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          17 Jun 97 8:58 EDT
To: Maria Gini <gini@cs.umn.edu>
cc: reids+@CS.cmu.edu, arkin@cc.gatech.edu, aaai97@cc.gatech.edu
Subject: Re: more questions on "Find Life on Mars" 
In-reply-to: Your message of Mon, 16 Jun 1997 19:12:35 -0500.
             <199706170012.TAA12688@octavius.cs.umn.edu> 
From: Reid Simmons <reids+@CS.cmu.edu>
Date: Tue, 17 Jun 1997 08:58:57 -0400
Message-ID: <18673.866552337@jubilee.learning.cs.cmu.edu>
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Status: RO

Maria,
> 
> I have a few more questions/suggestions:
> 
> 1. do you have any idea of how tall and big will the rocks be?  
>    our robots are small, and so knowing the height of the rocks 
>    is important to estimate how likely it is that our view will
>    be obstructed.
> 
> 2, what material will the rocks be made of (cardboard, foam, etc?)
>    It would help to know how reliably they will be detectable by 
>    sonars.
> 
Ron can answer these questions, as he is arranging for the rocks.
However, my understanding is that they will be *real* rocks.  I forget the
color we decided upon (I think black), and Ron can tell you the size.

> 3. how will the forbidden areas be marked?  will they be of a 
>    specific color?  will the whole area be marked or just its 
>    boundary?
> 
The "forbidden areas" will be marked by placing black material (propably
construction paper) over the whole area.

> Since specific color schemes have been suggested, here is a sligthly 
> different proposal:
> 
> * use one color (bright and easy to distinguish) for the forbidden 
>   areas;
> * use another color for the squiggle balls;
> * use a third color for the dead martians;
> * use a geometric pattern (vertical or horizontal stripes of black 
>   and the color used for the object that has to be dropped in) for 
>   the doors of the pen.
> 
Thanks for the suggestions.  I'm still debating the color scheme -- but I will
probably use only solid colors, if possible -- no stripes or patterns, unless
there is compelling reasons otherwise.

Reid