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!if  $wims_read_parm!=slib_header
  !goto proc
!endif

slib_author=Georges, Khaznadar

slib_example= ,,,,,,,,,sin(x),[],0,0,1.2,1.5,2.4,3.2\
12,8,0,0,1 max t (ms),1 max U (V),blue,red,[255,128,128],sin(x),[0,0,1.3,1.4,2.5,3],0,0,1.2,1.5,2.4,3.2 \
,,,,,,,,,[cos(6.28*t),sin(6.28*t)],[],0,0,1.2,1.5,2.4,3.2

!exit

:proc

!reset slib_xd, slib_yd, slib_bg, slib_lc, slib_dc, slib_point, slib_xo, slib_yo, slib_xs, slib_ys, slib_correct slib_f, slib_labx, slib_laby, slib_maxx, slib_maxy

slib_parm=!item 1 to 11 of $wims_read_parm
!distribute item $slib_parm into slib_xd, slib_yd, slib_xo, slib_yo, slib_xs, slib_ys, slib_bg, slib_lc, slib_dc, slib_f, slib_correct

slib_point=!item 12 to -1 of $wims_read_parm

!default slib_xd=8
!default slib_yd=8
!default slib_xo=1
!default slib_yo=1
!default slib_xs=1
!default slib_ys=1
!default slib_correct=[]

slib_f = !declosing $slib_f

slib_labx=!word 2 to -1 of $slib_xs
slib_laby=!word 2 to -1 of $slib_ys
slib_xs=!word 1 of $slib_xs
slib_ys=!word 1 of $slib_ys

slib_maxx=!word 1 of $slib_labx
!if $slib_maxx = max
  slib_labx = !word 2 to -1 of $slib_labx
  !! we need to compute the X step slib_xs, given the values
  !! of the total width slib_xd, abscissa of origin slib_xo
  !! and knowing that slib_xs currently means a maximum value.
  !! slib_xd-slib_xo must be be sufficient to display ticks greater
  !! than the current value of slib_xs, the tick step being a multiple
  !! of 1, 2 or 5.
  slib_log=$[log10($slib_xs/($slib_xd-$slib_xo))]
  slib_logint=$[floor($slib_log)]
  slib_logmant=$[$slib_log-$slib_logint]
  !if $slib_logmant > $[log10(5)]
     slib_xs=1e$[$slib_logint+1]
  !else
    !if $slib_logmant > $[log10(2)]
      slib_xs=5e$slib_logint
    !else
      slib_xs=2e$slib_logint
    !endif
  !endif
!else
  slib_maxx=$empty
!endif

slib_maxy=!word 1 of $slib_laby
!if $slib_maxy = max
  slib_laby = !word 2 to -1 of $slib_laby
  !! we need to compute the Y step slib_ys, given the values
  !! of the total height slib_yd, ordinate of origin slib_yo
  !! and knowing that slib_ys currently means a maximum value.
  !! slib_yd-slib_yo must be be sufficient to display ticks greater
  !! than the current value of slib_ys, the tick step being a multiple
  !! of 1, 2 or 5.
  slib_log=$[log10($slib_ys/($slib_yd-$slib_yo))]
  slib_logint=$[floor($slib_log)]
  slib_logmant=$[$slib_log-$slib_logint]
  !if $slib_logmant > $[log10(5)]
    slib_ys=1e$[$slib_logint+1]
  !else
    !if $slib_logmant > $[log10(2)]
      slib_ys=5e$slib_logint
    !else
      slib_ys=2e$slib_logint
    !endif
  !endif
!else
  slib_maxy=$empty
!endif

slib_dc=!declosing $slib_dc

slib_correct=!declosing $slib_correct
slib_point=!declosing $slib_point

slib_bg=!declosing $slib_bg
!default slib_bg=240,233,255

slib_lc=!declosing $slib_lc
!default slib_lc=255,220,180

slib_dc=!declosing $slib_dc
!default slib_dc=10,10,10

!!!!!!!!!!!!!!!!! begin grid !!!!!!!!!!!!!!!!!!!!!!!!!

slib_grey=128,128,128

slib_dessin = new 60*$slib_xd,60*$slib_yd\
xrange -0.5, 10*$slib_xd-0.5\
yrange -0.5, 10*$slib_yd-0.5\
fill 1,1,$slib_bg

!! traits fins tous les millimetres
slib_dessin=$slib_dessin\
linewidth 1\
parallel 0, 0, 0, 10*$slib_yd, 1, 0, 10*$slib_xd+1, $slib_lc\
parallel 0, 0, 10*$slib_xd, 0, 0, 1, 10*$slib_yd+1, $slib_lc

!! traits gros tous les centimetres
slib_dessin=$slib_dessin\
linewidth 3\
parallel 0, 0, 0, 10*$slib_yd, 10, 0, $slib_xd+1, $slib_lc\
parallel 0, 0, 10*$slib_xd, 0, 0, 10, $slib_yd+1, $slib_lc

