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qp2/src/casscf_cipsi/reorder_orb.irp.f

71 lines
1.6 KiB
Fortran
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2023-06-18 21:42:40 +02:00
subroutine reorder_orbitals_for_casscf
implicit none
BEGIN_DOC
! routine that reorders the orbitals of the CASSCF in terms block of core, active and virtual
END_DOC
integer :: i,j,iorb
integer, allocatable :: iorder(:),array(:)
allocate(iorder(mo_num),array(mo_num))
do i = 1, n_core_orb
iorb = list_core(i)
array(iorb) = i
enddo
do i = 1, n_inact_orb
iorb = list_inact(i)
array(iorb) = mo_num + i
enddo
do i = 1, n_act_orb
iorb = list_act(i)
array(iorb) = 2 * mo_num + i
enddo
do i = 1, n_virt_orb
iorb = list_virt(i)
array(iorb) = 3 * mo_num + i
enddo
do i = 1, mo_num
iorder(i) = i
enddo
call isort(array,iorder,mo_num)
double precision, allocatable :: mo_coef_new(:,:)
allocate(mo_coef_new(ao_num,mo_num))
do i = 1, mo_num
mo_coef_new(:,i) = mo_coef(:,iorder(i))
enddo
mo_coef = mo_coef_new
touch mo_coef
list_core_reverse = 0
do i = 1, n_core_orb
list_core(i) = i
list_core_reverse(i) = i
mo_class(i) = "Core"
enddo
list_inact_reverse = 0
do i = 1, n_inact_orb
list_inact(i) = i + n_core_orb
list_inact_reverse(i+n_core_orb) = i
mo_class(i+n_core_orb) = "Inactive"
enddo
list_act_reverse = 0
do i = 1, n_act_orb
list_act(i) = n_core_inact_orb + i
list_act_reverse(n_core_inact_orb + i) = i
mo_class(n_core_inact_orb + i) = "Active"
enddo
list_virt_reverse = 0
do i = 1, n_virt_orb
list_virt(i) = n_core_inact_orb + n_act_orb + i
list_virt_reverse(n_core_inact_orb + n_act_orb + i) = i
mo_class(n_core_inact_orb + n_act_orb + i) = "Virtual"
enddo
touch list_core_reverse list_core list_inact list_inact_reverse list_act list_act_reverse list_virt list_virt_reverse
end