| 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 | // File name: RadmonGeneratorUniformSphere.cc |
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| 28 | // Creation date: Oct 2005 |
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| 29 | // Main author: Riccardo Capra <capra@ge.infn.it> |
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| 30 | // |
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| 31 | // Id: $Id: RadmonGeneratorUniformSphere.cc,v 1.4 2006/06/29 16:16:35 gunter Exp $ |
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| 32 | // Tag: $Name: $ |
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| 33 | // |
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| 34 | |
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| 35 | // Include files |
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| 36 | #include "RadmonGeneratorUniformSphere.hh" |
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| 37 | #include "G4ParticleGun.hh" |
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| 38 | #include "G4RotationMatrix.hh" |
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| 39 | #include "Randomize.hh" |
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| 40 | |
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| 41 | void RadmonGeneratorUniformSphere :: ConvolveParticleGun(G4ParticleGun & gun) |
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| 42 | { |
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| 43 | G4double radius(GetAttributeAsMeasure("Radius", "Length", -1.)); |
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| 44 | |
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| 45 | if (radius<0) |
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| 46 | { |
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| 47 | G4cout << "RadmonGeneratorUniformSphere::ConvolveParticleGun: \"Radius\" not defined." << G4endl; |
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| 48 | return; |
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| 49 | } |
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| 50 | |
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| 51 | G4double phi(twopi*G4UniformRand()); |
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| 52 | G4double cosTheta(2.*G4UniformRand()-1.); |
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| 53 | |
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| 54 | G4ThreeVector direction; |
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| 55 | direction.setRThetaPhi(1., std::acos(cosTheta), phi); |
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| 56 | |
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| 57 | G4RotationMatrix rotation(G4RotationMatrix::IDENTITY); |
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| 58 | rotation.rotateY(direction.getTheta()); |
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| 59 | rotation.rotateZ(phi); |
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| 60 | |
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| 61 | direction*=radius; |
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| 62 | |
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| 63 | gun.SetParticleMomentumDirection(rotation * gun.GetParticleMomentumDirection()); |
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| 64 | gun.SetParticlePosition(gun.GetParticlePosition()+direction); |
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| 65 | } |
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| 66 | |
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| 67 | |
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| 68 | |
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| 69 | RadmonVGeneratorWithLabel * RadmonGeneratorUniformSphere :: New(void) const |
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| 70 | { |
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| 71 | return new RadmonGeneratorUniformSphere; |
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| 72 | } |
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