| Re: [eigen] Eigen appears to rock. |
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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] Eigen appears to rock.
- From: "Thomas Vaughan" <tevaughan@xxxxxxxxx>
- Date: Fri, 22 Aug 2008 10:01:01 -0600
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On Fri, Aug 22, 2008 at 8:07 AM, <jacob@xxxxxxxxxxxxxxx> wrote:
>
> Hm regardless of intuitiveness discussions... it remains that
> p1+0.5*(p2-p1)
> is slower than (p1+p2)*0.5 so it would be very unfortunate to require
> our users to do that! Same thing with any approach based on converting
> back and forth between vector and point.
Agreed.
The right solution is for me to base my Point class on your framework
because it works for me. :^)
It seems too bad that there is no way to express in an efficient way
certain mathematical ideas, such as that two points in space have a
difference but no sum (as can be seen by the consideration of vectors
and points independent from their representation in a particular
coordinate system).
Thanks for your patience!
--
Thomas E. Vaughan
There are only two kinds of people; those who accept dogma and know it,
and those who accept dogma and don't know it. - G.K. Chesterton