include/Geant4/G4IntersectingCone.hh

0001 //
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0003 // * License and Disclaimer                                           *
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0025 //
0026 // G4IntersectingCone
0027 //
0028 // Class description:
0029 //
0030 //   Utility class which calculates the intersection
0031 //   of an arbitrary line with a fixed cone
0032
0033 // Author: David C. Williams (davidw@scipp.ucsc.edu)
0034 // --------------------------------------------------------------------
0035 #ifndef G4INTERSECTINGCONE_HH
0036 #define G4INTERSECTINGCONE_HH
0037
0038 #include "G4Types.hh"
0039 #include "geomdefs.hh"
0040 #include "G4ThreeVector.hh"
0041
0042 class G4IntersectingCone
0043 {
0044   public:
0045
0046     G4IntersectingCone( const G4double r[2], const G4double z[2] );
0047     virtual ~G4IntersectingCone();
0048
0049     G4int LineHitsCone( const G4ThreeVector& p, const G4ThreeVector& v,
0050                               G4double* s1, G4double* s2 );
0051
0052     G4bool HitOn( const G4double r, const G4double z );
0053
0054     inline G4double RLo() const { return rLo; }
0055     inline G4double RHi() const { return rHi; }
0056     inline G4double ZLo() const { return zLo; }
0057     inline G4double ZHi() const { return zHi; }
0058
0059     G4IntersectingCone(__void__&);
0060       // Fake default constructor for usage restricted to direct object
0061       // persistency for clients requiring preallocation of memory for
0062       // persistifiable objects.
0063
0064
0065   protected:
0066
0067     G4double zLo, zHi,  // Z bounds of side
0068              rLo, rHi;  // R bounds of side
0069
0070     G4bool type1 = false;    // True if cone is type 1
0071                              // (std::fabs(z1-z2)>std::fabs(r1-r2))
0072     G4double A, B;     // Cone radius parameter:
0073                        //  type 1: r = A + B*z
0074                        //  type 2: z = A + B*r
0075
0076     G4int LineHitsCone1( const G4ThreeVector& p, const G4ThreeVector& v,
0077                                G4double* s1, G4double* s2 );
0078     G4int LineHitsCone2( const G4ThreeVector& p, const G4ThreeVector& v,
0079                                G4double* s1, G4double* s2 );
0080 };
0081
0082 #endif