G4Cons.hh

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//
// G4Cons
//
// Class description:
//
//   A G4Cons is, in the general case, a Phi segment of a cone, with
//   half-length fDz, inner and outer radii specified at -fDz and +fDz.
//   The Phi segment is described by a starting fSPhi angle, and the
//   +fDPhi delta angle for the shape.
//   If the delta angle is >=2*pi, the shape is treated as continuous
//   in Phi
//
//   Member Data:
//
//  fRmin1  inside radius at  -fDz
//  fRmin2  inside radius at  +fDz
//  fRmax1  outside radius at -fDz
//  fRmax2  outside radius at +fDz
//  fDz  half length in z
//
//  fSPhi  starting angle of the segment in radians
//  fDPhi  delta angle of the segment in radians
//
//  fPhiFullCone   Boolean variable used for indicate the Phi Section
//
//   Note:
//      Internally fSPhi & fDPhi are adjusted so that fDPhi<=2PI,
//      and fDPhi+fSPhi<=2PI. This enables simpler comparisons to be
//      made with (say) Phi of a point.
 
// 19.3.94 P.Kent: Old C++ code converted to tolerant geometry
// 13.9.96 V.Grichine: Final modifications to commit
// --------------------------------------------------------------------
#ifndef G4CONS_HH
#define G4CONS_HH
 
#include "G4GeomTypes.hh"
 
#if defined(G4GEOM_USE_USOLIDS)
#define G4GEOM_USE_UCONS 1
#endif
 
#if defined(G4GEOM_USE_UCONS)
  #define G4UCons G4Cons
  #include "G4UCons.hh"
#else
 
#include <CLHEP/Units/PhysicalConstants.h>
 
#include "G4CSGSolid.hh"
#include "G4Polyhedron.hh"
 
class G4Cons : public G4CSGSolid
{
  public:
 
    G4Cons(const G4String& pName,
                 G4double pRmin1, G4double pRmax1,
                 G4double pRmin2, G4double pRmax2,
                 G4double pDz,
                 G4double pSPhi, G4double pDPhi);
      //
      // Constructs a cone with the given name and dimensions
 
   ~G4Cons() override ;
      //
      // Destructor
 
    // Accessors
 
    inline G4double GetInnerRadiusMinusZ() const;
    inline G4double GetOuterRadiusMinusZ() const;
    inline G4double GetInnerRadiusPlusZ()  const;
    inline G4double GetOuterRadiusPlusZ()  const;
    inline G4double GetZHalfLength()       const;
    inline G4double GetStartPhiAngle()     const;
    inline G4double GetDeltaPhiAngle()     const;
    inline G4double GetSinStartPhi()       const;
    inline G4double GetCosStartPhi()       const;
    inline G4double GetSinEndPhi()         const;
    inline G4double GetCosEndPhi()         const;
 
    // Modifiers
 
    inline void SetInnerRadiusMinusZ (G4double Rmin1 );
    inline void SetOuterRadiusMinusZ (G4double Rmax1 );
    inline void SetInnerRadiusPlusZ  (G4double Rmin2 );
    inline void SetOuterRadiusPlusZ  (G4double Rmax2 );
    inline void SetZHalfLength       (G4double newDz );
    inline void SetStartPhiAngle     (G4double newSPhi, G4bool trig=true);
    inline void SetDeltaPhiAngle     (G4double newDPhi);
 
    // Other methods for solid
 
    inline G4double GetCubicVolume() override;
    inline G4double GetSurfaceArea() override;
 
    void ComputeDimensions(      G4VPVParameterisation* p,
                           const G4int n,
                           const G4VPhysicalVolume* pRep) override;
 
    void BoundingLimits(G4ThreeVector& pMin, G4ThreeVector& pMax) const override;
 
    G4bool CalculateExtent(const EAxis pAxis,
                           const G4VoxelLimits& pVoxelLimit,
                           const G4AffineTransform& pTransform,
                                 G4double& pMin, G4double& pMax) const override;
 
    EInside Inside( const G4ThreeVector& p ) const override;
 
    G4ThreeVector SurfaceNormal( const G4ThreeVector& p ) const override;
 
    G4double DistanceToIn (const G4ThreeVector& p,
                           const G4ThreeVector& v) const override;
    G4double DistanceToIn (const G4ThreeVector& p) const override;
    G4double DistanceToOut(const G4ThreeVector& p,
                           const G4ThreeVector& v,
                           const G4bool calcNorm = false,
                                 G4bool* validNorm = nullptr,
                                 G4ThreeVector* n = nullptr) const override;
    G4double DistanceToOut(const G4ThreeVector& p) const override;
 
    G4GeometryType GetEntityType() const override;
 
    G4ThreeVector GetPointOnSurface() const override;
 
    G4VSolid* Clone() const override;
 
    std::ostream& StreamInfo(std::ostream& os) const override;
 
    // Visualisation functions
 
    void          DescribeYourselfTo( G4VGraphicsScene& scene ) const override;
    G4Polyhedron* CreatePolyhedron() const override;
 
    G4Cons(__void__&);
      //
      // Fake default constructor for usage restricted to direct object
      // persistency for clients requiring preallocation of memory for
      // persistifiable objects.
 
    G4Cons(const G4Cons& rhs);
    G4Cons& operator=(const G4Cons& rhs);
      // Copy constructor and assignment operator.
 
  private:
 
    inline void Initialize();
      //
      // Reset relevant values to zero
 
    inline void CheckSPhiAngle(G4double sPhi);
    inline void CheckDPhiAngle(G4double dPhi);
    inline void CheckPhiAngles(G4double sPhi, G4double dPhi);
      //
      // Reset relevant flags and angle values
 
    inline void InitializeTrigonometry();
      //
      // Recompute relevant trigonometric values and cache them
 
    G4ThreeVector ApproxSurfaceNormal(const G4ThreeVector& p) const;
      //
      // Algorithm for SurfaceNormal() following the original
      // specification for points not on the surface
 
  private:
 
    // Used by distanceToOut
    //
    enum ESide {kNull,kRMin,kRMax,kSPhi,kEPhi,kPZ,kMZ};
 
    // used by normal
    //
    enum ENorm {kNRMin,kNRMax,kNSPhi,kNEPhi,kNZ};
 
    G4double kRadTolerance, kAngTolerance;
      //
      // Radial and angular tolerances
 
    G4double fRmin1, fRmin2, fRmax1, fRmax2, fDz, fSPhi, fDPhi;
      //
      // Radial and angular dimensions
 
    G4double sinCPhi, cosCPhi, cosHDPhi, cosHDPhiOT, cosHDPhiIT,
             sinSPhi, cosSPhi, sinEPhi, cosEPhi;
      //
      // Cached trigonometric values
 
    G4bool fPhiFullCone = false;
      //
      // Flag for identification of section or full cone
 
    G4double halfCarTolerance, halfRadTolerance, halfAngTolerance;
      //
      // Cached half tolerance values
};
 
#include "G4Cons.icc"
 
#endif
 
#endif