symvec.f90

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! Copyright (C) 2017 J. K. Dewhurst, S. Sharma and E. K. U. Gross.
! This file is distributed under the terms of the GNU General Public License.
! See the file COPYING for license details.
 
subroutine symvec(vc)
use modmain
implicit none
! arguments
real(8), intent(inout) :: vc(3)
! local variables
integer isym,lspl
real(8) vs(3),v(3),t1
! make symmetric average
vs(1:3)=0.d0
do isym=1,nsymcrys
  lspl=lsplsymc(isym)
  call r3mv(symlatc(:,:,lspl),vc,v)
  vs(1:3)=vs(1:3)+v(1:3)
end do
! normalise
t1=1.d0/dble(nsymcrys)
vc(1:3)=t1*vs(1:3)
end subroutine