private unsafe int ScoreForGrid(byte *grid, int depth)
{
if (GridFunctions.HasEmptySquares(grid) == false)
{
return(GridFunctions.SumValuesInGrid(grid));
}
int permutations = GridFunctions.CountEmptySquares(grid);
int[] scores = new int[permutations];
current += 16;
foreach (var subDirection in new[] { (Direction.left, Direction.right), (Direction.up, Direction.down) })
private unsafe int ScoreForGrid(byte *grid, int depth)
{
if (GridFunctions.HasEmptySquares(grid) == false)
{
return(GridFunctions.SumValuesInGrid(grid));
}
int permutations = GridFunctions.CountEmptySquares(grid);
int[] scores = new int[permutations];
current += 16;
foreach (Direction subDirection in Enum.GetValues(typeof(Direction)))
{
Permutator permutator = new Permutator(grid, subDirection);
Dictionary <uint, int> scoreCache = new Dictionary <uint, int>();
int k = 0;
while (permutator.TryGetPermutation(current, out uint permutationHash))
{
int score;
if (scoreCache.ContainsKey(permutationHash))
{
score = scoreCache[permutationHash];
}
else
{
if (depth == 1)
{
score = FinalScoreForGrid(current);
}
else
{
score = ScoreForGrid(current, depth - 1);
}
scoreCache.Add(permutationHash, score);
}
scores[k] = Math.Max(scores[k], score);
k++;
}
}
current -= 16;
//GridFunctions.FreeGrid(tempGrid);
return((int)scores.Average());
}
