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Convert

Convert method changes the storage pattern of matrix.

Interface 1​

 INTERFACE
  MODULE PURE SUBROUTINE convert(From, To, Conversion, nns, tdof)
    REAL(DFP), INTENT(IN) :: From(:, :)
    !! Matrix in one format
    REAL(DFP), INTENT(INOUT), ALLOCATABLE :: To(:, :)
    !! Matrix is desired format
    INTEGER(I4B), INTENT(IN) :: Conversion
    !! `Conversion` can be `NodesToDOF` or `DOFToNodes`
    INTEGER(I4B), INTENT(IN) :: nns, tdof
  END SUBROUTINE convert
END INTERFACE

This subroutine changes the storage pattern of a 2D matrix.

  • Usually element matrix in easifem are stored in FMT_DOF
  • Global matrices/tanmat, however, are stored in FMT_Nodes
note

All dof should have the same order of interpolation, therefore, this routine works when matrix is square.

Interface 2​

 INTERFACE
  MODULE PURE SUBROUTINE convert(From, To)
    REAL(DFP), INTENT(IN) :: From(:, :, :, :)
    REAL(DFP), ALLOCATABLE, INTENT(INOUT) :: To(:, :)
  END SUBROUTINE convert
END INTERFACE

This subroutine converts a rank-4 matrix to rank-2 matrix.

Interface 3​

INTERFACE
  MODULE PURE SUBROUTINE convert(From, To)
    REAL(DFP), INTENT(IN) :: From(:, :, :, :, :, :)
  !! I, J, ii, jj, a, b
    REAL(DFP), ALLOCATABLE, INTENT(INOUT) :: To(:, :, :, :)
  !! I, J, a, b
  END SUBROUTINE convert
END INTERFACE

This subroutine converts a rank-6 matrix to rank-4 matrix.