private void PrepareTiles()
{
BinaryGrid.ForEachTile((tile) =>
{
tile.MergedFrom = null;
tile.PreviousPos = tile.Pos;
});
}
public void Move(MoveType move)
{
if (IsGameOver)
{
return;
}
List <int> Xs;
List <int> Ys;
bool moved = false;
var vector = GetVector(move);
BuildTransversals(vector, out Xs, out Ys);
PrepareTiles();
foreach (var x in Xs)
{
foreach (var y in Ys)
{
var pos = new XY(x, y);
var tile = BinaryGrid.TileAt(pos);
if (tile != null)
{
XY fathest, nextPos;
FindFarthestPosition(pos, vector, out fathest, out nextPos);
var nextTile = BinaryGrid.TileAt(nextPos);
if ((nextTile != null) &&
(nextTile.Value == tile.Value) &&
(nextTile.MergedFrom == null))
{
RaiseTileRemoved(nextTile);
BinaryGrid.RemoveTile(nextPos);
tile.MergedFrom = nextTile;
tile.Value *= 2;
Score += tile.Value;
BinaryGrid.MoveTile(tile, nextPos);
RaiseTileMoved(tile);
if (tile.Value >= 2048)
{
HasGameWon = true;
RaiseGameWon();
}
moved = true;
}
else
{
if ((pos.X != fathest.X) ||
(pos.Y != fathest.Y))
{
BinaryGrid.MoveTile(tile, fathest);
RaiseTileMoved(tile);
moved = true;
}
}
}
}
}
if (moved)
{
Moves++;
GameData.MoveCount++;
AddRandomTile();
if (!MovesAvailable())
{
IsGameOver = true;
RaiseGameOver();
}
}
}