Greetings.

Please find two files attached to this message.

1. A patch implementing Processing programming language support in
   Babel. The commit message of the patch is the following:

   ********************************************************************
   ob-processing.el: Support for Processing language in Babel
   
   * lisp/ob-processing.el: Necessary functions for implementing editing
   of Processing code blocks, viewing the resulting sketches in an
   external viewer, and HTML export of the sketches.
   
   Editing Processing blocks requires processing2-emacs mode. Viewing
   Processing blocks embedded in Org buffer in an external viewer also
   requires processing2-emacs. This viewing is bound to C-c C-v C-k and
   produces no results in Org buffer. HTML export of the results of a
   Processing block is also supported, assuming that the processing.js
   module is available: the sketch is then drawn by the browser when the
   HTML page is viewed. This drawing is implemented by embedding the
   Processing code in a script using the processing.js module. The user
   is responsible for making sure that processing.js is available in the
   correct location.
   
   Console output from a Processing block produced e.g. by println() is
   shown in the Processing compilation window when the code is executed
   in Org buffer, and in text area (console) of the browser when the code
   is embedded in HTML.
   ********************************************************************

2. File test.org, illustrating the use of Processing in Org. The HTML
   export of this file can be viewed at

   http://www.syk.fi/~jhurri/org-processing/test.html

   The sketches (figures) on the page will be re-initialised on page
   reload.

I will be writing teaching material using a combination of Org and
Processing, and may add features to Processing support if I find the
need.

All the best,

Jarmo