Same as evalDiff_forPoint except it evaluate diff from points via index which are setup before hand
The interface has to comply to the abstract interface tem_varSys_module#tem_varSys_proc_point
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| class(tem_varSys_op_type), | intent(in) | :: | fun |
Description of the method to obtain the variables, here some preset values might be stored, like the space time function to use or the required variables. |
||
| type(tem_varSys_type), | intent(in) | :: | varSys |
The variable system to obtain the variable from. |
||
| type(tem_time_type), | intent(in) | :: | time |
Point in time at which to evaluate the variable. |
||
| integer, | intent(in) | :: | iLevel |
Level on which values are requested |
||
| integer, | intent(in) | :: | idx(:) |
Index of points in the growing array and variable val array to return. Size: nVals |
||
| integer, | intent(in), | optional | :: | idxLen(:) |
With idx as start index in contiguous memory, idxLength defines length of each contiguous memory Size: nVals |
|
| integer, | intent(in) | :: | nVals |
Number of values to obtain for this variable (vectorized access). |
||
| real(kind=rk), | intent(out) | :: | res(:) |
Resulting values for the requested variable. Dimension: n requested entries x nComponents of this variable Access: (iElem-1)*fun%nComponents + iComp |
recursive subroutine evalDiff_fromIndex( fun, varSys, time, iLevel, idx, &
& idxLen, nVals, res )
! ---------------------------------------------------------------------- !
!> Description of the method to obtain the variables, here some preset
!! values might be stored, like the space time function to use or the
!! required variables.
class(tem_varSys_op_type), intent(in) :: fun
!> The variable system to obtain the variable from.
type(tem_varSys_type), intent(in) :: varSys
!> Point in time at which to evaluate the variable.
type(tem_time_type), intent(in) :: time
!> Level on which values are requested
integer, intent(in) :: iLevel
!> Index of points in the growing array and variable val array to
!! return.
!! Size: nVals
integer, intent(in) :: idx(:)
!> With idx as start index in contiguous memory,
!! idxLength defines length of each contiguous memory
!! Size: nVals
integer, optional, intent(in) :: idxLen(:)
!> Number of values to obtain for this variable (vectorized access).
integer, intent(in) :: nVals
!> Resulting values for the requested variable.
!!
!! Dimension: n requested entries x nComponents of this variable
!! Access: (iElem-1)*fun%nComponents + iComp
real(kind=rk), intent(out) :: res(:)
! ---------------------------------------------------------------------- !
integer :: iDep, posDepVar
! first dimension:nElems,
! second dimension:size of difference variable in input_varname
real(kind=rk), allocatable :: input_varRes(:,:)
! ---------------------------------------------------------------------- !
type(tem_varSys_op_data_type), pointer :: opData
integer :: nTotal
! ---------------------------------------------------------------------- !
call C_F_POINTER( fun%method_Data, opData )
! check if number of index are the same as number of values asked for
call tem_varSys_check_inArgs( fun, varSys, time, iLevel, idx, idxLen, &
& nVals, label = 'evalDiff_fromIndex' )
nTotal = nVals*fun%nComponents
! nInputs must be two
allocate(input_varRes(nTotal, fun%nInputs))
do iDep = 1, fun%nInputs
! get position of dependent var in varSys
posDepVar = fun%input_varPos(iDep)
! derive dependent variable for indices
!rent derive dependent variable
call varSys%method%val(posDepVar)%get_valOfIndex( &
& varSys = varSys, &
& time = time, &
& iLevel = iLevel, &
& idx = opData%input_pntIndex(iDep) &
& %indexLvl(iLevel)%val( idx(:) ), &
& nVals = nVals, &
& res = input_varRes(:,iDep) )
end do
res(:nTotal) = input_varRes(:, 1) - input_varRes(:, 2)
deallocate(input_varRes)
end subroutine evalDiff_fromIndex