c---------------------------------------------------------------------
c---------------------------------------------------------------------
      subroutine setiv

c---------------------------------------------------------------------
c---------------------------------------------------------------------

c---------------------------------------------------------------------
c
c   set the initial values of independent variables based on tri-linear
c   interpolation of boundary values in the computational space.
c
c---------------------------------------------------------------------

      implicit none

      include 'applu.incl'

c---------------------------------------------------------------------
c  local variables
c---------------------------------------------------------------------
      integer i, j, k, m
      integer iglob, jglob
      double precision  xi, eta, zeta
      double precision  pxi, peta, pzeta
      double precision  ue_1jk(5),ue_nx0jk(5),ue_i1k(5),
     >        ue_iny0k(5),ue_ij1(5),ue_ijnz(5)


      do k = 2, nz - 1
         zeta = ( dble (k-1) ) / (nz-1)
         do j = 1, ny
          jglob = jpt + j
          IF (jglob.ne.1.and.jglob.ne.ny0) then
            eta = ( dble (jglob-1) ) / (ny0-1)
            do i = 1, nx
              iglob = ipt + i
              IF (iglob.ne.1.and.iglob.ne.nx0) then
               xi = ( dble (iglob-1) ) / (nx0-1)
               call exact (1,jglob,k,ue_1jk)
               call exact (nx0,jglob,k,ue_nx0jk)
               call exact (iglob,1,k,ue_i1k)
               call exact (iglob,ny0,k,ue_iny0k)
               call exact (iglob,jglob,1,ue_ij1)
               call exact (iglob,jglob,nz,ue_ijnz)
               do m = 1, 5
                  pxi =   ( 1.0d+00 - xi ) * ue_1jk(m)
     >                              + xi   * ue_nx0jk(m)
                  peta =  ( 1.0d+00 - eta ) * ue_i1k(m)
     >                              + eta   * ue_iny0k(m)
                  pzeta = ( 1.0d+00 - zeta ) * ue_ij1(m)
     >                              + zeta   * ue_ijnz(m)

                  u( m, i, j, k ) = pxi + peta + pzeta
     >                 - pxi * peta - peta * pzeta - pzeta * pxi
     >                 + pxi * peta * pzeta

               end do
              END IF
            end do
          END IF
         end do
      end do

      return
      end