Re: Only scored 0.2787 in Al Z's circle packing contest :)

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Al Getz wrote:

> Juergen Luethje wrote:
>> 
>> Al Getz wrote:
>> 
>>> I decided to test my strategy of different diameter circle packing out by
>>> submitting a test set in Al Zimmerman's Circle Packing Contest.

<snip>

>> How about simulating a rotating lottery machine (2 dimensional, of
>> course)
                                                    ^^^^^^^^^^^^^

<http://www.stern.de/standard/popup_neu.html?id=545423&bildint=0&img=%2F_content%2F54%2F54%2F545423%2Flottofee500_500.jpg&cred=Martin+Oeser%2FDDP&width=500&height=375&bgcol=%23FFE3CF&nv=pp&navid=81>

>> Just another idea, trying to avoid thinking about the underlying
>> Geometry. blink
>
>
> Hi Juergen,
> 
> 
> Hey thanks for reposting that link, as i almost forgot to look at it.

That was thanks to Topica. blink
Firstly I had sent that message by mail. When I didn't see it on EUforum
after about 8 hours, I used the web interface at listfilter.com to
repost the message. Then after 1 day or so, Topica delivered the
original message ...

> I think that would be pretty interesting too, but much harder

I agree.

> because it's in three dimensions

My suggestion was to restrict it to 2 dimensions, see ^^^^^ above.
But even then it's not easy to write such a program.

> and the physics of the machine and it's contents
> would have to be simulated...neither of which are necessary in circle
> packing problems (depending on your strategy of course).
> I could see a program like this taking a bit of time to calculate the
> next delta t positions if there are a lot of balls in the globe.

In the meantime I've thought a little about the underlying geometry, and
some things are not as difficult as I had expected. smile
There are still some problems that I haven't solved (yet), though.


In the other post you wrote:
| I myself wasnt very interested in circle packing at all, until i found
| a very practical use for packing all circles the same diameter, at
| which time i ended up with a program.

I understand that very well, as I'm also very often interested in the
*practical use* of things.
However, the little Euphoria program that I have so far not only
calculates the circles but also draws them on the screen, and for me the
pictures are aesthetically very pleasing.
( They remind me somewhat of the art of Victor Vasarely, which was
rather well known in the 70s ... )

In the other post you also wrote:
| Only thing left now is...what would be a practical use for this kind of
| thing?  I have trouble coming up with something, except for one rather
| off beat application:  You'd like to display the family 'tree' as a
| bunch of round pictures of different sizes of family members and you'd
| like to pack them neatly into a large circle, print the whole pic out,
| and hang it on the wall :)

This sounds like a good idea for a self-made Christmas present, no? smile

Regards,
   Juergen

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