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[Václav Šmilauer <eudoxos@xxxxxxxx>]

> Isn't it just because you used a big dt*velocity?
> What happens when you reduce dt?
> > I would like to have some straightforward way, something like
> > trsfRate=Matrix3(0,1,0, 0,0,0, 0,0,0), which would progressively apply
> > just that one shear.
> This is what happens actually, if you consider trsfRate = gradVel. (I think)

currently:

  _trsfInc=dt*velGrad;
  trsf+=_trsfInc*trsf;

note that there is _trsfInc*trsf, not just _trsfInc. It there was only
trsfInc, then it would work that way.