vtk/src/DetectorConstruction.cc

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0026 //
0027 /// \file B1/src/DetectorConstruction.cc
0028 /// \brief Implementation of the B1::DetectorConstruction class
0029
0030 #include "DetectorConstruction.hh"
0031
0032 #include "G4Box.hh"
0033 #include "G4LogicalVolume.hh"
0034 #include "G4NistManager.hh"
0035 #include "G4PVPlacement.hh"
0036 #include "G4RunManager.hh"
0037 #include "G4SubtractionSolid.hh"
0038 #include "G4SystemOfUnits.hh"
0039 #include "G4Tubs.hh"
0040
0041 #include <cmath>
0042
0043 namespace VtkVis
0044 {
0045
0046 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0047
0048 G4VPhysicalVolume* DetectorConstruction::Construct()
0049 {
0050   // Get nist material manager
0051   G4NistManager* nist = G4NistManager::Instance();
0052
0053   // Envelope parameters
0054   //
0055   G4double env_sizeXY = 10 * m, env_sizeZ = 10 * m;
0056   G4Material* env_mat = nist->FindOrBuildMaterial("G4_Galactic");
0057
0058   // Option to switch on/off checking of volumes overlaps
0059   //
0060   G4bool checkOverlaps = true;
0061
0062   //
0063   // World
0064   //
0065   G4double world_sizeXY = 1.2 * env_sizeXY;
0066   G4double world_sizeZ = 1.2 * env_sizeZ;
0067   G4Material* world_mat = nist->FindOrBuildMaterial("G4_AIR");
0068
0069   auto solidWorld =
0070     new G4Box("World",  // its name
0071               0.5 * world_sizeXY, 0.5 * world_sizeXY, 0.5 * world_sizeZ);  // its size
0072
0073   auto logicWorld = new G4LogicalVolume(solidWorld,  // its solid
0074                                         world_mat,  // its material
0075                                         "World");  // its name
0076
0077   auto physWorld = new G4PVPlacement(nullptr,  // no rotation
0078                                      G4ThreeVector(),  // at (0,0,0)
0079                                      logicWorld,  // its logical volume
0080                                      "World",  // its name
0081                                      nullptr,  // its mother  volume
0082                                      false,  // no boolean operation
0083                                      0,  // copy number
0084                                      checkOverlaps);  // overlaps checking
0085
0086   //
0087   // Envelope
0088   //
0089   auto solidEnv = new G4Box("Envelope",  // its name
0090                             0.5 * env_sizeXY, 0.5 * env_sizeXY, 0.5 * env_sizeZ);  // its size
0091
0092   auto logicEnv = new G4LogicalVolume(solidEnv,  // its solid
0093                                       env_mat,  // its material
0094                                       "Envelope");  // its name
0095
0096   new G4PVPlacement(nullptr,  // no rotation
0097                     G4ThreeVector(),  // at (0,0,0)
0098                     logicEnv,  // its logical volume
0099                     "Envelope",  // its name
0100                     logicWorld,  // its mother  volume
0101                     false,  // no boolean operation
0102                     0,  // copy number
0103                     checkOverlaps);  // overlaps checking
0104
0105   auto dumpPos = G4ThreeVector(0, 0, 0);
0106   auto dumpMat = nist->FindOrBuildMaterial("G4_CONCRETE");
0107   auto dumpShape1 = new G4Box("dumpShape1", 1 * m, 1 * m, 0.5 * m);
0108
0109   auto dumpCutoutPos = G4ThreeVector(0, 0, -5.1 * cm);
0110   auto dumpCutoutShape = new G4Tubs("DumpCutoutShape", 0 * cm, 10 * cm, 90 / 2 * cm, 0, 2 * M_PI);
0111
0112   auto dumpShape2 =
0113     new G4SubtractionSolid("dumpShape2", dumpShape1, dumpCutoutShape, 0, dumpCutoutPos);
0114
0115   auto dumpLogical = new G4LogicalVolume(dumpShape2,
0116                                          dumpMat,  // its material
0117                                          "dump");
0118   // its name
0119   new G4PVPlacement(nullptr,  // no rotation
0120                     dumpPos,  // at position
0121                     dumpLogical,  // its logical volume
0122                     "dump",  // its name
0123                     logicEnv,  // its mother  volume
0124                     false,  // no boolean operation
0125                     0,  // copy number
0126                     checkOverlaps);  // overlaps checking
0127
0128   fScoringVolume = dumpLogical;
0129
0130   //
0131   // always return the physical World
0132   //
0133   return physWorld;
0134 }
0135
0136 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0137
0138 }  // namespace VtkVis