!  
!   This program computes the transmittance of a system and/or its
!   complex band structure. 
!   It is controlled through the following variables 
!   in the namelist inputcond:
!
! outdir      temporary directory (as in PWscf)
! prefixt     prefix for the file (as in PWscf) containing all the
!             regions (left lead + scatt. reg. + right lead)
! prefixl     prefix for the file containing only the
!             left lead
! prefixs     prefix for the file containing the
!             scattering region
! prefixr     prefix for the file containing only the
!             right lead
! band_file   file on which the complex bands are saved
! tran_file   file where the transmission is written
! save_file   file where the data necessary for PWCOND are written
!             so that no prefix files of PW are longer needed
! fil_loc     file on/from which the 2D eigenvalue problem data
!             are saved/read 
! lwrite_cond if .t. save the data necessary for PWCOND in save_file
! lread_cond  if .t. read the data necessary for PWCOND from save_file
! lwrite_loc  if .t. save 2D eigenvalue problem result in fil_loc
! lread_loc   if .t. read 2D eigenvalue problem result from fil_loc
! ikind       the kind of conductance calculation:
!             ikind=0  - just complex band structure (CBS) calculation
!             ikind=1  - conductance calculation with identical 
!                        left and right leads
!             ikind=2  - conductance calculation with different
!                        left and right leads       
! iofspin     spin index for which the calculations are performed
! llocal      if .t. calculations are done with only local part of PP 
! bdl         right boundary of the left lead (left one is supposed to be at 0) 
! bds         right boundary of the scatt. reg. (left one is at 0 if prefixs
!             is used and = bdl if prefixt is used) 
! bdr         right boundary of the right lead (left one is at 0 if prefixr
!             is used and = bds if prefixt is used) 
! nz1         the number of subslabs in the slab (to calculate integrals)
! energy0     initial energy 
! denergy     energy step (if denergy=0.0 the energy is read from the list)
! nenergy     number of energies 
!             WARNING: the energy in input file is given in eV taken from Ef,
!                      and denergy should be negative
! ecut2d      2-D cutoff
! ewind       the energy window for reduction of 2D plane wave basis set (in XY)
! epsproj     accuracy of 2D basis set reduction
! orbj_in     the initial orbital for projecting the transmission 
! orbj_fin    the final orbital for projecting the transmission 
!
!
!  Cards after the namelist:
!
!   Number of k_\perp points
!   kx, ky, weight
!   number of energy points
!