Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/g3tog4/src/G4gsrotm.cc

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  1 //
  2 // ********************************************************************
  3 // * License and Disclaimer                                           *
  4 // *                                                                  *
  5 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
  6 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
  7 // * conditions of the Geant4 Software License,  included in the file *
  8 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
  9 // * include a list of copyright holders.                             *
 10 // *                                                                  *
 11 // * Neither the authors of this software system, nor their employing *
 12 // * institutes,nor the agencies providing financial support for this *
 13 // * work  make  any representation or  warranty, express or implied, *
 14 // * regarding  this  software system or assume any liability for its *
 15 // * use.  Please see the license in the file  LICENSE  and URL above *
 16 // * for the full disclaimer and the limitation of liability.         *
 17 // *                                                                  *
 18 // * This  code  implementation is the result of  the  scientific and *
 19 // * technical work of the GEANT4 collaboration.                      *
 20 // * By using,  copying,  modifying or  distributing the software (or *
 21 // * any work based  on the software)  you  agree  to acknowledge its *
 22 // * use  in  resulting  scientific  publications,  and indicate your *
 23 // * acceptance of all terms of the Geant4 Software license.          *
 24 // ********************************************************************
 25 //
 26 //
 27 //
 28 #include "G3toG4.hh"
 29 #include "G3RotTable.hh"
 30 #include "G3toG4RotationMatrix.hh"
 31 #include "G4PhysicalConstants.hh"
 32 #include "G4ThreeVector.hh"
 33 
 34 void PG4gsrotm(G4String *tokens)
 35 {
 36     // fill the parameter containers
 37     G3fillParams(tokens,PTgsrotm);
 38 
 39     // interpret the parameters
 40     G4int irot = Ipar[0];
 41     
 42     // the angles in Geant are in degrees
 43     G4double theta1 = Rpar[0];
 44     G4double phi1   = Rpar[1];
 45     G4double theta2 = Rpar[2];
 46     G4double phi2   = Rpar[3];
 47     G4double theta3 = Rpar[4];
 48     G4double phi3   = Rpar[5];
 49 
 50     G4gsrotm(irot, theta1,phi1, theta2,phi2, theta3,phi3);
 51 }
 52 
 53 void G4gsrotm(G4int irot, G4double theta1, G4double phi1,
 54               G4double theta2, G4double phi2, G4double theta3, G4double phi3)
 55 {
 56     G4double degrad = pi/180;
 57     
 58     G4double th1r = theta1*degrad;
 59     G4double th2r = theta2*degrad;
 60     G4double th3r = theta3*degrad;
 61     
 62     G4double phi1r = phi1*degrad;
 63     G4double phi2r = phi2*degrad;
 64     G4double phi3r = phi3*degrad;
 65     
 66         // Construct unit vectors 
 67     
 68     G4ThreeVector x(std::sin(th1r)*std::cos(phi1r), std::sin(th1r)*std::sin(phi1r), std::cos(th1r));
 69     G4ThreeVector y(std::sin(th2r)*std::cos(phi2r), std::sin(th2r)*std::sin(phi2r), std::cos(th2r));
 70     G4ThreeVector z(std::sin(th3r)*std::cos(phi3r), std::sin(th3r)*std::sin(phi3r), std::cos(th3r));
 71 
 72         // check for orthonormality and left-handedness
 73 
 74     G4double check = (x.cross(y))*z;
 75     G4double tol = 1.0e-3;
 76         
 77     if (1-std::abs(check)>tol) {
 78         G4cerr << "Coordinate axes forming rotation matrix "
 79                << irot << " are not orthonormal.(" << 1-std::abs(check) << ")" 
 80          << G4endl;
 81         G4cerr << " theta1=" << theta1;
 82         G4cerr << " phi1=" << phi1;
 83         G4cerr << " theta2=" << theta2;
 84         G4cerr << " phi2=" << phi2;
 85         G4cerr << " theta3=" << theta3;
 86         G4cerr << " phi3=" << phi3;
 87         G4cerr << G4endl;
 88         G4Exception("G4gsrotm()", "G3toG40023", FatalException,
 89                     "Non orthogonal axes!");
 90         return;
 91     }
 92     //else if (1+check<=tol) {
 93     //    G4cerr << "G4gsrotm warning: coordinate axes forming rotation "
 94     //           << "matrix " << irot << " are left-handed" << G4endl;
 95     //}
 96     
 97     G3toG4RotationMatrix* rotp = new G3toG4RotationMatrix;
 98 
 99     rotp->SetRotationMatrixByRow(x, y, z);
100     
101         // add it to the List
102 
103     G3Rot.Put(irot, rotp);
104 }
105