internal bool intersects(Tile t, Game2048 game)
{
if (position == GridPosition)
{
if (moveX != 0)
{
return(t.GridPosition == new Vector2(GridPosition.X - moveX, GridPosition.Y));
}
if (moveY != 0)
{
return(t.GridPosition == new Vector2(GridPosition.X, GridPosition.Y - moveY));
}
}
else
{
if ((moveX != 0 && t.GridPosition.Y == GridPosition.Y))
{
return(Math.Abs(GetCenter(game).X - t.GetCenter(game).X) <= game.drawTileSize + game.drawMarginSize * 2);
}
if ((moveY != 0 && t.GridPosition.X == GridPosition.X))
{
return(Math.Abs(GetCenter(game).Y - t.GetCenter(game).Y) <= game.drawTileSize + game.drawMarginSize * 2);
}
}
return(false);
}
internal bool Move(Game2048 game)
{
isMoving = false;
if (checkMerger(game))
{
return(false);
}
if (moveX == 0 && moveY == 0)
{
return(false);
}
Vector2 nextPosition = new Vector2(position.X + moveX, position.Y + moveY);
Rectangle nextBox = game.getTileSquare(new Vector2(nextPosition.X, nextPosition.Y));
if (moveX == 0 && moveY == 0)
{
return(false);
}
bool inBounds = nextBox.X - game.drawMarginSize >= game.drawPosition.X && nextBox.Y - game.drawMarginSize >= game.drawPosition.Y && nextBox.X + nextBox.Width + game.drawMarginSize <= game.drawBoardSize + game.drawPosition.X && nextBox.Y + nextBox.Height + game.drawMarginSize <= game.drawBoardSize + game.drawPosition.Y;
if (!inBounds)
{
snapToGrid();
return(false);
}
Vector2 next = new Vector2(GridPosition.X + (moveX < 0 ? -1 : moveX > 0 ? 1 : 0), GridPosition.Y + (moveY < 0 ? -1 : moveY > 0 ? 1 : 0));
Tile collision = game.Tiles.Find(t => t != this && t.value > 0 && (t.value != value || hasmerged || t.hasmerged) && t.position == t.GridPosition && t.GridPosition == next && getDistance(t.GetCenter(game), GetCenter(game)) <= (t.value == value ? getDistance(t.GetGridCenter(game), GetGridCenter(game)) : getDistance(t.GetGridCenter(game), GetGridCenter(game))));
if (collision is Tile)
{
snapToGrid();
return(false);
}
isMoving = true;
position = nextPosition;
return(true);
}
internal bool checkMerger(Game2048 game)
{
if (hasmerged)
{
return(false);
}
Tile merge = game.Tiles.Find(t => t != this && t.value == value && getDistance(t.GetCenter(game), GetCenter(game)) < game.drawMarginSize);
if (merge is Tile tile && !tile.hasmerged)
{
value = 0;
game.score += tile.nextValue();
tile.hasmerged = true;
return(false);
}
return(false);
}
internal Point GetGridCenter(Game2048 game)
{
return(game.getTileSquare(GridPosition).Center);
}