[Squeakland] reflection symmetry - again

[Samir Saidani]

Hello,

At first glance, I would say that picture treatment is something not
related to E-toy : we should be able to ask a picture (a morph
actually) to rotate itself, or to perform a symmetric reflection and
so one... So adding symmetric reflection would be a new transformation
added to the different transformations already present for Morph. So
if I would like to add such a feature to Squeak, I would start to
understand how a simple rotation could be done in Squeak (by
inspecting morph at run-time, inspecting the halo-morph) and then add
the symmetric reflection in the same way. When I will able to do this,
I would look how an E-toy communicates with its own morph (costume)
and how I could ask to the costume morph to perform a symmetric
reflection. Looking for method senders, method implementers, class
references will be valuable through this journey... It would be anyway
interesting to get morph able to perform symmetric reflection.

Good luck !

Look here : http://coweb.cc.gatech.edu/cs2340/26

Samir

PS: Reply-to seems to be misconfigured in squeakland, a simple reply
does not reply to the list.

Andreas Raab <andreas.raab-Mmb7MZpHnFY at public.gmane.org> writes:

> Hi Randy,
>
> Yes, the "non-standard" rotation styles aren't properly supported in the 
> current eToys. Unfortunately, it is very hard to fix that particular 
> problem because it ties in with parts of the core architecture that 
> we've only learned to understand after building the current version. In 
> short, after talking about this issue none of us feels comfortable to 
> apply a "quick fix" that stays short of rewriting the whole graphics 
> architecture (something that we cannot afford to do).
>
> Sorry for the inconvenience.
>
> Cheers,
>    - Andreas
>
> Randy Heiland wrote:
>> In anticipation of some upcoming Squeak-related projects, I return once
>> again to the issue of wanting to perform a reflection symmetry:
>> 
>> http://squeakland.org/pipermail/squeakland/2005-February/002396.html 
>> 
>> I see that this is still an unresolved feature in eToys, i.e., the flip
>> left-right rotationstyle disregards the position of the sketch's "rotation
>> center" and simply flips the sketch in-place.  Tweak, however, does what I
>> want (see attached images).  Here, once again, I wish I was capable of doing
>> Squeak/eToys development and could simply go look at/modify the code base to
>> make this happen.  But for now I'm still at the mercy of all you wonderful
>> developers and ask "can you mimic the turn/rotate Tweak code in eToys?"
>> 
>> --Randy
>> 
>> 
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