private static bool TryApplyInstruction(ref SimpleBoard board, Piece piece, Instruction inst, out Piece result,
NativeArray <int4x4> pieceShapes)
{
switch (inst)
{
case Left:
result = piece.WithOffset(-1, 0);
return(!board.CollidesFast(result, pieceShapes));
case Right:
result = piece.WithOffset(1, 0);
return(!board.CollidesFast(result, pieceShapes));
case Cw:
var t = SRSNoAlloc.TryRotate(piece, ref board, true, pieceShapes, out var r1, out var r1Result);
result = piece.kind == T?r1Result.WithTSpinStatus(board.CheckTSpin(r1Result, r1)) : r1Result;
return(t);
case Ccw:
var s = SRSNoAlloc.TryRotate(piece, ref board, false, pieceShapes, out var r2, out var r2Result);
result = piece.kind == T?r2Result.WithTSpinStatus(board.CheckTSpin(r2Result, r2)) : r2Result;
return(s);
case SonicDrop:
var originY = piece.y;
result = board.SonicDropFast(piece, pieceShapes);
return(originY != result.y);
default:
throw new ArgumentOutOfRangeException(nameof(inst), inst, null);
}
}
private static void Confirm(ref SimpleBoard board, ref NativeHashMap <Piece, Move> lookup, Move mv,
NativeArray <int4x4> pieceShapes)
{
if (!IsAboveStacking(mv.piece, 20) && !board.CollidesFast(mv.piece, pieceShapes))
{
lookup.TryAdd(mv.piece, mv);
}
}
public static bool TryRotate(Piece piece, ref SimpleBoard board, bool cw, NativeArray <int4x4> pieceShapes,
out int rotation, out Piece rotated)
{
if (piece.kind == PieceKind.O)
{
rotation = 0;
rotated = piece;
return(true);
}
var rotatedDirection = GetRotatedDirection(piece.spin, cw);
var newPiece = new Piece(piece.kind, piece.x, piece.y, rotatedDirection);
if (!board.CollidesFast(newPiece, pieceShapes))
{
rotation = 0;
rotated = newPiece;
return(true);
}
var key = piece.spin * 10 + rotatedDirection;
var offsetTable = piece.kind == PieceKind.I
? RotationTableI[KeyToIndex(key)]
: RotationTable[KeyToIndex(key)];
for (var i = 0; i < 4; i++)
{
newPiece = piece.WithOffset(offsetTable[i]).WithSpin(rotatedDirection);
if (!board.CollidesFast(newPiece, pieceShapes))
{
rotation = i + 1;
rotated = newPiece;
return(true);
}
}
rotation = default;
rotated = default;
return(false);
}
