public bool Move(Direction direction)
{
if (current == Tetromino.Zero)
{
return(false);
}
if (Move(current, direction))
{
current = current.Move(direction);
return(true);
}
return(false);
}
public override void Paint(Graphics graphics)
{
base.Paint(graphics);
//绘制投影
if (ProjectEnabled && IsTetrominoFalling)
{
Tetromino proj = current;
EraseTetromino(current);
while (IsEmpty(proj))
{
proj = proj.Move(Direction.Down);
}
proj = proj.Move(Direction.Up);
DrawTetromino(current, false);
Point[] cells = new Point[]
{
new Point(proj.XC, proj.YC), new Point(proj.X1, proj.Y1),
new Point(proj.X2, proj.Y2), new Point(proj.X3, proj.Y3)
};
SolidBrush brush = new SolidBrush(Color.FromArgb(32, 192, 0, 0));
foreach (Point cell in cells)
{
if (!IsEmpty(cell.Y, cell.X))
{
continue;
}
Rectangle tile = new Rectangle(6 + cell.X * TileSize, 6 + cell.Y * TileSize, TileSize - 2, TileSize - 2);
graphics.FillRectangle(brush, tile);
}
}
}
protected Tetromino RotateTetromino(Tetromino t)
{
Tetromino rotated = t.Rotate();
EraseTetromino(t);
//旋转后可能与其他块有重叠，故略微挪动以找到空位
foreach (Direction direction in Enum.GetValues(typeof(Direction)))
{
if (IsEmpty(rotated.Move(direction)))
{
DrawTetromino(rotated, false);
return(rotated);
}
}
DrawTetromino(t, false);
return(Tetromino.Zero);
}
protected bool Move(Tetromino t, Direction direction)
{
Tetromino moved = t.Move(direction);
//先将传入的tetromino从tiles中抹掉
EraseTetromino(t);
if (IsEmpty(moved))
{
//若可写入则写入tiles
DrawTetromino(moved, false);
return(true);
}
else
{
//如果非空则将传入的tetromino写回tiles，即不运动
t.Type = moved.Type;
DrawTetromino(t, false);
return(false);
}
}
public static void Move(Tetromino tetromino, Brush[,] fieldMatrix, MoveContext context)
{
RemoveTetrominoFromFieldMatrix(tetromino, fieldMatrix);
tetromino.Move(context);
UpdateField(tetromino, fieldMatrix);
}