[Squeakland] spiral
Alan Kay
alan.kay at squeakland.org
Tue Dec 7 14:59:00 PST 2004
Thanks Kim --
... we should probably write up something about what they mean and how they
can be used ...
Cheers,
Alan
-------------
At 02:43 PM 12/7/2004, Kim Rose wrote:
>Hi, Randy/Alan --
>Randy is indeed using the latest/greatest "Etoy/Squeakland" version. Both
>"theta" and "headingTheta" appear by default in the geometry category of
>an object's viewer in this version.
> -- Kim
>
>
>At 4:24 PM -0500 12/7/04, Randy Heiland wrote:
>>Uh, I said "Squeak" backwards 3 times really fast? :) It's possible that my
>>environment may be a bit screwy. Early on I was using some full-blown
>>version of Squeak, but thought that I was currently using the Etoys version.
>>The world -> desktop menu -> help -> "about this system" tells me I'm
>>running Squeakland 3.8.5976 update #371
>>
>>--Randy
>>
>>> -----Original Message-----
>>> From: Alan Kay [mailto:alan.kay at squeakland.org]
>>> Sent: Tuesday, December 07, 2004 4:05 PM
>>> To: JOHN VOIKLIS; Randy Heiland
>>> Cc: squeakland at squeakland.org
>>> Subject: Re: [Squeakland] spiral
>>>
>>> To John and Randy
>>>
>>> By the way, headingTheta is part of the vector category in etoys, has a
>>> different purpose and orientation than "heading", and is not needed for
>>> making spirals or other LOGO like geometric figures. "headingTheta" (and
>>> the rest of the vector stuff) is usually not visible in a vanilla Etoy
>>> system. How did you get it to be visible in yours?
>>>
>>> Cheers,
>>>
>>> Alan
>>>
>>> -----------
>>>
>>> At 06:31 AM 12/7/2004, JOHN VOIKLIS wrote:
>>> >Hi Randy,
>>> >
>>> >Attached is a quick, if somewhat simple-minded, fix.
>>> >
>>> >Best,
>>> >
>>> >John
>>> >
>>> >
>>> >On Mon, 6 Dec 2004 14:57:50 -0500, Randy Heiland <heiland at indiana.edu>
>>> wrote:
>>> > > How might one create a script to draw a spiral? I mistakenly thought
>>> that
>>> > > if I did something like:
>>> > >
>>> > > Fwd by 5
>>> > > Turn by <obj> headingTheta + 2
>>> > > penDown
>>> > >
>>> > > that I might accomplish it. However, it seems that the headingTheta
>>> is not
>>> > > dynamically updated in this script, i.e. the heading never changes.
>>> > >
>>> > > Thanks, Randy
>>> > >
>>> > > _______________________________________________
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>>> > >
>>> >
>>> >
>>> >--
>>> >***FOR ALL THOSE WHO INCLUDE ME IN THEIR ADDRESS BOOKS, PLEASE CHANGE
>>> >MY ADDRESS TO: voiklis @gmail.com***
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>>
>>
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