yade-dev team mailing list archive

[boon chiaweng <booncw@xxxxxxxxxxx>]

Thx, it works.  I must have missed the vector and quaternion multiplication in thewm3  templates.

I have not used Eigen, but will use it later on.   What are the differences between using a template integrated into YADE, and one which is introduced like an external library? 


Regards,

CWBoon

> From: eudoxos@xxxxxxxx
> To: yade-dev@xxxxxxxxxxxxxxxxxxx
> Date: Tue, 15 Dec 2009 16:50:37 +0100
> Subject: Re: [Yade-dev] help with debug
> 
> BTW, speaking of that... delicate thing.
> 
> It would be nice to get rid of wm3 in the future. Clearly there is no
> option touching the existing computation code; the first step would be
> writing a _thin_ wrapper for eigen (OK, I like eigen, and I think it is
> really good) that would mimick exactly the wm3 interface + many tests
> that would show equivalent results for various operations etc. Eigen's
> interface is very similar to wm3, so it would be quite straightforward.
> 
> Would someone feel like taking this thing? We need Vector2<Real>,
> Vector3<Real>, Vector3<int>, then Quaternions and finally Matrix3<Real>;
> not so much, work for a few days and then some testing...
> 
> Cheers, Vaclav
> 
> 
> > Hi,
> > 
> > Can someone advise me how do I multiply a  Quaternion.Conjugate *
> > Vector * Quaternion?  The following doesn't work, including the
> > assignment in terms of "=" and "()".  I looked at the wm3 template,
> > but suspect that vector*quaternion is not supported?
> > 
> > Vector3r localP1 = (0); 
> >     localP1 = state1.ori.Conjugate() * tempP1 * state1.ori;
> >  Vector3r localP2 =  (0);
> >     localP2 (state2.ori.Conjugate() * tempP2 * state2.ori);
> > 
> > 
> > Yours,
> > 
> > CWBoon
> > 
> 
> 
> 
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