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quantum-espresso/Modules/xsf.f90

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!
! Copyright (C) 2003 Tone Kokalj
! This file is distributed under the terms of the
! GNU General Public License. See the file `License'
! in the root directory of the present distribution,
! or http://www.gnu.org/copyleft/gpl.txt .
!
! This file holds XSF (=Xcrysden Structure File) utilities.
! Routines written by Tone Kokalj on Mon Jan 27 18:51:17 CET 2003
!
!-------------------------------------------------------------------
SUBROUTINE xsf_struct (alat, at, nat, tau, atm, ityp, ounit)
!-------------------------------------------------------------------
!! This routine writes the crystal structure in XSF format.
!
USE kinds, ONLY : DP
USE constants, ONLY : BOHR_RADIUS_ANGS
IMPLICIT NONE
INTEGER :: nat, ityp (nat), ounit
CHARACTER(len=*) :: atm(*)
real(DP) :: alat, tau (3, nat), at (3, 3)
! --
INTEGER :: i, j, n
real(DP) :: at1 (3, 3)
! convert lattice vectors to ANGSTROM units ...
DO i=1,3
DO j=1,3
at1(j,i) = at(j,i)*alat*BOHR_RADIUS_ANGS
ENDDO
ENDDO
WRITE(ounit,*) 'CRYSTAL'
WRITE(ounit,*) 'PRIMVEC'
WRITE(ounit,'(2(3F15.9/),3f15.9)') at1
WRITE(ounit,*) 'PRIMCOORD'
WRITE(ounit,*) nat, 1
DO n=1,nat
! positions are in Angstroms
WRITE(ounit,'(a3,3x,3f15.9)') atm(ityp(n)), &
tau(1,n)*alat*BOHR_RADIUS_ANGS, &
tau(2,n)*alat*BOHR_RADIUS_ANGS, &
tau(3,n)*alat*BOHR_RADIUS_ANGS
ENDDO
RETURN
END SUBROUTINE xsf_struct
!-------------------------------------------------------------------
SUBROUTINE xsf_fast_datagrid_3d &
(rho, nr1, nr2, nr3, nr1x, nr2x, nr3x, at, alat, ounit)
!-------------------------------------------------------------------
!! This routine writes the 3D scalar field (i.e. uniform mesh of points)
!! in XSF format using the FFT mesh (i.e. fast write).
!
USE kinds, ONLY : DP
USE constants, ONLY : BOHR_RADIUS_ANGS
IMPLICIT NONE
INTEGER :: nr1x, nr2x, nr3x, nr1, nr2, nr3, ounit
real(DP) :: alat, at (3, 3), rho(nr1x,nr2x,nr3x)
! --
INTEGER :: i1, i2, i3, ix, iy, iz, count, i, &
ind_x(10), ind_y(10),ind_z(10)
! XSF scalar-field header
WRITE(ounit,'(a)') 'BEGIN_BLOCK_DATAGRID_3D'
WRITE(ounit,'(a)') '3D_PWSCF'
WRITE(ounit,'(a)') 'BEGIN_DATAGRID_3D_UNKNOWN'
! number of points in each direction
WRITE(ounit,*) nr1+1, nr2+1, nr3+1
! origin
WRITE(ounit,'(3f10.6)') 0.0d0, 0.0d0, 0.0d0
! 1st spanning (=lattice) vector
WRITE(ounit,'(3f12.6)') (BOHR_RADIUS_ANGS*alat*at(i,1),i=1,3) ! in ANGSTROMS
! 2nd spanning (=lattice) vector
WRITE(ounit,'(3f12.6)') (BOHR_RADIUS_ANGS*alat*at(i,2),i=1,3)
! 3rd spanning (=lattice) vector
WRITE(ounit,'(3f12.6)') (BOHR_RADIUS_ANGS*alat*at(i,3),i=1,3)
count=0
DO i3=0,nr3
!iz = mod(i3,nr3)
iz = mod(i3,nr3) + 1
DO i2=0,nr2
!iy = mod(i2,nr2)
iy = mod(i2,nr2) + 1
DO i1=0,nr1
!ix = mod(i1,nr1)
ix = mod(i1,nr1) + 1
!ii = (1+ix) + iy*nr1x + iz*nr1x*nr2x
IF (count<6) THEN
count = count + 1
!ind(count) = ii
ELSE
WRITE(ounit,'(6e14.6)') &
