G4IntersectingCone.hh

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00026 //
00027 // $Id: G4IntersectingCone.hh 67011 2013-01-29 16:17:41Z gcosmo $
00028 //
00029 // 
00030 // --------------------------------------------------------------------
00031 // GEANT 4 class header file
00032 //
00033 //
00034 // G4IntersectingCone
00035 //
00036 // Class description:
00037 //
00038 //   Utility class which calculates the intersection
00039 //   of an arbitrary line with a fixed cone
00040 
00041 // Author: 
00042 //   David C. Williams (davidw@scipp.ucsc.edu)
00043 // --------------------------------------------------------------------
00044 #ifndef G4IntersectingCone_hh
00045 #define G4IntersectingCone_hh
00046 
00047 #include "G4Types.hh"
00048 #include "geomdefs.hh"
00049 #include "G4ThreeVector.hh"
00050 
00051 class G4IntersectingCone
00052 {
00053   public:
00054 
00055     G4IntersectingCone( const G4double r[2], const G4double z[2] );
00056     virtual ~G4IntersectingCone();
00057   
00058     G4int LineHitsCone( const G4ThreeVector &p, const G4ThreeVector &v,
00059                               G4double *s1, G4double *s2 );
00060   
00061     G4bool HitOn( const G4double r, const G4double z );
00062   
00063     inline G4double RLo() const { return rLo; }
00064     inline G4double RHi() const { return rHi; }
00065     inline G4double ZLo() const { return zLo; }
00066     inline G4double ZHi() const { return zHi; }
00067   
00068   public:  // without description
00069 
00070     G4IntersectingCone(__void__&);
00071       // Fake default constructor for usage restricted to direct object
00072       // persistency for clients requiring preallocation of memory for
00073       // persistifiable objects.
00074 
00075 
00076   protected:
00077 
00078     G4double zLo, zHi,  // Z bounds of side
00079              rLo, rHi;  // R bounds of side
00080 
00081     G4bool   type1;    // True if cone is type 1
00082                        //  (std::fabs(z1-z2)>std::fabs(r1-r2))
00083     G4double A, B;     // Cone radius parameter:
00084                        //  type 1: r = A + B*z
00085                        //  type 2: z = A + B*r
00086 
00087     G4int LineHitsCone1( const G4ThreeVector &p, const G4ThreeVector &v,
00088                                G4double *s1, G4double *s2 );
00089     G4int LineHitsCone2( const G4ThreeVector &p, const G4ThreeVector &v,
00090                                G4double *s1, G4double *s2 );
00091 };
00092 
00093 #endif

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