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[DPRG] can can clarifications

Subject: [DPRG] can can clarifications
From: David P. Anderson davida at smu.edu
Date: Fri May 2 10:22:21 CDT 2014

I noticed several of the teams haven't registered yet (John's, Jason's, 
Karim's) so if we have 10 or 12 robots competing it's likely to take 
more than the 3 hours allotted for the whole roborama, and parallel 
competitions will almost certainly be required.  And parallel judges.  
Be nice if we had a second cancan course... just thinking out loud.


On 05/01/2014 10:25 PM, paradug wrote:
> David,
>     We will run two of the competitions in parallel if required. We 
> can stay later than 3:00 but I would like to finish about that time.
> Regards,
> Doug P.
> -----Original Message----- From: David Anderson
> Sent: Thursday, May 01, 2014 10:00 PM
> To: dprglist at dprg.org
> Subject: Re: [DPRG] can can clarifications
> I have a question as well.  The rules refer to the CanCan soccer as a
> double-elimination competition. That seems fair, so that the best and
> second best robot don't meet in the first round and the second best is
> then eliminated.
> According to Wikipedia, the number of rounds in a double-elimination
> competition is twice the number of contestants minus one.  So for the 8
> robots currently registered, thats (8x2)-1 = 15 rounds at 10 minutes per
> round is 150 minutes, 2 and 1/2 hours.  It's not clear that we have the
> Perot that long, as I understand there are other competitions (line
> following, mini-sumo) as well.   Do we have to be done by 3:00?
> dpa
> On 05/01/2014 02:17 PM, Karim Virani wrote:
>> Doug, I'd like to request some clarifications about can can:
>> The rules say can placement is up to the referee.  Does that mean it 
>> can change for every round and won't be consistent for all 
>> competitors?  Or will it be laid out and made consistent between 
>> runs?  If so, how will the intended positions of the cans be marked?  
>> Will there be an attempt to make the pattern symmetrical over the 
>> half line? This is about fairness and accidental bias in the 
>> placement of cans.
>> There is no language about assignment of goal ownership or switching 
>> goals at some kind of halftime or between rounds.  In real soccer 
>> this is an attempt to balance the effect of the sun and the weather.  
>> At the Perot, this is a bank of windows that could adversely affect 
>> competitors that are reliant on optical sensors of various kinds.  I 
>> don't have a good suggestion for how to address this without over 
>> complicating the rules - maybe somebody else has an idea or two.  I 
>> wanted to at least acknowledge the highly asymmetric lighting of the 
>> space which you can see in the photo in the rules, but really need to 
>> be there to appreciate.  Last year the long access of the course was 
>> set up parallel to the windows and this at least equalizes the field 
>> somewhat.
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