private static void Transpose <T>(ISquareMatrix <T> matrix)
{
for (int row = 0; row < matrix.GetSize() - 1; row++)
{
for (int col = row + 1; col < matrix.GetSize(); col++)
{
Swap(ref matrix.At(row, col), ref matrix.At(col, row));
}
}
}
public static void Rotate90DegreesClockwise <T>(ISquareMatrix <T> matrix)
{
Transpose(matrix);
// Mirror left to right
for (int row = 0; row < matrix.GetSize(); row++)
{
for (int col = 0; col < matrix.GetSize() / 2; col++)
{
Swap(ref matrix.At(row, col), ref matrix.At(row, matrix.GetSize() - 1 - col));
}
}
}
public static void Rotate90DegreesCounterclockwise <T>(ISquareMatrix <T> matrix)
{
Transpose(matrix);
// Mirror top to bottom
for (int col = 0; col < matrix.GetSize(); col++)
{
for (int row = 0; row < matrix.GetSize() / 2; row++)
{
Swap(ref matrix.At(row, col), ref matrix.At(matrix.GetSize() - 1 - row, col));
}
}
}