!-----------------------------------------------------------------------------------------------------------------------------------
! This file is part of ReMKiT1D.
!
! ReMKiT1D is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as
! published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
!
! ReMKiT1D is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
!
! You should have received a copy of the GNU General Public License along with ReMKiT1D. If not, see <https://www.gnu.org/licenses/>.
!
! Copyright 2023 United Kingdom Atomic Energy Authority (stefan.mijin@ukaea.uk)
!-----------------------------------------------------------------------------------------------------------------------------------
module lin_extrapolation_class
!! author: Stefan Mijin
!!
!! Houses linear Extrapolation object
use data_kinds ,only: rk, ik
use runtime_constants ,only: debugging, assertions
use god_objects ,only: Object
use assertion_utility ,only: assert, assertIdentical, assertPure
use partition_class ,only: Partition
use grid_class ,only: Grid
use geometry_class ,only: Geometry
use extrapolation_abstract_class ,only: Extrapolation
implicit none
private
type ,public ,extends(Extrapolation) :: LinExtrapolation
!! Linear extrapolation object
real(rk) ,private :: linExterp !! Linear extrapolation coefficient used
integer(ik) ,dimension(2) :: exterpCoords !! Coordinates used for extrapolation. Should be the indices of the data closest and second closest to the boundary, respectively.
contains
procedure ,public :: init => initLinExtrap
procedure ,public :: extrapolate => extrapolateLin
end type LinExtrapolation
!-----------------------------------------------------------------------------------------------------------------------------------
interface
!-----------------------------------------------------------------------------------------------------------------------------------
module subroutine initLinExtrap(this,partObj,gridObj,numProc,haloWidth,geometryObj,leftBoundary,staggeredVars)
!! Initialization routine for LinExtrapolation object
class(LinExtrapolation) ,intent(inout) :: this
type(Partition) ,intent(in) :: partObj
type(Grid) ,intent(in) :: gridObj
integer(ik) ,intent(in) :: numProc
integer(ik) ,intent(in) :: haloWidth
type(Geometry) ,intent(in) :: geometryObj
logical ,intent(in) :: leftBoundary
logical ,intent(in) :: staggeredVars
end subroutine initLinExtrap
!-----------------------------------------------------------------------------------------------------------------------------------
pure module function extrapolateLin(this,input) result(res)
!! Linear extrapolation
class(LinExtrapolation) ,intent(in) :: this
real(rk) ,dimension(:) ,intent(in) :: input
real(rk) :: res
end function extrapolateLin
!-----------------------------------------------------------------------------------------------------------------------------------
end interface
!-----------------------------------------------------------------------------------------------------------------------------------
end module lin_extrapolation_class
!-----------------------------------------------------------------------------------------------------------------------------------
