On 21/03/12 16:27, Gael Varoquaux wrote:
> On Wed, Mar 21, 2012 at 04:23:18PM +0000, Andreas wrote:
>> But my impression is that scaling does not necessarily work linearly,
> It is affine, not linear. I.e you don't control the offset. If you want
> to set the scaling factor but not have an offset, you'll need to use the
> 'scale radius by absolute scalar' and scale the scalars that you pass in
> with the constant adjustment factor that you need.
>
> That's the only simple way I can see to achieve your needs.
Right - never heard about affine scaling.
Somewhat confusingly, it seems like the quiver3d cylinders do scale
linearly (reflected by them not having a 'scale radius by absolute
scalar' option)? I actually required a minimum radius ('offset'?) for
the cylinder so that the smallest ones remain visible; easily enough
done by hand too, of course.
Might be good to put details on how scaling works in the docs -- perhaps
I missed them.
Thanks a lot!
Andreas
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