RFLO_ReadGridRegion.F90

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!******************************************************************************
!
! Purpose: read in x-,y-,z-coordinates of grid nodes for one region.
!
! Description: the following grid formats are supported:
!              - RocfloMP ASCII
!              - RocfloMP binary.
!
! Input: regions = dimensions of all regions
!        iReg    = region number.
!
! Output: region%levels%grid%xyz = grid coordinates
!         global%currentTime     = physical time
!
! Notes: additionaly, physical time is read in, which is stored at
!        the beginning of the file (meaningful only in the case of unsteady
!        flow and dynamic grids). It is the finest grid, which is read in.
!        There is no transfer of data to other processors.
!
!******************************************************************************
!
! $Id: RFLO_ReadGridRegion.F90,v 1.3 2008/12/06 08:44:07 mtcampbe Exp $
!
! Copyright: (c) 2001 by the University of Illinois
!
!******************************************************************************

SUBROUTINE rflo_readgridregion( iReg,regions )

  USE moddatatypes
  USE moddatastruct, ONLY : t_region
  USE modglobal, ONLY     : t_global
  USE modinterfaces, ONLY : rflo_readdatafileint, rflo_readdatafilereal, &
                            rflo_getdimensphysnodes, rflo_getnodeoffset
  USE moderror
  USE modparameters
  IMPLICIT NONE

#include "Indexing.h"

! ... parameters
  INTEGER :: ireg

  TYPE(t_region), POINTER :: regions(:)

! ... loop variables
  INTEGER :: i, j, k, n

! ... local variables
  CHARACTER(2*CHRLEN+17) :: fname
  CHARACTER(CHRLEN)      :: msg

  INTEGER :: iregfile, ipc, jpc, kpc, ndim
  INTEGER :: ipnbeg, ipnend, jpnbeg, jpnend, kpnbeg, kpnend
  INTEGER :: inoff, ijnoff, ijkn, errorflag
  INTEGER, ALLOCATABLE :: ivar(:,:)

  LOGICAL :: movegrid

  REAL(RFREAL), POINTER     :: xyz(:,:)
  REAL(RFREAL), ALLOCATABLE :: rvar(:,:), xyzfile(:,:)

  TYPE(t_global), POINTER :: global

!******************************************************************************

  global => regions(ireg)%global

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

! allocate fixed-size temporary data arrays -----------------------------------

  ALLOCATE( ivar(4,1),stat=errorflag )
  ALLOCATE( rvar(1,1),stat=errorflag )
  global%error = errorflag
  IF (global%error /= 0) CALL errorstop( global,err_allocate,__line__ )

! open grid file (only if iReg=1) ---------------------------------------------

  IF (ireg == 1) THEN

    movegrid = .false.
    DO iregfile=1,global%nRegions
      IF (regions(iregfile)%mixtInput%moveGrid) movegrid = .true.
    ENDDO

! - unsteady flow

    IF (global%flowType==flow_unsteady .AND. &
        movegrid .AND. global%timeStamp>0._rfreal) THEN
      IF (global%gridFormat == format_ascii) THEN
        WRITE(fname,'(A,1PE11.5)') trim(global%inDir)//trim(global%casename)//'.grda_', &
                                   global%timeStamp
        OPEN(if_grid,file=fname,form='formatted',status='old',iostat=errorflag)
      ELSE IF (global%gridFormat == format_binary) THEN
        WRITE(fname,'(A,1PE11.5)') trim(global%inDir)//trim(global%casename)//'.grdb_', &
                                   global%timeStamp
        OPEN(if_grid,file=fname,form='unformatted',status='old',iostat=errorflag)
      ELSE
        CALL errorstop( global,err_unknown_format,__line__ )
      ENDIF

! - steady flow

    ELSE
      IF (global%gridFormat == format_ascii) THEN
        WRITE(fname,'(A)') trim(global%inDir)//trim(global%casename)//'.grda'
        OPEN(if_grid,file=fname,form='formatted',status='old',iostat=errorflag)
      ELSE IF (global%gridFormat == format_binary) THEN
        WRITE(fname,'(A)') trim(global%inDir)//trim(global%casename)//'.grdb'
        OPEN(if_grid,file=fname,form='unformatted',status='old',iostat=errorflag)
      ELSE
        CALL errorstop( global,err_unknown_format,__line__ )
      ENDIF
    ENDIF

    global%error = errorflag
    IF (global%error /= 0) &
      CALL errorstop( global,err_file_open,__line__,'File: '//trim(fname) )

