/// <summary>
/// A low-Performance method to permute the affine part of some operator according to the GlobalID-permutation;
/// </summary>
/// <param name="Affine"></param>
/// <param name="grd"></param>
/// <param name="RowMap"></param>
/// <returns></returns>
/// <remarks>
/// Low-Performance implementation, only for debugging purposes.
/// </remarks>
public static IList <double> ResortAffine(this IList <double> Affine, GridData grd, UnsetteledCoordinateMapping RowMap)
{
if (RowMap.LocalLength != Affine.Count)
{
throw new ArgumentException();
}
// Copy values of Affine to diagonal matrix
MsrMatrix Matrix = new MsrMatrix(RowMap, RowMap);
int i0 = RowMap.i0;
for (int row = 0; row < RowMap.LocalLength; row++)
{
Matrix[i0 + row, i0 + row] = Affine[row];
}
// Permute matrix
MsrMatrix MatrixPermuted = Matrix.ResortMatrix(grd, RowMap, RowMap);
// Copy values from permuted matrix to permuted affine
IList <double> AffinePermuted = new double[Affine.Count];
for (int row = 0; row < RowMap.LocalLength; row++)
{
AffinePermuted[row] = MatrixPermuted[i0 + row, i0 + row];
}
return(AffinePermuted);
}
