Need an example that can covert data to tevetrack and tevepointset for jsroot

Newbie
4

Sorry, it took me some time to learn how to save TList. Your advice help me a lot! I put the simplest example below that can generate some random data and save as root file. By the way, what are the differences between TPolyLine3D & TGeoTrack & TEveTrack and TPolyMarker3D & TEvePointSet? They look same in JSROOT. What do you recommend for event displayer?

Thank you,
Aiyu

void random_hits_tracks()
{
    const Int_t n_hits = 150;
    TPolyMarker3D *hits = new TPolyMarker3D(n_hits, 1);

    Double_t x, y, z;
    auto r = new TRandom();

    hits->SetMarkerColor(kGreen);
    for (Int_t i=0;i<n_hits;i++) {
        r->Sphere(x, y, z, 30);
        hits->SetPoint(i,x+1,y+1,z+1);
    }

    const Int_t n_tracks_points = 150;
    const Int_t scale_tracks = 10;
    TPolyLine3D *tracks = new TPolyLine3D(n_tracks_points);
    for (Int_t i=0;i<n_tracks_points;i++) {
        tracks->SetPoint(i,scale_tracks*std::sin(.1*i),scale_tracks*std::cos(.1*i),0.1*i);
    }

    tracks->SetLineColor(kRed);
    // tracks->SetLineWidth(20); //doesn't work
    

    TFile* f = new TFile("random_hits_tracks.root", "recreate");
    TList* fList_hits = new TList();
    fList_hits->Add(hits,"testhit1");
    TList* fList_tracks = new TList();
    fList_tracks->Add(tracks,"testtrack1");
    
    f->cd();
    fList_hits->Write("testhit", 1);
    fList_tracks->Write("testtrack", 1);
    f->Close();
}