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- Subject: Re: [eigen] Rigid Transformations in eigen: discussion thread
- From: Rohit Garg <rpg.314@xxxxxxxxx>
- Date: Fri, 18 Sep 2009 11:11:25 +0530
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> Yes. So if the user is OK to cope with having to call coeffs(), then
> he can do all what he likes, and get optimized code thanks to ET.
But for just an interpolation, you should not have to write coeffs()
Is there no other way to get ET without coeffs()?
How about the + and the * operator return vec8 expressions, and we
provide only 1 assignment operator to take vec8 expression as input?
>> The classic Grahm schmidt has a very poor numerical stability. It can
>> be modified to run in a stable manner, but there is ~2x operation
> Not when the matrix was already very close to being orthogonal, as is
> the case here if you re-normalize frequently enough. In that case,
> Gram-Schmidt is fine. But that is OT, as indeed it's never as good a
> solution as quaternions.
>> Another good point. What do you think of the current unit tests?
> sorry, haven't had time to look at it carefully.
> i guess the cout's aren't there to stay, for the rest i need to read
> it carefully, have to run now...
Department of Physics
Indian Institute of Technology