!-------------------------------------- LICENCE BEGIN ------------------------------------
!Environment Canada - Atmospheric Science and Technology License/Disclaimer,
!                     version 3; Last Modified: May 7, 2008.
!This is free but copyrighted software; you can use/redistribute/modify it under the terms
!of the Environment Canada - Atmospheric Science and Technology License/Disclaimer
!version 3 or (at your option) any later version that should be found at:
!http://collaboration.cmc.ec.gc.ca/science/rpn.comm/license.html
!
!This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
!without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
!See the above mentioned License/Disclaimer for more details.
!You should have received a copy of the License/Disclaimer along with this software;
!if not, you can write to: EC-RPN COMM Group, 2121 TransCanada, suite 500, Dorval (Quebec),
!CANADA, H9P 1J3; or send e-mail to service.rpn@ec.gc.ca
!-------------------------------------- LICENCE END --------------------------------------
!
C
C  X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X
C

      subroutine suwvnb_rpn 1
!
!*** suwvnb_rpn  - Initializes RPN 2D DFT spectral components counters and wavenumbers
!
! AUTHOR: Luc Fillion - 2 Nov 2004.
!
! MODIFICATIONS.
! Luc Fillion - ARMA/EC - 23 Jan 2008.
! Luc Fillion - ARMA/EC - 26 Jan 2010. Limit computations of wavenumbers only to those actually desired
!                           i.e. based on ntrunc.
!
! Arguments:
*implicits
      IMPLICIT NONE
#include "taglam4d.cdk"
#include "comlun.cdk"
#include "comdim.cdk"
#include "comfftla.cdk"
#include "comsp.cdk"
!
      integer ila,iwvnbx,iwvnby,ji,jj
      integer imaxi,imaxj
      real*8 zrest
!
!!
      ila=0
      iwvnbx=-1
!
      do ji=1,2*ntrunc+2
        zrest = mod(ji,2)
        if(zrest.ne.0.) iwvnbx=iwvnbx+1
        iwvnby=-1
        do jj=1,2*ntrunc+2
          zrest = mod(jj,2)
          if(zrest.ne.0.) iwvnby=iwvnby+1
          ila=ila+1
          mwvnbx(ila)=iwvnbx
          mwvnby(ila)=iwvnby
          nindxy_rpn(ji,jj) = ila
        enddo
      enddo
!
      return
      end