1 #include "AliRICHHelix.h" //class header
2 #include <TPolyLine3D.h> //Draw()
5 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
6 AliRICHHelix::AliRICHHelix(Double_t p,Double_t theta,Double_t phi,Double_t bz):TObject()
8 fX0.SetXYZ(0,0,0); fX=fX0;
9 fP0.SetMagThetaPhi(p,theta*TMath::DegToRad(),phi*TMath::DegToRad()); fP=fP0;
12 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
13 void AliRICHHelix::Print(Option_t *opt) const
16 Printf("%s helix for Q=%i in B=(0,0,%.2f) tesla",opt,fQ,fBz);
17 Printf("Helix parametrised @ x0=(%6.2f,%6.2f,%6.2f) cm p0=(%6.2f,%6.2f,%6.2f) GeV P=%.2f GeV Theta=%.2f Phi=%.2f degrees",
18 fX0.X(),fX0.Y(),fX0.Z(), fP0.Px(),fP0.Py(),fP0.Pz(), fP0.Mag(),fP0.Theta()*TMath::RadToDeg(),fP0.Phi()*TMath::RadToDeg());
19 Printf("@ %7.2f cm x=(%6.2f,%6.2f,%6.2f) cm p=(%6.2f,%6.2f,%6.2f) GeV P=%.2f GeV Theta=%.2f Phi=%.2f degrees",
20 fLen, fX.X(), fX.Y(), fX.Z(), fP.Px(),fP.Py(),fP.Pz(), fP.Mag(), fP.Theta()*TMath::RadToDeg(),fP.Phi()*TMath::RadToDeg());
21 Printf(" in LORS rad=(%5.2f,%5.2f) pc=(%5.2f,%5.2f)",fPosRad.X(), fPosRad.Y(),fPosPc.X(),fPosPc.Y());
23 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
24 void AliRICHHelix::Draw(const Option_t *)
26 // Draw helix by a set of points seperated by 1 cm distance
28 const Int_t kNpoints=500;
29 TPolyLine3D *pHelDraw = new TPolyLine3D(kNpoints); pHelDraw->SetLineColor(kGreen);
30 for(Int_t i=0;i<kNpoints;i++) {
32 pHelDraw->SetPoint(i,fX.X(),fX.Y(),fX.Z());