[1350] | 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 | // |
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| 26 | // |
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| 27 | // $Id: testG4NavigatorSafety.cc,v 1.6 2010/11/09 10:48:27 gcosmo Exp $ |
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| 28 | // GEANT4 tag $Name: geant4-09-04-ref-00 $ |
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| 29 | // |
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| 30 | // |
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| 31 | // Create a tubular "calorimeter". Generate random points along x, y & z |
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| 32 | // axes, printing location, steps & safeties. Compare results of standard |
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| 33 | // voxel safety calculations with "exact safety" computed values. |
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| 34 | // |
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| 35 | // Optional arguments: |
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| 36 | // - Number of points to generate [Default: 10000] |
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| 37 | // - Initial random seed modulo 256 [Default: CLHEP default] |
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| 38 | |
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| 39 | #include <assert.h> |
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| 40 | #include "G4ios.hh" |
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| 41 | #include <stdlib.h> |
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| 42 | #include <vector> |
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| 43 | |
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| 44 | #include "globals.hh" |
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| 45 | |
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| 46 | #include "G4Timer.hh" |
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| 47 | #include "ApproxEqual.hh" |
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| 48 | |
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| 49 | #include "G4Navigator.hh" |
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| 50 | |
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| 51 | #include "G4LogicalVolume.hh" |
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| 52 | #include "G4VPhysicalVolume.hh" |
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| 53 | #include "G4PVPlacement.hh" |
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| 54 | #include "G4Box.hh" |
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| 55 | #include "G4Tubs.hh" |
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| 56 | |
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| 57 | #include "G4GeometryManager.hh" |
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| 58 | |
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| 59 | #include "G4RotationMatrix.hh" |
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| 60 | #include "G4ThreeVector.hh" |
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| 61 | #include "Randomize.hh" |
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| 62 | |
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| 63 | // Parameters for building a tubular calorimeter: |
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| 64 | // an array of interlocking complete tubes inside a box |
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| 65 | // |
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| 66 | static const G4double kTubeHalfHeight = 10*mm; |
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| 67 | static const G4double kTubeRadius = 5*mm; |
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| 68 | static const G4double kTubeNoRow = 10; |
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| 69 | static const G4double kTubeNoColumn = 11; // Odd for symmetrical array |
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| 70 | |
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| 71 | static const G4double kBoxDx=kTubeNoRow*kTubeRadius; |
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| 72 | static const G4double yDelta=2.0*kTubeRadius*std::sin(pi/3.0); |
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| 73 | static const G4double kBoxDy=(kTubeNoColumn-1)*yDelta*0.5+kTubeRadius; |
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| 74 | static const G4double kBoxDz=kTubeHalfHeight; |
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| 75 | static const G4double kWorldhxsize = kBoxDx+0.1*mm; |
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| 76 | static const G4double kWorldhysize = kBoxDy+0.1*mm; |
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| 77 | static const G4double kWorldhzsize = kBoxDz+0.1*mm; |
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| 78 | |
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| 79 | G4bool compare = false; |
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| 80 | std::vector<G4ThreeVector> kPoints; |
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| 81 | std::vector<std::pair<G4double, G4double> > kSafeties; |
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| 82 | |
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| 83 | G4VPhysicalVolume* BuildGeometry() |
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| 84 | { |
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| 85 | G4double bigXStart=-(kTubeNoRow-1)*kTubeRadius; |
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| 86 | G4double smallXStart=bigXStart+kTubeRadius; |
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| 87 | |
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| 88 | G4double bigYStart=-(kTubeNoColumn-1)*yDelta*0.5; |
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| 89 | G4double smallYStart=bigYStart+yDelta; |
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| 90 | |
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| 91 | G4int row,column; |
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| 92 | |
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| 93 | // Solids ============================== |
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| 94 | G4Box *worldBox = new G4Box ("World Box",kWorldhxsize,kWorldhysize,kWorldhzsize); |
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| 95 | // World box |
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| 96 | |
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| 97 | G4Box *calBox = new G4Box ("Cal Box",kBoxDx,kBoxDy,kBoxDz); |
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| 98 | G4Tubs *calTube = new G4Tubs("Cal Tube",0,kTubeRadius,kTubeHalfHeight,0,360); |
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| 99 | |
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| 100 | // Logical Volumes ------------------------------ |
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| 101 | G4LogicalVolume *myWorldLog= |
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| 102 | new G4LogicalVolume(worldBox,0,"World",0,0,0); |
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| 103 | // Logical with no material,field, sensitive detector or user limits |
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| 104 | |
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| 105 | G4PVPlacement *myWorldPhys= |
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| 106 | new G4PVPlacement(0,G4ThreeVector(0,0,0),"World",myWorldLog,0,false,0); |
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| 107 | // World physical volume |
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| 108 | |
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| 109 | G4LogicalVolume *myDetectorLog= |
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| 110 | new G4LogicalVolume(calBox,0,"DetectorLog",0,0,0); |
