void Mpdshape::SetPosition(TVector3 vec) { ostringstream o; o.precision(6); o.setf(ios::showpoint); o.setf(ios::fixed); o << vec.x() << " " << vec.y() << " " << vec.z(); fPosition.append(o.str().c_str()); }
void tv3Read2() { //second read example illustrating how to read one branch only TVector3 *v = 0; TFile *f = new TFile("v3.root"); TTree *T = (TTree*)f->Get("T"); T->SetBranchAddress("v3",&v); TBranch *by = T->GetBranch("fY"); TH1F *h2 = new TH1F("y","y component of TVector3",100,-5,20); Int_t nentries = Int_t(T->GetEntries()); for (Int_t i=0;i<nentries;i++) { by->GetEntry(i); h2->Fill(v->y()); } h2->Draw(); }
void qaP3(TString pre, TVector3 v, RhoTuple *n, bool skip=false){ if (n==0) return; if(!skip){ n->Column(pre+"decayvx", (Float_t) v.x(), 0.0f); n->Column(pre+"decayvy", (Float_t) v.y(), 0.0f); n->Column(pre+"decayvz", (Float_t) v.z(), 0.0f); } else{ n->Column(pre+"decayvx", (Float_t) -999, 0.0f); n->Column(pre+"decayvy", (Float_t) -999, 0.0f); n->Column(pre+"decayvz", (Float_t) -999, 0.0f); } }
double distance2(double px,double py,double pz, double *p) { TVector3 xp(px,py,pz); TVector3 x0(p[0], p[1], p[2]); TVector3 u (TMath::Sin(p[3])*TMath::Cos(p[4]), TMath::Sin(p[3])*TMath::Sin(p[4]), TMath::Cos(p[3])); double coeff = u*(xp-x0); TVector3 n = xp - x0 - coeff * u; double dx = n.x(); double dy = n.y(); double dz = n.z(); double d2_x = TMath::Power(dx/weight[0], 2); double d2_y = TMath::Power(dy/weight[1], 2); double d2_z = TMath::Power(dz/weight[2], 2); double d2 = d2_x + d2_y + d2_z; return d2; }
void KVGeoNavigator::PropagateParticle(KVNucleus* part, TVector3* TheOrigin) { // Propagate a particle through the geometry in the direction of its momentum, // until we reach the boundary of the geometry, or until fStopPropagation is set to kFALSE. // Propagation will also stop if we encounter a volume whose name begins with "DEADZONE" // Define point of origin of particles if (TheOrigin) fGeometry->SetCurrentPoint(TheOrigin->X(), TheOrigin->Y(), TheOrigin->Z()); else fGeometry->SetCurrentPoint(0., 0., 0.); // unit vector in direction of particle's momentum TVector3 v = part->GetMomentum().Unit(); // use particle's momentum direction fGeometry->SetCurrentDirection(v.x(), v.y(), v.z()); fGeometry->FindNode(); fCurrentVolume = fGeometry->GetCurrentVolume(); fCurrentNode = fGeometry->GetCurrentNode(); fMotherNode = fGeometry->GetMother(); fCurrentMatrix = *(fGeometry->GetCurrentMatrix()); fCurrentPath = fGeometry->GetPath(); // move along trajectory until we hit a new volume fGeometry->FindNextBoundaryAndStep(); fStepSize = fGeometry->GetStep(); TGeoVolume* newVol = fGeometry->GetCurrentVolume(); TGeoNode* newNod = fGeometry->GetCurrentNode(); TGeoNode* newMom = fGeometry->GetMother(); TGeoHMatrix* newMatx = fGeometry->GetCurrentMatrix(); TString newPath = fGeometry->GetPath(); Double_t XX, YY, ZZ; XX = YY = ZZ = 0.; // reset user flag for stopping propagation of particle SetStopPropagation(kFALSE); // Info("PropagateParticle","Beginning: i am in %s on node %s with path %s, and matrix:", // fCurrentVolume->GetName(),fCurrentNode->GetName(),fCurrentPath.Data()); // fCurrentMatrix.Print(); // track particle until we leave the geometry or until fStopPropagation // becomes kTRUE while (!fGeometry->IsOutside()) { const Double_t* posi = fGeometry->GetCurrentPoint(); fEntryPoint.SetXYZ(XX, YY, ZZ); XX = posi[0]; YY = posi[1]; ZZ = posi[2]; fExitPoint.SetXYZ(XX, YY, ZZ); TString vn = GetCurrentVolume()->GetName(); if (vn.BeginsWith("DEADZONE")) { part->GetParameters()->SetValue("DEADZONE", Form("%s/%s", GetCurrentVolume()->GetName(), GetCurrentNode()->GetName())); break; } // Info("PropagateParticle","just before ParticleEntersNewVolume\nnow i am in %s on node %s with path %s and matrix:", // fCurrentVolume->GetName(),fCurrentNode->GetName(),fCurrentPath.Data()); // fCurrentMatrix.Print(); ParticleEntersNewVolume(part); if (StopPropagation()) break; fCurrentVolume = newVol; fCurrentNode = newNod; fMotherNode = newMom; fCurrentMatrix = *newMatx; fCurrentPath = newPath; // Info("PropagateParticle","after ParticleEntersNewVolume\nnow i am in %s on node %s with path %s and matrix:", // fCurrentVolume->GetName(),fCurrentNode->GetName(),fCurrentPath.Data()); // fCurrentMatrix.Print(); // move on to next volume crossed by trajectory fGeometry->FindNextBoundaryAndStep(); fStepSize = fGeometry->GetStep(); newVol = fGeometry->GetCurrentVolume(); newNod = fGeometry->GetCurrentNode(); newMom = fGeometry->GetMother(); newMatx = fGeometry->GetCurrentMatrix(); newPath = fGeometry->GetPath(); } }
void rotate_3vector(void){ PI = TMath::Pi(); TVector3 beam = TVector3(0.,0.,1.); TVector3 scat = TVector3(0.2,0.4,1.); std::cout << "beam x : " << beam.x() << std::endl; std::cout << "beam y : " << beam.y() << std::endl; std::cout << "beam z : " << beam.z() << std::endl; std::cout << "scat x : " << scat.x() << std::endl; std::cout << "scat y : " << scat.y() << std::endl; std::cout << "scat z : " << scat.z() << std::endl; double bx=beam.x(); double by=beam.y(); double bz=beam.z(); double sx=scat.x(); double sy=scat.y(); double sz=scat.z(); double theta = acos((bx*sx + by*sy + bz*sz)/sqrt(bx*bx + by*by + bz*bz)/sqrt(sx*sx + sy*sy + sz*sz)); double theta_ = acos(sz/sqrt(sx*sx+sy*sy+sz*sz)); std::cout << "theta : " << theta << std::endl; std::cout << "theta_ : " << theta_ << std::endl; TVector3 beam2 = TVector3(0, 1, 0); double bx2=beam2.x(); double by2=beam2.y(); double bz2=beam2.z(); std::cout << "beam2 x (nom) : " << beam2.x()/sqrt(bx2*bx2+by2*by2+bz2*bz2) << std::endl; std::cout << "beam2 y (nom) : " << beam2.y()/sqrt(bx2*bx2+by2*by2+bz2*bz2) << std::endl; std::cout << "beam2 z (nom) : " << beam2.z()/sqrt(bx2*bx2+by2*by2+bz2*bz2) << std::endl; double theta_tmp = - atan(by2/sqrt(bx2*bx2 + bz2*bz2)); double phi_tmp = atan2(bx2, bz2); std::cout << "theta_tmp : " << theta_tmp << std::endl; std::cout << "phi_tmp : " << phi_tmp << std::endl; beam.RotateX(theta_tmp); beam.RotateY(phi_tmp); scat.RotateX(theta_tmp); scat.RotateY(phi_tmp); bx=beam.x(); by=beam.y(); bz=beam.z(); sx=scat.x(); sy=scat.y(); sz=scat.z(); std::cout << "roteta beam x : " << bx << std::endl; std::cout << "roteta beam y : " << by << std::endl; std::cout << "roteta beam z : " << bz << std::endl; std::cout << "roteta scat x : " << sx << std::endl; std::cout << "roteta scat y : " << sy << std::endl; std::cout << "roteta scat z : " << sz << std::endl; double theta_rotate = acos((bx*sx + by*sy + bz*sz)/sqrt(bx*bx + by*by + bz*bz)/sqrt(sx*sx + sy*sy + sz*sz)); std::cout << "===========================" << std::endl; std::cout << "theta : " << theta << std::endl; std::cout << "theta_rotate : " << theta_rotate << std::endl; }