mailing-list for TeXmacs Users

["Juan Pablo Romero" <address@hidden>]

> 4. Because we are now not only using interactive sessions, but also
> writing a more long code, we would "execute" some parts of the document.
> May be selecting them and then choosing and "execute marked parts"
> option or something like that. Every marked part is passed to the
> respective language "engine" and results of execution are shown. Because
> of the estructured nature of TeXmacs may be it can be done generating
> temporaly files of each Code Section and send them to the specified
> language "engine".


This seems like the Mathematica front-end, isn't it?
There, every document is composed of "cells". Each cell contains code (which 
can be executed) or formatted text (with fonts, etc).

I suppose it shouldn't be too dificult to adapt the current code to behave 
something like this:

* You start an interactive session and texmacs inserts a box, but this box 
allows multiline code fragmens. Texmacs assigns some id to the session.

* You submit the box's contents to the engine for execution (say, with 
<Shift+Enter>), and texmacs displays the result.

* You move out of the box, and continue editing your document.

* Later, you insert another code box, but use the id of the session you are 
interested in. So, texmacs doesn't start another session but submits the 
code to the previously started.

* There are commands for manipulating a session, like killing it, restarting 
it, etc.

* You can start engines in another machines, not only the local one.

* The result of the execution of a box can be something different than plain 
text. An image, for example.


I'm particularly interested in this feature, because some time ago I wrote a 
program (called "superficie") that is something like a 3d surface viewer. It 
reads a file containing 3d data for surfaces, points and lines and display 
these objects in a window using opengl. It's like a light version of 
geomview.

Anyway, the point is, I also wrote routines in several languages 
(mathematica, yacas, scheme) that mimics some Mathematica graphic funtions 
(ParametricPlot3D, Plot3D).

This program can also generate pixmaps or postscript. So, the output image 
could be saved in some temp file and automatically displayed by texmacs.

This is actual code:

------------------
(define f '(* x y))
(sup-plot-3d f (x -1 1) (y -1 1))
------------------

at this point, the program shows a window with the graph of 'f'. But it 
would be very nice if texmacs would display the image within the document.




Regards.


  Juan Pablo


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