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

[Hilaire Fernandes]

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.

I see.

I have not checked it yet, I remember discussing with Juan about the 
possibility to alter the center of rotation.

Juan will it not be better to keep it backward compatible: if not 
specified the center of rotation will be (0;0)?


>
> 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.
>
> Finally a really tiny typo - in section 6.2.2, first sentence of third 
> paragraph it reads:
>
> So far in our model, a torpedo is not subjected to the /central 
> start//gravity pull/ nor its engine acceleration
>
> I think that the central start should be central star’s.

Yep.

Thanks

-- 
GNU Dr. Geo
http://drgeo.eu
http://blog.drgeo.eu
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