module xperiment

  implicit none
  contains

!===============================================================
! nouveau 24 mai 2022

subroutine parasites_0(pic, cx, cy, maxiter)
    implicit none

    ! here is the wtf
    integer, intent(inout), dimension (:,:)  ::  pic

    real, intent(in)                         ::  cx, cy
    integer, intent(in)                      ::  maxiter

    integer      ::  ix, iy, width, height
    real         ::  fx, fy, coef
    logical      ::  burps
    ! write(0, *) "subroutine parasites_0" , maxiter
    ! write(0, *) "constantes", cx, cy
 
    width  = ubound(pic, 1)    ;    height = ubound(pic, 2)
    coef   = float(maxiter)

    do ix = 1, width
      fx = cx + (float(ix) / (float(width)/4.0) - 2.0)
      burps = (RAND() .lt. 0.01)
      do iy = 1, height
        fy = cy + (float(iy) / (float(height)/4.0) - 2.0)

        if (burps) then
          pic(ix, iy) = int(fx * fy * coef * 1.005)
        else
          pic(ix, iy) = int(fx * fy * coef)
        endif

      enddo
    enddo

end subroutine parasites_0

!---------------------------------------------------------------
!
!    aucune idee de l'utilisation de ce truc !
!
subroutine loop_of_parasites_0(nbre, mode)
    implicit none
    integer, intent(in)       :: nbre, mode

    integer                   :: idx

    if (mode .NE. 0)  STOP "BAD MODE"

    do idx = 0, nbre

      write(0, *) "popcorn loop ", idx

    enddo

end subroutine loop_of_parasites_0

!===============================================================
end module xperiment