program movebloubs

  use bloubspace
  use povstuff
  use mathstuff

  implicit none

  character(200)           :: infile, outfile
  integer                  :: inu, outu, errcode, i
  integer                  :: compteur, killed
  type(t_bloubs)           :: bloub
  double precision         :: bx, by, bz
  ! logical                  :: add_new_bloub = .TRUE.
  ! real                     :: rnd

  call init_random_seed()

  i = IARGC()
  if (i .ne. 2) then
    STOP ": BAD ARGS ON COMMAND LINE"
  endif
  call getarg(1, infile)
  call getarg(2, outfile)

  write (0, '(A)') &
  "*** moving bloubs from "//trim(infile)//" to "//trim(outfile)

  open(newunit=inu,                                          &
                  file=trim(infile), form='unformatted',     &
                  iostat=errcode,                            &
                  action='read', status='old')
  if (0 .ne. errcode) then
    STOP " : CAN'T OPEN FILE " // trim(infile)
  endif

  open(newunit=outu,                                         &
                  file=trim(outfile), form='unformatted',    &
                  iostat=errcode,                            &
                  action='write', status='replace')
  if (0 .ne. errcode) then
    STOP " : CAN'T OPEN " // trim(outfile) // "FOR WRITE"
  endif

  bx = 0.0;   by = 0.0;   bz = 0.0
  compteur = 0
  killed   = 0

  do
    read (unit=inu, iostat=errcode) bloub
    if (0 .ne. errcode) then
      ! may be we got an EOF ?
      exit
    endif

    ! moving and boundingboxing
    call move_bloub    (bloub, 0.15)
    call bound_a_blob  (bloub)
    call green_soylent (bloub)
    if (.NOT. bloub%alive) then
      ! write(0, '(A)') "   KILL!"
      killed = killed  + 1
      cycle
    endif
    ! calcul du barycentre
    bx = bx + dble(bloub%px)
    by = by + dble(bloub%py)
    bz = bz + dble(bloub%pz)

    write(outu, iostat=errcode) bloub     ! no error control ?
    if (0 .ne. errcode) then
      STOP " : WRITE ERROR TO " // trim(outfile)
    endif
    compteur = compteur + 1

  enddo

  ! ok, we have read all the bloubs in the input file

  ! insert some fancy conditional here
  if (compteur .LT. 1500) then

    call add_more_bloubs(outu, 8, 0.075)

  endif

  close(inu)    ;    close(outu)

  if (killed .GT. 0) then
    write (0, '(I5, A)') killed, " bloubs killed"
  endif

  bx = bx / dble(compteur)
  by = by / dble(compteur)
  bz = bz / dble(compteur)
  write (0, '(A,3(F12.6,3X))') "barycentre : ", bx, by, bz

! --------------------------------------------------------------
contains

  subroutine add_more_bloubs(un, nbre, wtf)
  integer, intent(in)        :: un, nbre
  real,    intent(in)        :: wtf
  type(t_bloubs)             :: bloub
  integer                    :: foo

  do foo=1, nbre

    bloub%nick = 'newbie  '
    bloub%alive = .TRUE.
    call random_pv(bloub)
    bloub%radius = wtf
    bloub%age   = foo
    ! call display_bloub (bloub, "new bloub")
    write(un) bloub              ! no error control ?

  enddo

  end subroutine

! --------------------------------------------------------------

end program movebloubs