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// $Id$
//
// 
// --------------------------------------------------------------------
// GEANT 4 class header file
//
//
// G4Polycone
//
// Class description:
//
//   Class implementing a CSG-like type "PCON" Geant 3.21 volume,
//   inherited from  class G4VCSGfaceted:
//
//   G4Polycone( const G4String& name, 
//               G4double phiStart,     // initial phi starting angle
//               G4double phiTotal,     // total phi angle
//               G4int numZPlanes,      // number of z planes
//               const G4double zPlane[],  // position of z planes
//               const G4double rInner[],  // tangent distance to inner surface
//               const G4double rOuter[])  // tangent distance to outer surface
//
//   Alternative constructor, but limited to increasing-only Z sections:
//
//   G4Polycone( const G4String& name, 
//               G4double phiStart,   // initial phi starting angle
//               G4double phiTotal,   // total phi angle
//               G4int    numRZ,      // number corners in r,z space
//               const G4double r[],  // r coordinate of these corners
//               const G4double z[])  // z coordinate of these corners

// Author: 
//   David C. Williams (davidw@scipp.ucsc.edu)
// --------------------------------------------------------------------
#ifndef G4Polycone_hh
#define G4Polycone_hh

#if defined(G4GEOM_USE_USOLIDS)
#define G4GEOM_USE_UPOLYCONE 1
#endif

#if defined(G4GEOM_USE_UPOLYCONE)
  #define G4UPolycone G4Polycone
  #include "G4UPolycone.hh"
#else

#include "G4VCSGfaceted.hh"
#include "G4PolyconeSide.hh"
#include "G4PolyconeHistorical.hh"
#include "G4Polyhedron.hh"

class G4EnclosingCylinder;
class G4ReduciblePolygon;
class G4VCSGface;

class G4Polycone : public G4VCSGfaceted 
{

 public:  // with description

  G4Polycone( const G4String& name, 
                    G4double phiStart,     // initial phi starting angle
                    G4double phiTotal,     // total phi angle
                    G4int numZPlanes,      // number of z planes
              const G4double zPlane[],     // position of z planes
              const G4double rInner[],     // tangent distance to inner surface
              const G4double rOuter[]  );  // tangent distance to outer surface

  G4Polycone( const G4String& name, 
                    G4double phiStart,    // initial phi starting angle
                    G4double phiTotal,    // total phi angle
                    G4int    numRZ,       // number corners in r,z space
              const G4double r[],         // r coordinate of these corners
              const G4double z[]       ); // z coordinate of these corners

  virtual ~G4Polycone();
  
  // Methods for solid

  EInside Inside( const G4ThreeVector &p ) const;
  G4double DistanceToIn( const G4ThreeVector &p, const G4ThreeVector &v ) const;
  G4double DistanceToIn( const G4ThreeVector &p ) const;

  void BoundingLimits(G4ThreeVector& pMin, G4ThreeVector& pMax) const;
  G4bool CalculateExtent(const EAxis pAxis,
                         const G4VoxelLimits& pVoxelLimit,
                         const G4AffineTransform& pTransform,
                         G4double& pmin, G4double& pmax) const;

  G4ThreeVector GetPointOnSurface() const;

  void ComputeDimensions(       G4VPVParameterisation* p,
                          const G4int n,
                          const G4VPhysicalVolume* pRep );

  G4GeometryType GetEntityType() const;

  G4VSolid* Clone() const;

  std::ostream& StreamInfo(std::ostream& os) const;

  G4Polyhedron* CreatePolyhedron() const;

  G4bool Reset();

  // Accessors

  inline G4double GetStartPhi()    const;
  inline G4double GetEndPhi()      const;
  inline G4double GetSinStartPhi() const;
  inline G4double GetCosStartPhi() const;
  inline G4double GetSinEndPhi()   const;
  inline G4double GetCosEndPhi()   const;
  inline G4bool IsOpen()           const;
  inline G4int  GetNumRZCorner()   const;
  inline G4PolyconeSideRZ GetCorner(G4int index) const;
  inline G4PolyconeHistorical* GetOriginalParameters() const;
  inline void SetOriginalParameters(G4PolyconeHistorical* pars);

 public:  // without description

  G4Polycone(__void__&);
    // Fake default constructor for usage restricted to direct object
    // persistency for clients requiring preallocation of memory for
    // persistifiable objects.

  G4Polycone( const G4Polycone &source );
  G4Polycone &operator=( const G4Polycone &source );
    // Copy constructor and assignment operator.

 protected:  // without description

  // Generic initializer, called by all constructors

  G4bool SetOriginalParameters(G4ReduciblePolygon *rz);

  void Create( G4double phiStart,        // initial phi starting angle
               G4double phiTotal,        // total phi angle
               G4ReduciblePolygon *rz ); // r/z coordinate of these corners

  void CopyStuff( const G4Polycone &source );

  // Methods for random point generation

  G4ThreeVector GetPointOnCone(G4double fRmin1, G4double fRmax1,
                               G4double fRmin2, G4double fRmax2,
                               G4double zOne,   G4double zTwo,
                               G4double& totArea) const;
  
  G4ThreeVector GetPointOnTubs(G4double fRMin, G4double fRMax,
                               G4double zOne,  G4double zTwo,
                               G4double& totArea) const;
  
  G4ThreeVector GetPointOnCut(G4double fRMin1, G4double fRMax1,
                              G4double fRMin2, G4double fRMax2,
                              G4double zOne,   G4double zTwo,
                              G4double& totArea) const;

  G4ThreeVector GetPointOnRing(G4double fRMin, G4double fRMax,
                               G4double fRMin2, G4double fRMax2,
                               G4double zOne) const;

 protected:  // without description

  // Here are our parameters

  G4double startPhi;    // Starting phi value (0 < phiStart < 2pi)
  G4double endPhi;      // end phi value (0 < endPhi-phiStart < 2pi)
  G4bool   phiIsOpen;   // true if there is a phi segment
  G4int    numCorner;   // number RZ points
  G4PolyconeSideRZ *corners;  // corner r,z points
  G4PolyconeHistorical  *original_parameters;  // original input parameters

  // Our quick test

  G4EnclosingCylinder *enclosingCylinder;
  
};

#include "G4Polycone.icc"

#endif

#endif
