Hi Dmitri, In versions 2.22 or earlier, 3-d objects need two functions Is3D () return kTRUE; SizeOf3D calculating the total number of points/segments. You must implement these two functions in your class TrackDisplay. See examples in the existing Root 3-D primitives. In case you need additional help, you can contact me at FNAL where I am until Saturday. Rene Brun On Mon, 29 Nov 1999, Dmitri Litvintsev wrote: > > > > Thank you, Rene, > > What I actually had was: > > a class 'TrackDisplay' inherited from 'TObject' > > TrackDisplay's being drawn in the Canvas ( Draw() ) > > TrackDisplay has 'Paint' method overriden like this: > > void TrackDisplay::Paint(Option_t* opt) { > for (int i=0; i<TrackList()->GetEntriesFast(); i++) { > TrackList()->Track(i)->Paint(opt); > } > } > > class 'Track' inherits from 'TObject' and has a > member 'fLine' which is 'TPolyLine3D'. > > Track's Paint method is overriden like this: > > void Track::Paint(Option_t* opt) { > fLine->Paint(opt); > } > > Scheme looks a bit perversive, but at the moment this is what > I need. > > So I gather I have to add 'Bool_t Is3D()' to 'TrackDisplay' > (I'm using v2.22/06). > I did so and got seg. violation with: > > Unable to allocate memory for point segments ! > > message. > > > > On Thu, 25 Nov 1999, Rene Brun wrote: > > > Hi Dmitri, > > I do not see any problem with TPolyLine3D and X3D. > > Do you draw directly your TPolyLine3D objects or do you draw > > your own object where you loop on TPolyLine3D objects ? > > In the later case, > > - if you use 2.22 you have to declare a function > > Bool_t Is3D() {return kTRUE;} > > - if you use 2.23 derive your class from TAtt3D > > > > Rene Brun > > > > Dmitri Litvintsev wrote: > > > > > > Hi Rooters, > > > > > > I've got a problem with x3d view of the detector (TNode) containing > > > tracks (TPolyLine3D). > > > > > > 'X3D view' shows the detector but does not show tracks. 'OpenGL > > > view' does display both, so it seems to be a problem here. > > > I use ROOT v 2.22/06. > > > > > > Dmitri Litvintsev > > > > > > /----------------------------------------------------------\ > > > | Tel: (630) 840 5005 | > > > | FAX: (630) 840 2968 | > > > | office: 169-E CDF Trailers | > > > | E-mail: litvinse@fnal.gov | > > > \----------------------------------------------------------/ > > >
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