Re: [simspark-devel] New User Manual and Wiki

[Stefan G. <gla...@gm...>]

Hi Yuan,

thanks a lot for your help!

But I'm sorry, I have missed out some clear questions in the second part 
of my last email.
I've had already found the corresponding .rsg files and was also looking 
at the calculations. This was the reason why I came up with the issue of 
giving a clear descriptions to that in the wiki and the manual.
My real question was more like: is the modelling of the middle circle 
ment to stay like that?
In my opinion these 10 lines represent a lot of fix-points arranged 
around a small area. I'm also not sure, if there was a discussion about 
which field lines are/should be visible, so I wanted to stress this 
topic once before I draw a special picture for it. But since noone else 
took part in the discussion, I think I will add some description of the 
current arrangement of the field lines to the manuals.

Thanks,
Stefan



Am 16.05.2011 16:45, schrieb Yuan Xu:
> Hi Stefan,
>
> The reason of 10 lines modeled middle circle is only because it is the 
> simplest way.
> In the case of real robot ( image processing ), circle can be combined 
> by small lines or recognized directly by special methods.
>
> You can find the description of middle circle in 
> rcssserver3d/data/rsg/agent/fieldring.rsg
>
> Best Regards,
> Xu, Yuan
>
>
> On 05/12/2011 03:45 PM, Stefan Glaser wrote:
>
>
>> Hallo all,
>>
>> I'm currently updating the descriptions in the wiki according to the new
>> release. I was able to look up / get most of the information I was
>> looking for, but two questions are still not clear to me, which I now
>> want to ask you in this mail.
>>
>> First of all, I wanted to ask for the unit transmitted by the
>> accelerometer. I wanted to document that it now provides RAW-data, but
>> it's unclear to me, what's the real meaning of that. Can someone give me
>> a pointer on that?
>>
>> The socond problem I'm unclear about is the description of the field
>> lines. I visualized the field lines to get some idea, where they are
>> located and why the agent sees so much of them. Then I realized that the
>> middle circle is modelled with 10 small field lines. If the complete
>> circle is seen (what is often the case for most of the robots during a
>> game), this results in 20 coordinates located around a relatively small
>> spot in a very simple arrangment, also supported by the middle line. I
>> wonder about the purpose of putting in this kind of modelling of the
>> middle circle. 20 coordinates is a lot of traffic - in fact close to 50%
>> of the currently visible field lines are needed to model the middle
>> circle. I'm also not sure how realistic this is compared to a real
>> scenario... but I have no experience with that. But since I expect the
>> vision-errors to be applied separately on each coordinate, it should be
>> absolutely no problem to do e.g. a camera calibration within a few cycles.
>> Overall I struggle a bit with giving a clear decription to the field
>> lines. The normal lines don't need a special description, but if the
>> middle circle stays this way, I have to add some special description to
>> the arrangement of these lines.
>>
>> Best regards,
>> Stefan
>>
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