G4RandomTools.hh File Reference

#include <CLHEP/Units/PhysicalConstants.h>
#include "globals.hh"
#include "Randomize.hh"
#include "G4RandomDirection.hh"

Go to the source code of this file.

Functions

G4ThreeVector G4LambertianRand (const G4ThreeVector &normal)

G4ThreeVector G4PlaneVectorRand (const G4ThreeVector &normal)

Function Documentation

G4ThreeVector G4LambertianRand ( const G4ThreeVector & normal ) [inline]

Definition at line 55 of file G4RandomTools.hh.

References G4RandomDirection(), and G4UniformRand.

00056 {
00057   G4ThreeVector vect;
00058   G4double ndotv;
00059 
00060   do
00061   {
00062     vect = G4RandomDirection();
00063     ndotv = normal * vect;
00064 
00065     if (ndotv < 0.0)
00066     {
00067       vect = -vect;
00068       ndotv = -ndotv;
00069     }
00070 
00071   } while (!(G4UniformRand() < ndotv));
00072 
00073   return vect;
00074 }

G4ThreeVector G4PlaneVectorRand ( const G4ThreeVector & normal ) [inline]

Definition at line 79 of file G4RandomTools.hh.

References G4UniformRand.

00080 {
00081   G4ThreeVector vec1 = normal.orthogonal();
00082   G4ThreeVector vec2 = vec1.cross(normal);
00083 
00084   G4double phi = CLHEP::twopi*G4UniformRand();
00085   G4double cosphi = std::cos(phi);
00086   G4double sinphi = std::sin(phi);
00087 
00088   return cosphi * vec1 + sinphi * vec2;
00089 }

Generated on Mon May 27 17:51:05 2013 for Geant4 by

1.4.7


Functions
G4ThreeVector	G4LambertianRand (const G4ThreeVector &normal)
G4ThreeVector	G4PlaneVectorRand (const G4ThreeVector &normal)