/// <summary>
/// Given a pice and its new location, check if the move is allowed based on obstructions, limits, etc
/// </summary>
/// <param name="p"></param>
/// <param name="targetCoord"></param>
/// <param name="currentBoard"></param>
private bool InitializeAndValidateMove(Piece p, CoordAbs targetCoord, Board currentBoard, GameRules rules)
{
FromCoord = new CoordAbs(p.pos.X, p.pos.Y);
movingPiece = p;
outcome = GameRules.MoveOutcomes.Unknown;
opponentPiece = null;
ToCoord = targetCoord;
// finish populating the Move and check the legality
Legal = false;
// ensure the move stays on the board
if (ToCoord.X >= currentBoard.Width ||
ToCoord.X < 0 ||
ToCoord.Y >= currentBoard.Height ||
ToCoord.Y < 0)
{
return(false);
}
opponentPiece = currentBoard.GetPieceAtCoord(ToCoord); // may be null
if (opponentPiece?.Owner == movingPiece.Owner || // cannot move into owned space
currentBoard.GetLocationAtCoord(ToCoord)?.Passable == false) // cannot move into obstacles
{
return(false);
}
// check if theres is an empty line to the target location
if (p.Type.CanJump == false)
{
if (rules.LoggingSettings.debugJumpchecks)
{
Console.WriteLine($"Checking space between {FromCoord} to {ToCoord}...");
}
int xmin = Math.Min(FromCoord.X, ToCoord.X);
int xmax = Math.Max(FromCoord.X, ToCoord.X);
int ymin = Math.Min(FromCoord.Y, ToCoord.Y);
int ymax = Math.Max(FromCoord.Y, ToCoord.Y);
for (int y = ymin; y <= ymax; y++)
{
for (int x = xmin; x <= xmax; x++)
{
// dont include the coords of FromCoord nor ToCoord, just between
if (FromCoord.X == x && FromCoord.Y == y ||
ToCoord.X == x && ToCoord.Y == y)
{
continue;
}
// check if the path is clear of empty pieces and is traversable
if (currentBoard.PiecesLayout[x, y] != null || !currentBoard.LocationsLayout[x, y].Passable)
{
Legal = false;
return(false);
}
if (rules.LoggingSettings.debugJumpchecks)
{
Console.WriteLine($"{x} {y} is " + currentBoard.PiecesLayout[x, y]
+ " / " + currentBoard.LocationsLayout[x, y].Passable);
}
}
}
}
// todo: is legality and battle result predictions premature at this stage?
// outcome = movingPiece.PredictWinner(opponentPiece, rules);//defaults to "move" if nothing is in the way
Legal = true;
return(true);
}
public Piece GetPieceAtCoord(CoordAbs c) => PiecesLayout.TryIndex(c.X, c.Y); // can return null public LocationType GetLocationAtCoord(CoordAbs c) => LocationsLayout.TryIndex(c.X, c.Y); // can return null
public Move(Piece p, CoordAbs targetCoord, Board currentBoard, GameRules rules)
{
InitializeAndValidateMove(p, targetCoord, currentBoard, rules);
}
} // probably static per session
public Piece GetPieceAtCoord(CoordAbs c) => PiecesLayout.TryIndex(c.X, c.Y); // can return null