public static NumberCell Merge(NumberCell merger, NumberCell mergee)
{
merger.Value += mergee.Value;
merger.Merged = true;
merger.Position = mergee.Position;
return(merger);
}
private static NumberCell[,] PopulateCellArrays(string[] cellLines)
{
var cells = new NumberCell[4, 4];
for (int y = 0; y < rows; y++)
{
var values = cellLines[y].Split();
for (int x = 0; x < columns; x++)
{
var position = Tuple.Create(y, x);
cells[y, x] = new NumberCell(int.Parse(values[x]), position);
}
}
return(cells);
}
private static void MergeOrMove(Tuple <int, int> moveFactor)
{
int changeY, changeX;
changeY = changeX = 1;
if (moveFactor.Item1 < 0)
{
changeY = -1;
}
if (moveFactor.Item2 < 0)
{
changeX = -1;
}
// Process actions "bottom up" to produce expected merge behavior, see Sample 5
for (int y = changeY == 1? 3 : 0; InRange(y); y -= changeY)
{
for (int x = changeX == 1 ? 3 : 0; InRange(x); x -= changeX)
{
var cell = cells[y, x];
var pos = cell.Position;
pos = AddPositions(pos, moveFactor);
var newY = pos.Item1;
var newX = pos.Item2;
if (InRange(newY) && InRange(newX))
{
var nextCell = cells[newY, newX];
if (cells[newY, newX].Value == 0)
{
cells[newY, newX] = cell;
cell.SetPosition(pos);
cells[y, x] = NumberCell.EmptyCell;
actions++;
}
else if (!(cell.Merged || nextCell.Merged) && cell.Value == nextCell.Value)
{
cell = NumberCell.Merge(cell, nextCell);
cells[newY, newX] = cell;
cell.SetPosition(pos);
cells[y, x] = NumberCell.EmptyCell;
actions++;
}
}
}
}
}