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

[Hilaire Fernandes]

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.

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