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!***********************************************************************
!
!
SUBROUTINE init_ew
!
!
!***********************************************************************
!
! Reads data from file and interpolates in given
! points using a Cloud-In-Cell scheme as given in
! eqs. 1d) and 2b) of Efstathiou et al., ApJS 57, 241 (1985)
!
!
!=======================================================================
USE fly_h
implicit none
INCLUDE 'mpif.h'
INTEGER:: i,j,k
IF(me.eq.0) THEN
! Open ewald data files.
! ---------------------------------
OPEN(UNIT=uewgrid,FILE=fewgrid,STATUS='OLD')
OPEN(UNIT=uewtab,FILE=fewtab,FORM="UNFORMATTED",STATUS='OLD')
! Read fc components
! ------------------
DO 10 i=0, nknots
DO 20 j=0, nknots
DO 30 k=0, nknots
READ(uewtab) fc(i,j,k,1),fc(i,j,k,2),fc(i,j,k,3)
30 CONTINUE
20 CONTINUE
10 CONTINUE
CLOSE(UNIT=uewtab)
! Read rk components
! ------------------
DO 40 i=0, nknots
READ(uewgrid,*) rk(i,1)
rk(i,2)=rk(i,1)
rk(i,3)=rk(i,1)
40 CONTINUE
CLOSE(UNIT=uewgrid)
write(uterm,*)"PE=",me," ew_red completed"
ENDIF !if(me.eq.0)
NLONG=(nknots+1)*3
CALL MPI_Bcast(rk(0,1), NLONG, MPI_REAL8, PE0, MPI_COMM_WORLD, ierror)
NLONG=(nknots+1)*(nknots+1)*(nknots+1)*3
CALL MPI_Bcast(fc(0,0,0,1), NLONG, MPI_REAL8, PE0, MPI_COMM_WORLD, ierror)
RETURN
END