! - read time

    CALL rflo_readdatafilereal( global,if_grid,global%gridFormat,1,1,rvar )
    global%currentTime = rvar(1,1)

  ENDIF   ! 1st region

! read grid data --------------------------------------------------------------
! read region number and dimensions

  CALL rflo_readdatafileint( global,if_grid,global%gridFormat,4,1,ivar )
  iregfile = ivar(1,1)
  ipc      = ivar(2,1)
  jpc      = ivar(3,1)
  kpc      = ivar(4,1)

  IF (iregfile /= ireg) &
    CALL errorstop( global,err_region_number,__line__,'File: '//trim(fname) )
  IF ((ipc /= regions(ireg)%levels(1)%grid%ipc) .OR. &
      (jpc /= regions(ireg)%levels(1)%grid%jpc) .OR. &
      (kpc /= regions(ireg)%levels(1)%grid%kpc)) THEN
    WRITE(msg,1000) ireg,ipc,jpc,kpc
    CALL errorstop( global,err_grid_dimensions,__line__,msg )
  ENDIF

! read data

  ndim = (ipc+1)*(jpc+1)*(kpc+1)
  ALLOCATE( xyzfile(3,ndim),stat=errorflag )
  global%error = errorflag
  IF (global%error /= 0) CALL errorstop( global,err_allocate,__line__ )

  CALL rflo_readdatafilereal( global,if_grid,global%gridFormat,3,ndim,xyzfile )

! copy grid into data structure

  CALL rflo_getdimensphysnodes( regions(ireg),1,ipnbeg,ipnend, &
                                jpnbeg,jpnend,kpnbeg,kpnend )
  CALL rflo_getnodeoffset( regions(ireg),1,inoff,ijnoff )
  xyz => regions(ireg)%levels(1)%grid%xyz

  n = 0
  DO k=kpnbeg,kpnend
    DO j=jpnbeg,jpnend
      DO i=ipnbeg,ipnend
        n    = n + 1
        ijkn = indijk(i,j,k,inoff,ijnoff)
        xyz(xcoord,ijkn) = xyzfile(1,n)
        xyz(ycoord,ijkn) = xyzfile(2,n)
        xyz(zcoord,ijkn) = xyzfile(3,n)
      ENDDO
    ENDDO
  ENDDO

  DEALLOCATE( xyzfile,stat=errorflag )
  global%error = errorflag
  IF (global%error /= 0) CALL errorstop( global,err_deallocate,__line__ )

! finalize --------------------------------------------------------------------

  IF (ireg == global%nRegions) THEN
    CLOSE(if_grid,iostat=errorflag)
    global%error = errorflag
    IF (global%error /= 0) &
      CALL errorstop( global,err_file_close,__line__,'File: '//trim(fname) )
  ENDIF

  CALL deregisterfunction( global )

1000 FORMAT('Region ',i5,', ipc= ',i6,', jpc= ',i6,', kpc= ',i6,'.')

END SUBROUTINE rflo_readgridregion

!******************************************************************************
!
! RCS Revision history:
!
! $Log: RFLO_ReadGridRegion.F90,v $
! Revision 1.3  2008/12/06 08:44:07  mtcampbe
! Updated license.
!
! Revision 1.2  2008/11/19 22:17:21  mtcampbe
! Added Illinois Open Source License/Copyright
!
! Revision 1.1  2004/11/29 21:25:16  wasistho
! lower to upper case
!
! Revision 1.10  2003/11/20 16:40:34  mdbrandy
! Backing out RocfluidMP changes from 11-17-03
!
! Revision 1.7  2003/05/15 02:57:01  jblazek
! Inlined index function.
!
! Revision 1.6  2002/10/23 18:43:24  jblazek
! Changed temporary pointer arrays into allocatable arrays
! in grid and solution I/O routines.
!
! Revision 1.5  2002/10/12 03:20:50  jblazek
! Replaced [io]stat=global%error with local errorFlag for Rocflo.
!
! Revision 1.4  2002/09/20 22:22:35  jblazek
! Finalized integration into GenX.
!
! Revision 1.3  2002/09/05 17:40:19  jblazek
! Variable global moved into regions().
!
! Revision 1.2  2002/08/29 21:52:21  jblazek
! Added I/O of grid speeds.
!
! Revision 1.1  2002/06/07 16:40:36  jblazek
! Grid & solution for all regions in one file.
!
!******************************************************************************