// create all drops and moves for piece, position and board
// checks movetype restriction if supplied, but Any means any
// CHECK: I thought this was the way it used to be???
// checks position or zone restriction by peeking into movegen
internal IEnumerable <MoveModel> CreateMoves(MoveKinds kind, PieceValue piece, PositionValue position,
BoardModel board, MoveTypeValue movetype)
{
var movegens = (movetype == MoveTypeValue.Any) ? _movegens.Values.SelectMany(m => m)
: _movegens.SafeLookup(movetype);
if (movegens == null)
{
yield break;
}
foreach (var movegen in movegens)
{
var ok = (kind == MoveKinds.Move || movegen.PosOrZone.IsNull);
if (!ok)
{
var posorzone = movegen.PosOrZone.Value as PositionOrZone;
ok = (posorzone.IsPosition) ? (position == posorzone.Position)
: board.InZone(posorzone.Zone, position);
}
if (ok)
{
Logger.WriteLine(4, "CreateMoves {0} piece:{1} position:{2} movetype:{3}", kind, piece, position, movetype);
foreach (var move in movegen.Exec(kind, piece, position, board))
{
yield return(move);
}
}
}
// TODO: after each Exec if the partial flag is set, add any possible further moves
// (perhaps of a specific move type)
}
BoolValue s_InZone_(ZoneValue zone, PositionOrDirection posordir = null)
{
return(BoolValue.Create(_board.InZone(zone, ToPosition(posordir))));
}
