This is kind of similar to my ink idea. I remember when I was young they
used to sell this liquid (blue or red) that you splash into other's clothes,
and it will make a huge mess, and after a while it would evaporate without
leaving any residues... it was very funny, people used to get very mad at
me.

In the simulator, one of the parameters that may vary is the evaporation
time. In your water example, that could be easily obtained by just replacing
the liquid by alcohol or even benzine (although the last one may have some
undesireable effects on the observers).

Padu

> or just water ... and try for conductivity? you could use any cloth as
> "land" ...
>
> or cloth change color while wet, and your robots sens this change? this
will
> give you a visual trace ... could be nice for an over cam to register
> movements and  paths.
> this could be the cheaper form of feromones :)
>
> andres


_______________________________________________
http://www.piclist.com
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist