[Cuis-dev] The Cuis book and rotation in chapter 7 + typo

[Juan Vuletich]

On 2/28/2023 6:20 PM, Hilaire Fernandes via Cuis-dev wrote:
> Barry, Juan,
>
>
>> I felt that for casual playing with Morphs with (for instance) the 
>> halos, it was more intuitive to just rotate around the center. Of 
>> course, any morph is free to redefine #rotationCenter as appropriate.
>
> Understandable, it will make the rotation a bit strange for boxed 
> morphs as windows.
>
> The possibility to set the rotation center, simplify a bit the chapter 
> Barry was referring to and makes the exercises 7.3 and 7.4 obsolete. I 
> removed them from the book.
>
> Le 26/02/2023 à 11:07, Barry Perryman via Cuis-dev a écrit :
>>
>> It doesn’t look like the information on morph rotation is correct any 
>> longer - exercises 7.3 and 7.4 and the associated text around that on 
>> page 115.
>>
>> When I rotate any of the example morphs from this chapter - the 
>> line/cross, triangle and the rectangle - they all rotate about the 
>> centre and not the  0 at 0 point; this includes the triangle, which is 
>> fun to see.
>>
>> I’ve had a little dig through the morph handle code - just enough to 
>> be potentially wrong - and it seems that if a rotation centre isn’t 
>> specified then one is computed to be the middle of the morph bounds.
>
> I have updated the book and removed the unnecessary complications.
>
> Thanks for the report.
>

Thanks!

-- 
Juan Vuletich
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