public SudokuStruct setSudokuLevel(SudokuStruct oldMatrix, string level)
{
SudokuStruct NewMatrix = new SudokuStruct();
//Array.Copy(oldMatrix,NewMatrix,9);
int[] FixedIndex = new int[9] {
0, 1, 2, 3, 4, 5, 6, 7, 8
};
Random RandomGen = new Random();
int indx;
int numofiterations = 0;
for (int Rows = 0; Rows < 9; Rows++)
{
Array.Copy(oldMatrix.SudokuCells, (Rows * 9), NewMatrix.SudokuCells, (9 * Rows), 9);
}
switch (level)
{
case "Easy":
numofiterations = 2;
break;
case "Medium":
numofiterations = 3;
break;
case "Hard":
numofiterations = 4;
break;
case "Insane":
numofiterations = 7;
break;
}
for (int row = 0; row < 9; row++)
{
int[] Indexes = new int[9];
Array.Copy(FixedIndex, Indexes, 9);
for (int hide = 0; hide <= numofiterations; hide++)
{
indx = RandomGen.Next(Indexes.Length);
int NumIndx = Indexes[indx];
NewMatrix.SetVisibility(false, row, NumIndx);
//NewMatrix.SudokuCells[row, NumIndx].IsVisible = false;
Indexes = UpdateIndxArray(Indexes, indx);
}
}
for (int col = 0; col < 9; col++)
{
int numhidden = 0;
int[] Indexes = FixedIndex;
for (int row = 0; row < 9; row++)
{
if (!NewMatrix.SudokuCells[row, col].IsVisible)
{
Indexes[row] = -1;
numhidden++;
}
}
if (numhidden < numofiterations)
{
for (int hide = numhidden; hide <= numofiterations; hide++)
{
indx = RandomGen.Next(Indexes.Length);
int NumIndx = Indexes[indx];
if (NumIndx > -1)
{
NewMatrix.SetVisibility(false, NumIndx, col);
//NewMatrix.SudokuCells[NumIndx, col].IsVisible = false;
Indexes = UpdateIndxArray(Indexes, indx);
}
else
{
Indexes = UpdateIndxArray(Indexes, indx);
}
}
}
}
return(NewMatrix);
}
