[Squeakland] sun-earth-moon

[Bert Freudenberg]

Shift-Halo-Click works easiest for me.

- Bert -

Am 16.02.2006 um 22:59 schrieb Nicholas Bennett:

> randy,
>
> I had done a sun earth moon system once and found that one could  
> set the
> rotation center fairly easily (I think one of the halo menu choices  
> maybe,
> also there I think you can tell it to display the rotation center  
> and the
> forward vector which can help visualize things).
>
> I had used the embedding as described below, but found that if I  
> simply
> embedded earth in sun the earth would be 'unselectable' when it did  
> not
> overlap with the sun - which made it awkward if you wanted to go  
> back and
> add the moon later. I ended up painting the 'orbit center' of my  
> 'orbiters'
> as a small dot in the orbiters sketch - a bit strange maybe but it  
> made it
> very clear where the rotation center should be and ensured that the  
> orbiters
> stayed selectable when embedded.
>
> regards,
> nicholas
>
>
>> From: Bert Freudenberg <bert at impara.de>
>> To: Mailinglist Squeakland <squeakland at squeakland.org>
>> Subject: Re: [Squeakland] sun-earth-moon
>> Date: Thu, 16 Feb 2006 19:08:22 +0100
>>
>> 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 -
>>
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>
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