!                    SPIRALING...
! new Thu Apr 23 01:13.37 PM UTC 2026
!
module genplotting
  implicit none

  real      ::    xmin, xmax, ymin, ymax
  private   ::    xmin, xmax, ymin, ymax

  real      ::    xoffset, yoffset, xscale, yscale
  private   ::    xoffset, yoffset, xscale, yscale

  integer   ::    outunit
  private   ::    outunit

contains
! ---------------------------------------------------------
subroutine genp_init (foo, fname)
  integer, intent(in)             :: foo
  character (len=*), intent(in)   :: fname

  outunit = 6          ! stdout
  if (len(fname) .gt. 0) then
    write (0, '("genplot init opening : ", A)') fname
    open(newunit=outunit,file=fname)
  endif

  xmin = 9e9       ;       xmax = -9e9
  ymin = 9e9       ;       ymax = -9e9
  xoffset = 0.0    ;       yoffset = 0.0
  xscale  = 0.0    ;       yscale  = 0.0
end subroutine
! ---------------------------------------------------------
subroutine genp_move (px, py)
  real, intent(in)        :: px, py
  write (outunit, '(2F12.5, I5)') px, py, -1
  if (px .lt. xmin)      xmin = px
  if (px .gt. xmax)      xmax = px
  if (py .lt. ymin)      ymin = py
  if (py .gt. ymax)      ymax = py
end subroutine
! ---------------------------------------------------------
subroutine genp_draw (px, py, color)
  real, intent(in)        :: px, py
  integer, intent(in)     :: color
  write (outunit, '(2F12.5, I5)') px, py, color
  if (px .lt. xmin)      xmin = px
  if (px .gt. xmax)      xmax = px
  if (py .lt. ymin)      ymin = py
  if (py .gt. ymax)      ymax = py
end subroutine
! ---------------------------------------------------------
! ---------------------------------------------------------
subroutine genp_end (foo)
  integer, intent(in)    :: foo

  write (0, '("--- genp_end ---")')
  write (0, '("minmax X", 2F16.5)') xmin, xmax
  write (0, '("minmax Y", 2F16.5)') ymin, ymax

  write (outunit, '(2F16.5, I6)') xmin*1.05, ymin*1.05, -1
  write (outunit, '(2F16.5, I6)') xmin*1.05, ymax*1.05,  0
  write (outunit, '(2F16.5, I6)') xmax*1.05, ymax*1.05,  0
  write (outunit, '(2F16.5, I6)') xmax*1.05, ymin*1.05,  0
  write (outunit, '(2F16.5, I6)') xmin*1.05, ymin*1.05,  0
  close (outunit)

  if (6 .ne. outunit) then
    write (0, '("genp_end on ", I6, " is ", I6)') outunit, foo
  endif

end subroutine
! ---------------------------------------------------------
! ---------------------------------------------------------

end module genplotting