yade-dev team mailing list archive

[Anton Gladky <gladky.anton@xxxxxxxxx>]

I checked and cannot understand, why Wm3 sometimes "looses" the angle. r40
______________________________

Anton Gladkyy


2010/2/11 Václav Šmilauer <eudoxos@xxxxxxxx>

> > Quaternion from 2 vectors (Align in Wm3) also gives different results
> > with Eigen library.
>
> Can you check what's wrong with Align? I used it in Dem3DofGeom classes
> and results are good in wm3. Its geometrical meaning is very clear, it
> computes quaterion rotation from one vector to another. What's the
> problem there? Try with normalized/non-nomrlaized vectors etc, on some
> examples you can compute yourself, like
> Align(Vector3r(1,0,0),Vector3r(0,1,0)) should be
> Quaternion(Vector3r(0,0,1),pi/2) (as axis,angle). And so on.
>
> Cheers, v
>
>
>
>
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