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| 111 | // Logical with no material,field, sensitive detector or user limits |
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| 112 | |
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| 113 | G4PVPlacement *myDetectorPhys= |
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| 114 | new G4PVPlacement(0,G4ThreeVector(0,0,0),"DetectorPhys", |
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| 115 | myDetectorLog,myWorldPhys,false,0); |
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| 116 | // Detector physical volume placed in the world |
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| 117 | |
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| 118 | G4LogicalVolume *calTubLog= |
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| 119 | new G4LogicalVolume(calTube,0,"Cal Crystal",0,0,0); |
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| 120 | |
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| 121 | G4String tname("Target"); |
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| 122 | G4int copyNo=0; |
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| 123 | for (column=0;column<kTubeNoColumn;column+=2) |
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| 124 | { |
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| 125 | for (row=0;row<kTubeNoRow;row++) |
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| 126 | { |
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| 127 | // G4PVPlacement *calPhys= |
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| 128 | new G4PVPlacement(0,G4ThreeVector(bigXStart+row*kTubeRadius*2.0, |
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| 129 | bigYStart+column*yDelta,0), |
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| 130 | tname,calTubLog,myDetectorPhys,false,copyNo++); |
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| 131 | } |
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| 132 | } |
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| 133 | for (column=0;column<kTubeNoColumn-1;column+=2) |
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| 134 | { |
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| 135 | for (row=0;row<kTubeNoRow-1;row++) |
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| 136 | { |
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| 137 | // G4PVPlacement *calPhys= |
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| 138 | new G4PVPlacement(0,G4ThreeVector(smallXStart+row*kTubeRadius*2.0, |
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| 139 | smallYStart+column*yDelta), |
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| 140 | tname,calTubLog,myDetectorPhys,false,copyNo++); |
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| 141 | } |
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| 142 | } |
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| 143 | return myWorldPhys; |
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| 144 | } |
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| 145 | |
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| 146 | void generatePoints(G4int n) |
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| 147 | { |
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| 148 | for (int i=0; i<n; i++) |
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| 149 | { |
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| 150 | G4ThreeVector p(CLHEP::RandFlat::shoot(-kWorldhxsize,kWorldhxsize), |
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| 151 | CLHEP::RandFlat::shoot(-kWorldhysize,kWorldhysize), |
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| 152 | CLHEP::RandFlat::shoot(-kWorldhzsize,kWorldhzsize)); |
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| 153 | kPoints.push_back(p); |
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| 154 | } |
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| 155 | } |
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| 156 | |
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| 157 | void computeApproxSafeties(G4VPhysicalVolume *pTopNode) |
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| 158 | { |
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| 159 | MyNavigator myNav; |
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| 160 | myNav.SetWorldVolume(pTopNode); |
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| 161 | std::vector<G4ThreeVector>::const_iterator pos; |
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| 162 | for (pos=kPoints.begin(); pos!=kPoints.end(); pos++) |
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| 163 | { |
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| 164 | myNav.LocateGlobalPointAndSetup(*pos); |
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| 165 | G4double safety = myNav.ComputeSafety(*pos); |
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| 166 | std::pair<G4double,G4double> s(safety,0.); |
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| 167 | kSafeties.push_back(s); |
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| 168 | } |
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| 169 | } |
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| 170 | |
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| 171 | void computeExactSafeties(G4VPhysicalVolume *pTopNode) |
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| 172 | { |
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| 173 | G4int i=0; |
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| 174 | G4VPhysicalVolume *pPhysVol=0; |
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| 175 | |
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| 176 | MyNavigator myNav; |
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| 177 | myNav.SetWorldVolume(pTopNode); |
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| 178 | |
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| 179 | // Enable use of Best Safety Estimate -- ie as exact as solids allow |
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| 180 | myNav.UseBestSafety( true ); |
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| 181 | |
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| 182 | myNav.SetVerboseLevel( 1 ); |
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| 183 | myNav.CheckMode( true ); |
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| 184 | |
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| 185 | G4ThreeVector center( 0., 0., 0. ); |
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| 186 | G4cout << " Trial point= " << center << G4endl; |
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| 187 | pPhysVol= myNav.LocateGlobalPointAndSetup( center ); |
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| 188 | // G4double saf= myNav.ComputeSafety( center ); |
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| 189 | |
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| 190 | std::vector<G4ThreeVector>::const_iterator pos; |
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| 191 | for (pos=kPoints.begin(); pos!=kPoints.end(); pos++) |
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| 192 | { |
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| 193 | G4cout << " Trial point= " << *pos << G4endl; |
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| 194 | // Relocate point |
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| 195 | pPhysVol= myNav.LocateGlobalPointAndSetup(*pos); |
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| 196 | |
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| 197 | G4cout << G4endl; |
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| 198 | G4cout << " ============================================== " << G4endl; |
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| 199 | G4cout << " Calculating 'exact' safety for " << *pos << G4endl; |
