include/Geant4/G4NumIntTwoBodyAngDst.hh

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0025 //
0026 // Author:  Dennis Wright (SLAC)
0027 // Date:    28 January 2013
0028 //
0029 // Description: Templated base class for numerically integrated two-body
0030 //              final state angular distributions in Bertini-style cascade
0031 //
0032 // 20130219 M. Kelsey: Rewrite with C-arrays, using template args for
0033 //      dimensions (c.f. G4CascadeSampler)
0034 // 20130620 Address Coverity #51342; initialize angDist[] buffer in ctor
0035
0036 #ifndef G4NumIntTwoBodyAngDst_h
0037 #define G4NumIntTwoBodyAngDst_h 1
0038
0039 #include "G4VTwoBodyAngDst.hh"
0040 #include <algorithm>
0041
0042 template <G4int NKEBINS, G4int NANGLES>
0043 class G4NumIntTwoBodyAngDst : public G4VTwoBodyAngDst {
0044 public:
0045   enum { nDists=NKEBINS, nAngles=NANGLES }; // For use in function arguments
0046
0047   G4NumIntTwoBodyAngDst(const G4String& name,
0048             const G4double (&kebins)[nDists],
0049             const G4double (&angles)[nAngles],
0050             const G4double (&dists)[nDists][nAngles],
0051             const G4double highKEscale, G4int verbose = 0)
0052     : G4VTwoBodyAngDst(name, verbose), tcoeff(highKEscale),
0053       labKE(kebins), cosBins(angles), angDists(dists) {
0054     std::fill(angDist, angDist+nAngles, 0.);    // Initialize working buffer
0055   }
0056
0057   virtual ~G4NumIntTwoBodyAngDst() {;}
0058
0059   virtual G4double GetCosTheta(const G4double& ekin, const G4double& pcm) const;
0060
0061 protected:
0062   G4double tcoeff;  // Fall-off of exponential for high energy ang. dist.
0063
0064   // Kinetic energies at which angular distributions are taken
0065   const G4double (&labKE)[nDists];
0066
0067   // Bins of the angular distributions in cos(theta)
0068   const G4double (&cosBins)[nAngles];
0069
0070   // table of numerical normalized indefinite integrals of
0071   // angular distributions vs. KE and angle
0072   const G4double (&angDists)[nDists][nAngles];
0073
0074   // Compute interpolated angular distribution between energy bins
0075   void Interpolate(const G4double& ekin) const;
0076   mutable G4double angDist[nAngles];        // Reusable buffer
0077 };
0078
0079 // Implementations must be included for templated classes
0080 #include "G4NumIntTwoBodyAngDst.icc"
0081
0082 #endif  /* G4NumIntTwoBodyAngDst_h */