(rho(ind_x(i),ind_y(i),ind_z(i)),i=1,6)
count=1
!ind(count) = ii
ENDIF
ind_x(count) = ix
ind_y(count) = iy
ind_z(count) = iz
ENDDO
ENDDO
ENDDO
WRITE(ounit,'(6e14.6:)') (rho(ind_x(i),ind_y(i),ind_z(i)),i=1,count)
WRITE(ounit,'(a)') 'END_DATAGRID_3D'
WRITE(ounit,'(a)') 'END_BLOCK_DATAGRID_3D'
RETURN
END SUBROUTINE xsf_fast_datagrid_3d
SUBROUTINE xsf_datagrid_2d (rho, nx, ny, m1, m2, x0, e1, e2, alat, ounit)
USE kinds, ONLY : DP
USE constants, ONLY : BOHR_RADIUS_ANGS
IMPLICIT NONE
INTEGER :: nx, ny, ounit
real(DP) :: m1, m2, alat, x0(3), e1(3), e2(3), rho(2, nx, ny)
! --
INTEGER :: ix, iy, count, i, ind_x(10), ind_y(10)
! XSF scalar-field header
WRITE(ounit,'(a)') 'BEGIN_BLOCK_DATAGRID_2D'
WRITE(ounit,'(a)') '2D_PWSCF'
WRITE(ounit,'(a)') 'DATAGRID_2D_UNKNOWN'
! number of points in each direction
WRITE(ounit,*) nx, ny
! origin
WRITE(ounit,'(3f10.6)') (BOHR_RADIUS_ANGS*alat*x0(i),i=1,3) ! in ANGSTROMS
! 1st spanning (=lattice) vector
WRITE(ounit,'(3f10.6)') (BOHR_RADIUS_ANGS*alat*e1(i)*m1,i=1,3) ! in ANGSTROMS
! 2nd spanning (=lattice) vector
WRITE(ounit,'(3f10.6)') (BOHR_RADIUS_ANGS*alat*e2(i)*m2,i=1,3) ! in ANGSTROMS
count=0
DO iy=1,ny
DO ix=1,nx
IF (count < 6) THEN
count = count + 1
ELSE
WRITE(ounit,'(6e14.6)') (rho(1,ind_x(i),ind_y(i)),i=1,6)
count=1
ENDIF
ind_x(count) = ix
ind_y(count) = iy
ENDDO
ENDDO
WRITE(ounit,'(6e14.6:)') (rho(1,ind_x(i),ind_y(i)),i=1,count)
WRITE(ounit,'(a)') 'END_DATAGRID_2D'
WRITE(ounit,'(a)') 'END_BLOCK_DATAGRID_2D'
RETURN
END SUBROUTINE xsf_datagrid_2d
SUBROUTINE xsf_datagrid_3d &
(rho, nx, ny, nz, m1, m2, m3, x0, e1, e2, e3, alat, ounit)
USE kinds, ONLY : DP
USE constants, ONLY : BOHR_RADIUS_ANGS
IMPLICIT NONE
INTEGER :: nx, ny, nz, ounit
real(DP) :: m1, m2, m3, alat, x0(3), e1(3),e2(3),e3(3), rho(nx, ny, nz)
! --
INTEGER :: ix, iy, iz, count, i, ind_x(10), ind_y(10), ind_z(10)
! XSF scalar-field header
WRITE(ounit,'(a)') 'BEGIN_BLOCK_DATAGRID_3D'
WRITE(ounit,'(a)') '3D_PWSCF'
WRITE(ounit,'(a)') 'DATAGRID_3D_UNKNOWN'
! number of points in each direction
WRITE(ounit,*) nx, ny, nz
! origin
WRITE(ounit,'(3f10.6)') (BOHR_RADIUS_ANGS*alat*x0(i),i=1,3) ! in ANGSTROMS
! 1st spanning (=lattice) vector
WRITE(ounit,'(3f10.6)') (BOHR_RADIUS_ANGS*alat*e1(i)*m1,i=1,3) ! in ANGSTROMS
! 2nd spanning (=lattice) vector
WRITE(ounit,'(3f10.6)') (BOHR_RADIUS_ANGS*alat*e2(i)*m2,i=1,3) ! in ANGSTROMS
! 3rd spanning (=lattice) vector
WRITE(ounit,'(3f10.6)') (BOHR_RADIUS_ANGS*alat*e3(i)*m3,i=1,3)
count=0
DO iz=1,nz
DO iy=1,ny
DO ix=1,nx
IF (count<6) THEN
count = count + 1
ELSE
WRITE(ounit,'(6e14.6)') (rho(ind_x(i),ind_y(i),ind_z(i)),i=1,6)
count=1
ENDIF
ind_x(count) = ix
ind_y(count) = iy
ind_z(count) = iz
ENDDO
ENDDO
ENDDO
WRITE(ounit,'(6e14.6:)') (rho(ind_x(i),ind_y(i),ind_z(i)),i=1,count)
WRITE(ounit,'(a)') 'END_DATAGRID_3D'
WRITE(ounit,'(a)') 'END_BLOCK_DATAGRID_3D'
RETURN
END SUBROUTINE xsf_datagrid_3d
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