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| 200 | G4double safety = myNav.ComputeSafety(*pos); |
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| 201 | kSafeties[i].second = safety; |
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| 202 | |
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| 203 | G4cout << " Old safety = " << kSafeties[i].first << G4endl; |
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| 204 | G4cout << " Exact safety = " << safety << G4endl; |
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| 205 | |
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| 206 | i++; |
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| 207 | } |
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| 208 | compare = true; |
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| 209 | } |
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| 210 | |
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| 211 | void compareSafeties() |
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| 212 | { |
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| 213 | G4int n = kPoints.size(); |
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| 214 | if (!compare) |
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| 215 | { |
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| 216 | G4cout << "Printing out non-zero safety values computed ..." << G4endl; |
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| 217 | for (G4int i=0; i<n; i++) |
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| 218 | { |
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| 219 | G4double safety = kSafeties[i].first; |
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| 220 | if (safety) |
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| 221 | { |
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| 222 | G4cout << i << ". - Point: " << kPoints[i] |
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| 223 | << " - Safety: " << safety << G4endl; |
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| 224 | } |
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| 225 | } |
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| 226 | } |
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| 227 | else |
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| 228 | { |
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| 229 | G4int diffs=0; |
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| 230 | G4cout << "Printing out cases of different safety values ..." << G4endl; |
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| 231 | for (G4int i=0; i<n; i++) |
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| 232 | { |
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| 233 | if (kSafeties[i].first != kSafeties[i].second) |
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| 234 | { |
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| 235 | G4cout << i << ". - Point: " << kPoints[i] |
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| 236 | << " - Approx safety: " << kSafeties[i].first |
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| 237 | << " - Exact safety: " << kSafeties[i].second << G4endl; |
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| 238 | diffs++; |
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| 239 | } |
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| 240 | } |
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| 241 | G4cout << "Total number of differences: " << diffs << G4endl; |
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| 242 | } |
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| 243 | } |
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| 244 | |
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| 245 | int main(int argc, char* argv[]) |
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| 246 | { |
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| 247 | G4Timer timer; |
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| 248 | G4int iter=10000; |
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| 249 | |
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| 250 | if (argc==2) |
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| 251 | { |
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| 252 | G4int num = atoi(argv[1]); |
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| 253 | if (num>=0) { iter = num; } |
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| 254 | else { G4cout << ">>> Invalid number of iterations in input!" << G4endl |
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| 255 | << " Sticking to: " << iter << " ..." << G4endl; } |
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| 256 | } |
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| 257 | else if (argc==3) |
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| 258 | { |
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| 259 | G4int num = atoi(argv[1]); |
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| 260 | if (num>=0) { iter = num; } |
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| 261 | else { G4cout << ">>> Invalid number of iterations in input!" << G4endl |
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| 262 | << " Sticking to: " << iter << " ..." << G4endl; } |
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| 263 | G4long seed = atoi(argv[2]); |
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| 264 | if (seed>0) { CLHEP::HepRandom::setTheSeed(seed); } |
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| 265 | else { G4cout << ">>> Invalid negative random seed in input!" << G4endl |
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| 266 | << " Sticking to default: " |
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| 267 | << CLHEP::HepRandom::getTheSeed() << " ..." << G4endl; } |
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| 268 | } |
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| 269 | |
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| 270 | G4VPhysicalVolume *myTopNode; |
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| 271 | myTopNode=BuildGeometry(); // Build the geometry |
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| 272 | // Do not close the geometry --> the voxels will limit safety |
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| 273 | |
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| 274 | timer.Start(); |
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| 275 | |
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| 276 | generatePoints(iter); |
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| 277 | |
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| 278 | computeApproxSafeties(myTopNode); |
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| 279 | |
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| 280 | G4GeometryManager::GetInstance()->CloseGeometry(); // Voxelise the geometry |
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| 281 | computeExactSafeties(myTopNode); |
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| 282 | |
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| 283 | // Check |
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| 284 | compareSafeties(); |
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| 285 | |
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| 286 | timer.Stop(); |
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| 287 | |
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| 288 | G4cout << timer << G4endl; |
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| 289 | |
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| 290 | G4GeometryManager::GetInstance()->OpenGeometry(); |
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| 291 | |
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| 292 | return 0; |
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| 293 | } |
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