Height));
needsCheckerBoard = false;
}
Coords size = ict.GameToBoard(game.Size);
for (int i = 0; i < size[0]; i++)
{
for (int j = 0; j < size[1]; j++)
{
int myj = size[1] - j - 1;
Coords c = new Coords(i+1, j+1);
if (highlightCoord.Contains(c))
{
dc.DrawRectangle(Brushes.LightBlue, null, new Rect(i * 30, myj * 30, 30, 30));
}
else if (needsCheckerBoard)
{
Brush b = ((i + j) % 2) == 0 ? Brushes.Brown : Brushes.BurlyWood;
dc.DrawRectangle(b, null, new Rect(i * 30, myj * 30, 30, 30));
}
}
}
foreach (var kvp in game.GetPieces(GetGameState()))
{
Coords c = ict.GameToBoard(kvp.Key);
Piece p = kvp.Value;
string player = p.Owner.ID.ToString();
string type = p.Type;
int x = (c[0]-1) * 30;
int y = (size[1]-c[1]) * 30;
if (highlightPiece.Contains(p))
{
dc.DrawRectangle(Brushes.LightBlue, null, new Rect(x, y, 30, 30));
}
dc.DrawImage(ImageCache[type + player], new System.Windows.Rect(x, y, 30, 30));
}
for (int i = 0; i < size[0]; i++)
{
for (int j = 0; j < size[1]; j++)
{
int myj = size[1] - j - 1;
Coords c = new Coords(i + 1, j + 1);
if (PrintGameCoords && ict.IsValidBoardCoord(c))
{
string str = c.ToString() + "\n" + ict.BoardToGame(c);
dc.DrawText(new FormattedText(
str,
CultureInfo.CurrentCulture,
FlowDirection.LeftToRight,
new Typeface("Consolas"),
8,
Brushes.Black),
new Point(i * 30, myj * 30));
}
}
}
}
