;+
;
; @file_comments
; Add an axis when we do an oblique section in <pro>pltz</pro>, 
; <pro>pltt</pro>
; or <pro>plt1d</pro>
;
; @categories
; Graphics
;
; @param ENDPOINTS {in}{required}
; Coordinate of extremities of the section
;
; @param TYPE {in}{required}{type=string}
; A string of two characters specifying the type of plot we do
;
; @param POSFENETRE {in}{required}{type=vector}
; The vector !p.position corresponding to the frame position of
; the drawing part of the plot.
;
; @uses
; common.pro
;
; @history
; Sebastien Masson (smasson\@lodyc.jussieu.fr)
;
; @version
; $Id$
;
;-
PRO addaxe, endpoints, type, posfenetre, _EXTRA=ex
;
  compile_opt idl2, strictarrsubs
;
@common
;---------------------------------------
   IF strpos(type, 'x') NE -1 THEN BEGIN
      IF endpoints[1] EQ endpoints[3] THEN return
      IF key_onearth THEN BEGIN
        formeaxe0 = 'lonaxe'
        formeaxe1 = 'lataxe'
        titreaxe = 'latitude'
      ENDIF ELSE BEGIN
        formeaxe0 = ''
        formeaxe1 = ''
        titreaxe = 'j index'
      ENDELSE
      range = [endpoints[1], endpoints[3]]
      if endpoints[2] LT endpoints[0] THEN range = reverse(range)
   ENDIF ELSE BEGIN
      IF endpoints[0] EQ endpoints[2] THEN return
      IF key_onearth THEN BEGIN
        formeaxe0 = 'lataxe'
        formeaxe1 = 'lonaxe'
        titreaxe = 'longitude'
      ENDIF ELSE BEGIN
        formeaxe0 = ''
        formeaxe1 = ''
        titreaxe = 'i index'
      ENDELSE
      range = [endpoints[0], endpoints[2]]
      if endpoints[3] LT endpoints[1] THEN range = reverse(range)
   ENDELSE
   if type EQ 'yt' then BEGIN
      axis,yaxis=0,ytickformat=formeaxe0,color=0,ystyle = 1, _EXTRA = ex
      axis,yaxis=1,ytickformat=formeaxe1,color=0,ystyle = 1,ytitle=titreaxe, yrange = range, _EXTRA = ex
   ENDIF ELSE BEGIN
      axis,xaxis=0,xtickformat=formeaxe0,color=0,xstyle = 1,_EXTRA = ex
      axis,xaxis=1,xtickformat=formeaxe1,color=0,xstyle = 1,xtitle=titreaxe, xrange = range, _EXTRA = ex
   ENDELSE

;---------------------------------------
   return
end