private void AddNormalMovesFrom(List <PossibleMove> possibleMoves, Square from, Direction dir)
{
if (!from.TryGetBorder(dir, out var next))
{
return;
}
if (next.Color == _currentTurn.Other)
{
var jump = next.GetBorder(dir);
if (jump is null || jump.IsNotEmpty || !CanCaptureInDirection(dir, from))
{
return;
}
int chainLength = NormalChainLength(from, jump, next);
if (chainLength > _minCaptureSequence)
{
_minCaptureSequence = chainLength;
possibleMoves.Clear();
}
if (chainLength >= _minCaptureSequence)
{
possibleMoves.Add(PossibleMove.CaptureMove(from, jump, next, chainLength > 1));
}
return;
}
if (next.IsEmpty && !MustCapture && CanMoveInDirection(dir, from))
{
possibleMoves.Add(PossibleMove.NormalMove(from, next));
}
}
private void AddFlyingMovesFrom(List <PossibleMove> possibleMoves, Square from, Direction dir)
{
Square?victim = null;
for (var next = from.GetBorder(dir); next is not null; next = next.GetBorder(dir))
{
if (next.IsEmpty && victim is not null)
{
int chainLength = FlyingChainLength(from, next, victim);
if (chainLength > _minCaptureSequence)
{
_minCaptureSequence = chainLength;
possibleMoves.Clear();
}
if (chainLength >= _minCaptureSequence)
{
possibleMoves.Add(PossibleMove.CaptureMove(from, next, victim, chainLength > 1));
}
continue;
}
if (next.Color == _currentTurn.Other && victim is null)
{
var jump = next.GetBorder(dir);
if (jump is null || jump.IsNotEmpty)
{
return;
}
victim = next;
continue;
}
if (next.IsEmpty)
{
if (!MustCapture)
{
possibleMoves.Add(PossibleMove.NormalMove(from, next));
}
continue;
}
return;
}
}