[Squeakland] sun-earth-moon

Kim Rose kim.rose at squeakland.org
Thu Feb 16 14:36:23 PST 2006

Alan Kay has also done some very nice "falling body" simulations -- 
perhaps we can send a few around.

At 1:40 PM -0500 2/16/06, Randy Heiland wrote:
>Wow, this looks promising!  I thought I knew embedding, but apparently not.
>In my sun-earth-moon project, I have the earth away from the sun but its
>rotCenter inside the sun and when I bring up the earth's embed submenu, I
>see 'sun' (not 'moon').  However, when do the analogous thing with the
>moon/earth, all I see in the moon's embed submenu is 'PasteUpMorph' and
>'SketchMorph' - no 'earth' or 'sun'.  What's up?  Currently these sketches
>live in the World, not in a playfield.
>>  -----Original Message-----
>>  From: Bert Freudenberg [mailto:bert at impara.de]
>>  Sent: Thursday, February 16, 2006 1:08 PM
>>  To: Mailinglist Squeakland
>>  Cc: Randy Heiland
>>  Subject: Re: [Squeakland] sun-earth-moon
>>  Am 16.02.2006 um 16:43 schrieb Randy Heiland:
>>  > Is it possible to squeak planetary motion?
>>  Yes. You have to embed the moon into the earth (you find "embed" in
>>  the halo menu). Then, when you move the earth, the moon already moves
>>  with it.
>>  Here's an example:
>>	http://squeakland.org/project.jsp?http://impara.de/~bert/projects/
>>  Sonne-Erde-Mond.001.pr
>>  - Bert -
>Squeakland mailing list
>Squeakland at squeakland.org

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