1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // $Id: G4LorentzConvertor.hh,v 1.15 2010/05/21 17:56:34 mkelsey Exp $ |
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26 | // Geant4 tag: $Name: geant4-09-04-beta-cand-01 $ |
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27 | // |
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28 | // 20100108 Michael Kelsey -- Use G4LorentzVector internally |
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29 | // 20100120 M. Kelsey -- BUG FIX: scm_momentum should be G4ThreeVector |
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30 | // 20100126 M. Kelsey -- Remove G4CascadeMomentum, use G4LorentzVector directly |
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31 | // 20100519 M. Kelsey -- Add interfaces to pass G4InuclParticles directly |
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32 | |
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33 | #ifndef G4LORENTZ_CONVERTOR_HH |
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34 | #define G4LORENTZ_CONVERTOR_HH |
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35 | |
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36 | #include "globals.hh" |
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37 | #include "G4LorentzVector.hh" |
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38 | #include "G4ThreeVector.hh" |
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39 | |
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40 | class G4InuclParticle; |
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41 | |
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42 | class G4LorentzConvertor { |
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43 | |
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44 | public: |
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45 | |
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46 | G4LorentzConvertor(); |
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47 | |
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48 | G4LorentzConvertor(const G4LorentzVector& bmom, G4double bmass, |
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49 | const G4LorentzVector& tmom, G4double tmass) { |
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50 | setBullet(bmom, bmass); |
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51 | setTarget(tmom, tmass); |
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52 | } |
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53 | |
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54 | G4LorentzConvertor(const G4InuclParticle* bullet, |
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55 | const G4InuclParticle* target) { |
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56 | setBullet(bullet); |
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57 | setTarget(target); |
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58 | } |
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59 | |
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60 | void setVerbose(G4int vb=0) { verboseLevel = vb; } |
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61 | |
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62 | void setBullet(const G4InuclParticle* bullet); |
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63 | void setTarget(const G4InuclParticle* target); |
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64 | |
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65 | void setBullet(const G4InuclParticle& bullet) { setBullet(&bullet); } |
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66 | void setTarget(const G4InuclParticle& target) { setTarget(&target); } |
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67 | |
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68 | // Use correct four-vectors as input |
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69 | void setBullet(const G4LorentzVector& bmom) { bullet_mom = bmom; } |
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70 | void setTarget(const G4LorentzVector& bmom) { target_mom = bmom; } |
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71 | |
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72 | // NOTE: These functions "repair" input 4-vectors using specified mass |
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73 | void setBullet(const G4LorentzVector& bmom, G4double bmass) { |
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74 | bullet_mom.setVectM(bmom.vect(), bmass); |
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75 | |
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76 | // G4cout << " bullet: e " << bullet_mom.e() << " mass " |
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77 | // << bullet_mom.m() << G4endl; |
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78 | }; |
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79 | |
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80 | void setTarget(const G4LorentzVector& tmom, G4double tmass) { |
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81 | target_mom.setVectM(tmom.vect(), tmass); |
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82 | |
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83 | // G4cout << " target: e " << target_mom.e() << " mass " |
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84 | // << target_mom.m() << G4endl; |
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85 | }; |
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86 | |
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87 | void toTheCenterOfMass(); |
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88 | void toTheTargetRestFrame(); |
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89 | |
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90 | G4LorentzVector backToTheLab(const G4LorentzVector& mom) const; |
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91 | |
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92 | // Four-vectors of bullet and target in last chosen reference frame |
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93 | const G4LorentzVector& getBullet() const { return bullet_mom; } |
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94 | const G4LorentzVector& getTarget() const { return target_mom; } |
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95 | |
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96 | G4double getKinEnergyInTheTRS() const; |
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97 | G4double getTotalSCMEnergy() const { return ecm_tot; } |
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98 | G4double getSCMMomentum() const { return scm_momentum.rho(); } |
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99 | G4double getTRSMomentum() const; |
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100 | |
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101 | G4LorentzVector rotate(const G4LorentzVector& mom) const; |
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102 | |
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103 | G4LorentzVector rotate(const G4LorentzVector& mom1, |
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104 | const G4LorentzVector& mom) const; |
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105 | |
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106 | G4bool reflectionNeeded() const; |
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107 | |
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108 | G4bool trivial() const { return degenerated; } |
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109 | |
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110 | private: |
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111 | static const G4double small; |
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112 | |
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113 | G4int verboseLevel; |
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114 | G4LorentzVector bullet_mom; |
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115 | G4LorentzVector target_mom; |
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116 | |
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117 | G4LorentzVector scm_momentum; // CM momentum relative to target/bullet |
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118 | |
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119 | // Buffer variables for doing ::rotate() calculations |
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120 | G4ThreeVector velocity; |
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121 | G4double gamma; |
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122 | G4double v2; |
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123 | G4double ecm_tot; |
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124 | G4double ga; |
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125 | G4double gb; |
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126 | G4double gbpp; |
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127 | G4double gapp; |
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128 | G4bool degenerated; |
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129 | }; |
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130 | |
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131 | #endif // G4LORENTZ_CONVERTOR_HH |
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