public static T[,] Rotate <T>(this T[,] matrix, MatrixRotationType rotationType = MatrixRotationType.Clockwise)
{
T[,] rotation = null;
switch (rotationType)
{
case MatrixRotationType.Clockwise:
{
rotation = matrix.RotateClockwise();
break;
}
case MatrixRotationType.Clockwise180:
{
rotation = matrix.RotateClockwise180();
break;
}
case MatrixRotationType.CounterClockwise:
{
rotation = matrix.RotateCounterClockwise();
break;
}
}
return(rotation);
}
public static bool RotateInline <T>(this T[,] matrix, MatrixRotationType rotationType = MatrixRotationType.Clockwise)
{
if (matrix == null || matrix.Length < 1)
{
return(false);
}
int rows = matrix.GetLength(0);
int columns = matrix.GetLength(1);
int round = rows / 2 + 1;
if (rows != columns)
{
return(false);
}
if (round == 1)
{
return(true);
}
for (int x = 0; x <= round; x++)
{
int range = round - x;
for (int y = x; y <= range; y++)
{
int r = rows - x - 1; // opposite in row
int c = columns - y - 1; // opposite in column
var t = matrix[x, y]; // keep start point
switch (rotationType)
{
case MatrixRotationType.Clockwise:
{
matrix[x, y] = matrix[c, x];
matrix[c, x] = matrix[r, c];
matrix[r, c] = matrix[y, r];
matrix[y, r] = t;
break;
}
case MatrixRotationType.Clockwise180:
{
matrix[x, y] = matrix[r, c]; // switch
matrix[r, c] = t;
var s = matrix[c, x]; // keep switching point
matrix[c, x] = matrix[y, r];
matrix[y, r] = s;
break;
}
case MatrixRotationType.CounterClockwise:
{
matrix[x, y] = matrix[y, r];
matrix[y, r] = matrix[r, c];
matrix[r, c] = matrix[c, x];
matrix[c, x] = t;
break;
}
}
}
}
return(true);
}
