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na49geomfile.C
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1/// \file
2/// \ingroup tutorial_geom
3/// Before executing this macro, the file makegeometry.C must have been executed
4///
5/// \macro_code
6///
7/// \author Andrei Gheata
8
9void na49geomfile() {
10 gBenchmark->Start("geometry");
11 TGeometry *n49 =(TGeometry*)gROOT->FindObject("na49");
12 if (n49) {
13 TFile na("na49.root","RECREATE");
14 n49->Write();
15 na.Write();
16 }
17 gBenchmark->Show("geometry");
18}
R__EXTERN TBenchmark * gBenchmark
Definition: TBenchmark.h:59
#define gROOT
Definition: TROOT.h:404
virtual void Start(const char *name)
Starts Benchmark with the specified name.
Definition: TBenchmark.cxx:172
virtual void Show(const char *name)
Stops Benchmark name and Prints results.
Definition: TBenchmark.cxx:155
A ROOT file is a suite of consecutive data records (TKey instances) with a well defined format.
Definition: TFile.h:54
TGeometry description.
Definition: TGeometry.h:39
virtual Int_t Write(const char *name=nullptr, Int_t option=0, Int_t bufsize=0)
Write this object to the current directory.
Definition: TObject.cxx:875