private bool CheckTake(Vector2Int takePos, Vector2Int posAfterTake, Checkboard checkboard, out Move move)
{
move = null;
if (checkboard.Exists(takePos) &&
!checkboard.IsEmptyAndExists(takePos) &&
checkboard[takePos].Color != Color &&
checkboard.IsEmptyAndExists(posAfterTake))
{
move = new Move {
NewPos = posAfterTake, PawnPos = Position, TakePos = takePos
};
return(true);
}
return(false);
}
private bool CheckNormalMove(Vector2Int movePos, Checkboard checkboard, out Move move)
{
move = null;
if (checkboard.IsEmptyAndExists(movePos))
{
move = new Move {
NewPos = movePos, PawnPos = Position
};
return(true);
}
return(false);
}
private IEnumerable <Move> CheckKingMoves(Vector2Int startPos, System.Func <Vector2Int, Vector2Int> moveFunc, Checkboard checkboard)
{
var checkPos = moveFunc(startPos);
while (checkboard.IsEmptyAndExists(checkPos))
{
yield return(new Move {
NewPos = checkPos,
PawnPos = startPos,
});
checkPos = moveFunc(checkPos);
}
}
private IEnumerable <Move> CheckKingTakes(Vector2Int startPos, System.Func <Vector2Int, Vector2Int> moveFunc, Checkboard checkboard)
{
var checkPos = startPos;
var prevPos = startPos;
while (checkboard.Exists(checkPos))
{
checkPos = moveFunc(checkPos);
var posAfterTake = moveFunc(checkPos);
if (!(checkboard.IsEmptyAndExists(prevPos) || checkboard[prevPos].Position == startPos))
{
yield break;
}
if (CheckTake(checkPos, posAfterTake, checkboard, out var move))
{
yield return(move);
var endPos = moveFunc(move.NewPos);
while (checkboard.IsEmptyAndExists(endPos))
{
yield return(new Move {
NewPos = endPos,
PawnPos = move.PawnPos,
TakePos = move.TakePos,
});
endPos = moveFunc(endPos);
}
yield break;
}
prevPos = moveFunc(prevPos);
}
}
