Re: [ferret_users] Viewport : Relation between size and boundaries

[Ansley Manke <ansley.b.manke@xxxxxxxx>]

Hi Jaison,
This is because of how Ferret automatically sets up the margins. Do you 
want the axes to line up, with the axes of the smaller viewport matching 
the lower right corner of the larger one? This will be much easier if 
you use DEFINE VIEWPORT/AXES.  You'll need to decide what space if any 
to reserve for the axes, but then you're home free. For instance,

 ! Remove tics and Labels
      ppl tics 0 0 0 0 0 0
      ppl axlsze 0, 0

 ! A big viewport
    
      let xlo = 0.1; let xhi = 0.9
      let ylo = 0.1; let yhi = 0.9
      define view/AXES/xlim=`xlo`:`xhi`/ylim=`ylo`:`yhi` vbig ; set 
view vbig
      fill/nolab/nokey/pal=white I[I=1:10]*J[J=1:10]

 ! A small one on lower right corner
      let fgn_xlo = `xhi-0.25`
      let fgn_xhi = `xhi`
      let fgn_ylo = `ylo`
      let fgn_yhi = `ylo+0.25`
      define view/AXES/xlim=`fgn_xlo`:`fgn_xhi`/\
                      ylim=`fgn_ylo`:`fgn_yhi` vsmall
      set view vsmall
      fill/nolab/nokey/pal=white I[I=1:10]*J[J=1:10]



Jaison Kurian wrote:
> Hi,
>     I want to make two viewports, a big one and a smaller one such
> that the smaller one should just fit inside at the lower-right
> corner of the bigger one. A direct attempt goes like this ...
>
>   ! Remove tics and Labels
>        ppl tics 0 0 0 0 0 0
>        ppl axlsze 0, 0
>
>   ! A big viewport
>        define view/xlim=0.0:1.0/ylim=0.0:1.0 vbig ; set view vbig
>        fill/nolab/nokey/pal=white I[I=1:10]*J[J=1:10]
>
>   ! A small one on lower right corner
>        let fgn_xlo = `($VP_XHI)-0.25`
>        let fgn_xhi = `($VP_XHI)`
>        let fgn_ylo = `($VP_YLO)`
>        let fgn_yhi = `($VP_YLO)+0.25`
>        define view/xlim=`fgn_xlo`:`fgn_xhi`/\
>                        ylim=`fgn_ylo`:`fgn_yhi` vsmall
>        set view vsmall
>        fill/nolab/nokey/pal=white I[I=1:10]*J[J=1:10]
>
> Now the smaller one is gone outside the boundaris of bigger one !!!
>
>    1. Why should the rightern boundaries be different for the bigger
>         one and smaller one  (i mean ..what is the advantage over
>         size independant boundary) ??. What is the relation between
>         viewport size and its boundaries ??
>
>    2. How to fit the smaller one to the lower-right corner of bigger 
> one ?
>         I want the script to calculate the values needed to define the
>         smaller viewport, **STRICTLY** based on the information available
>         in ppl symbols about the first drawn bigger view port.
>
>    3. If there is an /AXES qualifier to "define viewport", then the
>         values returned by pplus symbols like $VP_XHI, $VP_XLO will be
>         different than the values supplied to the define command.
>         What is the relation between these given value and value 
> available
>         in pplus symbols ?
>
> Regards,
>
> Jaison