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na49geomfile.C File Reference
Tutorials » Geometry tutorials

Detailed Description

Before executing this macro, the file makegeometry.C must have been executed.

void na49geomfile() {
gBenchmark->Start("geometry");
TGeometry *n49 =(TGeometry*)gROOT->FindObject("na49");
if (n49) {
TFile na("na49.root","RECREATE");
n49->Write();
na.Write();
}
gBenchmark->Show("geometry");
}
gBenchmark
R__EXTERN TBenchmark * gBenchmark
Definition TBenchmark.h:59
gROOT
#define gROOT
Definition TROOT.h:407
TBenchmark::Start
virtual void Start(const char *name)
Starts Benchmark with the specified name.
Definition TBenchmark.cxx:172
TBenchmark::Show
virtual void Show(const char *name)
Stops Benchmark name and Prints results.
Definition TBenchmark.cxx:155
TFile
A ROOT file is composed of a header, followed by consecutive data records (TKey instances) with a wel...
Definition TFile.h:53
TGeometry
TGeometry description.
Definition TGeometry.h:39
TGeometry::FindObject
TObject * FindObject(const char *name) const override
Search object identified by name in the geometry tree.
Definition TGeometry.cxx:273
TObject::Write
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:880
Author
Andrei Gheata

Definition in file na49geomfile.C.