"Hubert Holin" <Hubert.Holin@meteo.fr> wrote in message news:Hubert.Holin-94C135.13380630052005@sea.gmane.org... | Somewhere in the E.U., le 30/05/2005 | | Bonjour | | In article <d5bk7j$jg7$1@sea.gmane.org>, | "Thorsten Ottosen" <nesotto@cs.auc.dk> wrote: | | > "Beman Dawes" <bdawes@acm.org> wrote in message | > news:d5bav1$fha$1@sea.gmane.org... | > | | > | "Hubert Holin" <Hubert.Holin@meteo.fr> wrote in message | > | news:Hubert.Holin-6DA78B.18275104052005@sea.gmane.org... | > | > Paris (U.E.), le 04/05/2005 | > | > | > | > | > Dare I say that this time around I would try to not drop the ball | > | > (again) and propose the quaternions and octonions as possible "Small | > | > Additions"? | > | > My understanding of the quaternions lib is that it is not useful for | > doing rotations and that stuff needed in the 3D graphics world. | | Could you please elaborate? I did include one possible way of | linking with rotations in the library. This work did stem (in part) from | some work with rotations specifically for some 3D graphics problem | (though this part, interpolation of orientation under constraints, is | *not* included in the library). | | > If you intend to submit it, I would like to see motifications that made this | > possible. | > | > -Thorsten | | I am open to any suggestion. I must say this post is something of | a surprise to me. Perhaps are you referring to the lack of any | "reasonably standard" C++ implementation of rotations in R^3? no, I think I'm referring to comment from Gary Powel about this issue (he works in the Games industry, I think) anyway, I don't have seriuos time to investigate this issue, but maybe you could look at scene graph packages like OSG to see if you can do the same: http://www.openscenegraph.org/documentation/OpenSceneGraphReferenceDocs/clas... best regards Thorsten