RkInitPointScalar.F90

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!******************************************************************************
!
! Purpose: Initialize Runge-Kutta scheme particle velocity computations.
!
! Description: None.
!
! Input: 
!   region      Region data
!   iStage      Runge-Kutta stage
!   ivBeg       Beginning index for variable update
!   ivEnd       Ending index for variable update
!   var         Conserved variables
!   varOld      Old variables
!
! Output: 
!   varOld      Old variables
!
! Notes: None.
!
!******************************************************************************
!
! $Id: RkInitPointScalar.F90,v 1.3 2008/12/06 08:44:10 mtcampbe Exp $
!
! Copyright: (c) 2005 by the University of Illinois
!
! ******************************************************************************

SUBROUTINE rkinitpointscalar(region,iStage,ivBeg,ivEnd,var,varOld)

  USE moddatatypes
  USE moddatastruct, ONLY: t_region
  USE modglobal, ONLY: t_global
  USE moderror
  USE modparameters
  
  IMPLICIT NONE

! *****************************************************************************
! Definitions and declarations
! *****************************************************************************

! =============================================================================
! Arguments
! =============================================================================

  INTEGER, INTENT(IN) :: istage,ivbeg,ivend
  REAL(RFREAL), DIMENSION(:), POINTER :: var,varold
  TYPE(t_region) :: region

! =============================================================================
! Locals
! =============================================================================

  CHARACTER(CHRLEN) :: rcsidentstring
  INTEGER :: iv
  TYPE(t_global), POINTER :: global
  
! *****************************************************************************
! Start
! *****************************************************************************

  global => region%global

  CALL registerfunction(global,'RkInitPointScalar',&
  'RkInitPointScalar.F90')

! *****************************************************************************
! Initialize Runge-Kutta scheme
! *****************************************************************************

  SELECT CASE ( global%rkScheme ) 
  CASE ( rk_scheme_4_classical ) 
    IF ( istage == 1 ) THEN
      DO iv = ivbeg,ivend
        varold(iv) = var(iv) 
      END DO ! iv
    END IF ! iStage
  CASE ( rk_scheme_3_wray ) 
    DO iv = ivbeg,ivend
      varold(iv) = var(iv) 
    END DO ! iv
  CASE default
    CALL errorstop(global,err_reached_default,__line__)
  END SELECT ! global%rkScheme

! *****************************************************************************
! End
! *****************************************************************************

  CALL deregisterfunction(global)

END SUBROUTINE rkinitpointscalar

! ******************************************************************************
!
! RCS Revision history:
!
! $Log: RkInitPointScalar.F90,v $
! Revision 1.3  2008/12/06 08:44:10  mtcampbe
! Updated license.
!
! Revision 1.2  2008/11/19 22:17:23  mtcampbe
! Added Illinois Open Source License/Copyright
!
! Revision 1.1  2006/08/19 15:37:30  mparmar
! Initial revision
!
! ******************************************************************************