Import Geant4 10.0.0 source tree

2016-06-10 11:51:14 +02:00
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+//
+// ********************************************************************
+// * License and Disclaimer                                           *
+// *                                                                  *
+// * The  Geant4 software  is  copyright of the Copyright Holders  of *
+// * the Geant4 Collaboration.  It is provided  under  the terms  and *
+// * conditions of the Geant4 Software License,  included in the file *
+// * LICENSE and available at  http://cern.ch/geant4/license .  These *
+// * include a list of copyright holders.                             *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.  Please see the license in the file  LICENSE  and URL above *
+// * for the full disclaimer and the limitation of liability.         *
+// *                                                                  *
+// * This  code  implementation is the result of  the  scientific and *
+// * technical work of the GEANT4 collaboration.                      *
+// * By using,  copying,  modifying or  distributing the software (or *
+// * any work based  on the software)  you  agree  to acknowledge its *
+// * use  in  resulting  scientific  publications,  and indicate your *
+// * acceptance of all terms of the Geant4 Software license.          *
+// ********************************************************************
+//
+//
+// $Id:$
+//
+// Class G4MTRandGeneral
+// 
+// Modified version with MT extensions
+// of corresponding CLHEP class RandGeneral
+
+// --------------------------------------------------------------------
+#ifndef G4MTRandGeneral_h
+#define G4MTRandGeneral_h 1
+
+#include <vector>
+
+#include "G4MTHepRandom.hh"
+
+class G4MTRandGeneral : public G4MTHepRandom
+{
+
+public:
+
+  G4MTRandGeneral ( const G4double* aProbFunc, 
+                    G4int theProbSize, 
+                    G4int IntType=0 );
+  G4MTRandGeneral ( CLHEP::HepRandomEngine& anEngine,
+                    const G4double* aProbFunc, 
+                    G4int theProbSize, 
+                    G4int IntType=0 );
+  G4MTRandGeneral ( CLHEP::HepRandomEngine* anEngine, 
+                    const G4double* aProbFunc, 
+                    G4int theProbSize, 
+                    G4int IntType=0 );
+  // These constructors should be used to instantiate a G4MTRandGeneral
+  // distribution object defining a local engine for it.
+  // The static generator will be skiped by using the non-static methods
+  // defined below. In case no engine is specified in the constructor, the
+  // default engine used by the static generator is applied.
+  // If the engine is passed by pointer the corresponding engine object
+  // will be deleted by the G4MTRandGeneral destructor.
+  // If the engine is passed by reference the corresponding engine object
+  // will not be deleted by the G4MTRandGeneral destructor.
+  // The probability distribution function (Pdf) must be provided by the user
+  // as an array of positive real number. The array size must also be
+  // provided. The Pdf doesn't need to be normalized to 1. 
+  // if IntType = 0 ( default value ) a uniform random number is
+  // generated using the engine. The uniform number is then transformed
+  // to the user's distribution using the cumulative probability
+  // distribution constructed from his histogram. The cumulative
+  // distribution is inverted using a binary search for the nearest
+  // bin boundary and a linear interpolation within the
+  // bin. G4MTRandGeneral therefore generates a constant density within
+  // each bin.
+  // if IntType = 1 no interpolation is performed and the result is a
+  // discrete distribution.
+
+  virtual ~G4MTRandGeneral();
+  // Destructor
+
+  // Methods to shoot random values using the static generator
+  // N.B.: The methods are NOT static since they use nonstatic members
+  // theIntegralPdf & nBins
+
+  inline G4double shoot();
+
+  inline void shootArray ( const G4int size, G4double* vect);
+
+  //  Methods to shoot random values using a given engine
+  //  by-passing the static generator.
+
+  G4double shoot( CLHEP::HepRandomEngine* anEngine );
+
+  void shootArray ( CLHEP::HepRandomEngine* anEngine, const G4int size,
+                    G4double* vect );
+    
+  //  Methods using the localEngine to shoot random values, by-passing
+  //  the static generator.
+
+  G4double fire();
+
+  void fireArray ( const G4int size, G4double* vect);
+
+  G4double operator()();
+
+private:
+
+  CLHEP::HepRandomEngine* localEngine;
+  G4bool deleteEngine;
+  std::vector<G4double> theIntegralPdf;
+  G4int nBins;
+  G4double oneOverNbins;
+  G4int InterpolationType;
+
+  // Private methods to factor out replicated implementation sections
+  void prepareTable(const G4double* aProbFunc);
+  void useFlatDistribution();
+  G4double mapRandom(G4double rand) const;
+
+};
+
+#include "G4MTRandGeneral.icc"
+
+#endif