!! axe_x
slib_dessin=$slib_dessin\
linewidth 3\
hline 0, $[10*$slib_yo], $slib_grey\
segment $[10*$slib_xd-3],$[10*$slib_yo-1],$[10*$slib_xd-1],$[10*$slib_yo], $slib_grey\
segment $[10*$slib_xd-3],$[10*$slib_yo+1],$[10*$slib_xd-1],$[10*$slib_yo], $slib_grey\
parallel 0,$[10*$slib_yo+1],0,$[10*$slib_yo-1], 10, 0, $slib_xd+1, $slib_grey

slib_val=$[-$slib_xo*$slib_xs]
slib_dessin=$slib_dessin\
linewidth 1
!for slib_x from 0 to  10*$slib_xd step 10
  slib_dessin=$slib_dessin\
    text blue,$[$slib_x+1],$[10*$slib_yo-1],medium,$slib_val
  slib_val=$[$slib_val+$slib_xs]
!next slib_x
!if $slib_labx != $empty
  slib_dessin=$slib_dessin\
    text blue,$[$slib_x-20],$[10*$slib_yo-6],medium,$slib_labx
!endif

!! axe_y
slib_dessin=$slib_dessin\
linewidth 3\
vline $[10*$slib_xo],0, $slib_grey\
segment $[10*$slib_xo-1],$[10*$slib_yd-3],$[10*$slib_xo],$[10*$slib_yd-1], $slib_grey\
segment $[10*$slib_xo+1],$[10*$slib_yd-3],$[10*$slib_xo],$[10*$slib_yd-1], $slib_grey\
parallel $[10*$slib_xo+1],0,$[10*$slib_xo-1], 0, 0, 10, $slib_yd+1, $slib_grey

slib_val=$[-$slib_yo*$slib_ys]
slib_dessin=$slib_dessin\
linewidth 1
!for slib_y from 0 to  10*$slib_yd step 10
  slib_dessin=$slib_dessin\
    text blue,$[10*$slib_xo+1],$[$slib_y-1],medium,$slib_val
  slib_val=$[$slib_val+$slib_ys]
!next slib_y
!if $slib_laby != $empty
  slib_dessin=$slib_dessin\
  text blue,$[10*$slib_xo-9],$[$slib_y-10],medium,$slib_laby
!endif

!!!!!!!!!!!!!!!!! end grid !!!!!!!!!!!!!!!!!!!!!!!!!

!! red dots : the correct list
n1=!itemcnt $slib_correct
!for i from 1 to $n1 step 2
  !if $i < $n1
    slib_x=!item $i of $slib_correct
    slib_x=$[10*$slib_x/$slib_xs]
    slib_y=!item $[$i+1] of $slib_correct
    slib_y=$[10*$slib_y/$slib_ys]
    slib_x1=$[10*$slib_xo+$slib_x-0.6]
    slib_x2=$[10*$slib_xo+$slib_x+0.6]
    slib_y1=$[10*$slib_yo+$slib_y-0.6]
    slib_y2=$[10*$slib_yo+$slib_y+0.6]
    !! add one red dot
    slib_dessin=$slib_dessin\
    linewidth 2\
    segment $slib_x1,$slib_y1,$slib_x2,$slib_y2,red\
    segment $slib_x2,$slib_y1,$slib_x1,$slib_y2,red
  !endif $i < $n1
!next i

!! the function : blue thin curve
slib_n = !itemcnt $slib_f
!if $slib_n = 1
  slib_f = !replace internal x by ($slib_xs/10*(x-10*$slib_xo)) in $slib_f
  slib_f = 10*($slib_f)/$slib_ys+10*$slib_yo
!else
  slib_x = !item 1 of $slib_f
  slib_y = !item 2 of $slib_f
  slib_x = 10*($slib_x/$slib_xs+$slib_xo)
  slib_y = 10*($slib_y/$slib_ys+$slib_yo)
  slib_f = $slib_x, $slib_y
!endif

slib_dessin=$slib_dessin\
plot blue, $slib_f

!! black dots
n2=!itemcnt $slib_point
!for i from 1 to $n2 step 2
  !if $i < $n2
    slib_x=!item $i of $slib_point
    slib_x=$[10*$slib_x/$slib_xs]
    slib_y=!item $[$i+1] of $slib_point
    slib_y=$[10*$slib_y/$slib_ys]
    slib_x1=$[10*$slib_xo+$slib_x-0.6]
    slib_x2=$[10*$slib_xo+$slib_x+0.6]
    slib_y1=$[10*$slib_yo+$slib_y-0.6]
    slib_y2=$[10*$slib_yo+$slib_y+0.6]
    !! add one '$slib_dc' dot
    slib_dessin=$slib_dessin\
    linewidth 2\
    segment $slib_x1,$slib_y1,$slib_x2,$slib_y2,$slib_dc\
    segment $slib_x2,$slib_y1,$slib_x1,$slib_y2,$slib_dc
  !endif $i < $n2
!next i

slib_out= $slib_dessin