Thanks Jeremy.
It worked.

http://ybabel.fr/code/ether.html

I managed to create some editable parameters : 
* damp: <$edit-text tiddler="EtherConfig" index="damp" default="" 
tag="input" type="text"/>

everything woks fine but when I try to get the value by code, It's not 
refreshed until I close/reopen my EtherTest tiddler. Which is weird. 
Basically, open "EtherTest", changing "damp" shoudl change the simulator 
(the ripples are smaller with 0.9 than 0.99 for example)

This is how I get my data value :

  function simulate() {

    damp = parseFloat(wiki.extractTiddlerDataItem("EtherConfig", "damp"));

this piece of code is called inside a setInterval (in ether.js)
timer_id = setInterval(function (sim) { sim();} , 1000/30, simulate);

my problem is that when I edit "damp" in the edit-text widget, the value is 
changed everywhere, except in the simulate() function.

I don't understand why. Is there some kiind of cache to refresh ?
I have to close and reopen "EtherTest" to make it get the new value of 
"EtherConfig":"damp".

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