I suggest two solutions; -via TPolyMarker3D (see example in tutorial tornado.C -via TNtuple. make a Tree with your variables x,y,z, possibly more to visualize one event (one Tree), do ntuple.Draw("x:y:z","may be a cut (or cuts)") This will produce a 3-d scatter plot that you can rotate interactively or via the OpenGL viewer (in 4.01/02) Rene Brun Balint Radics wrote: > > Hello, > > I would like to rotate set of points (x,y,z) in 3D. Which class should I > use to do that?I didn't find any rotational functions in the TMatrix class. > I found general transformational functions only in the TGeoMatrix classes > but that belongs to the detector geometry classes,don't they? > Or maybe I am wrong. > And do you have little example scripts for matrix transformation? > I mean general rotation or translation functions.Like: > > m = new TMatrix(3,1,elements); > m->Rotate(phi,theta); > > etc.... > > I am trying to MC-simulate ellipsoid showers of hadrons in a detector... > > Thanx in advance, > > radbal
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