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// $Id: G4Orb.hh,v 1.11 2006/10/19 15:33:37 gcosmo Exp $
// GEANT4 tag $Name: geant4-09-03 $
//
//
// --------------------------------------------------------------------
// GEANT 4 class header file
//
// G4Orb
//
// Class description:
//
//   A G4Orb is a simple case of G4Sphere. It has only:
//   fRmax  outer radius

//  History:
// 20.08.03 V.Grichine - created
// --------------------------------------------------------------------

#ifndef G4Orb_HH
#define G4Orb_HH

#include "G4CSGSolid.hh"

class G4Orb : public G4CSGSolid
{
  public:  // with description

    G4Orb(const G4String& pName, G4double pRmax);
       
    virtual ~G4Orb() ;
    
    // Accessors
       
    inline G4double GetRadius() const;

    // Modifiers

    inline void SetRadius(G4double newRmax);

    // Methods for solid

    inline G4double GetCubicVolume();
    inline G4double GetSurfaceArea();

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

    G4bool CalculateExtent(const EAxis pAxis,
                           const G4VoxelLimits& pVoxelLimit,
                           const G4AffineTransform& pTransform,
                                 G4double& pmin, G4double& pmax) const;
         
    EInside Inside(const G4ThreeVector& p) const;

    G4ThreeVector SurfaceNormal( const G4ThreeVector& p) const;

    G4double DistanceToIn(const G4ThreeVector& p,
                          const G4ThreeVector& v) const;
    
    G4double DistanceToIn(const G4ThreeVector& p) const;
    
    G4double DistanceToOut(const G4ThreeVector& p,
                           const G4ThreeVector& v,
                           const G4bool calcNorm=G4bool(false),
                                 G4bool *validNorm=0,
                                 G4ThreeVector *n=0) const;
         
    G4double DistanceToOut(const G4ThreeVector& p) const;

    G4GeometryType GetEntityType() const;
 
    G4ThreeVector GetPointOnSurface() const;

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

    // Visualisation functions
  
    void          DescribeYourselfTo(G4VGraphicsScene& scene) const;
    G4Polyhedron* CreatePolyhedron() const;
    G4NURBS*      CreateNURBS() const;

  public:  // without description

    G4Orb(__void__&);
      // Fake default constructor for usage restricted to direct object
      // persistency for clients requiring preallocation of memory for
      // persistifiable objects.

  protected:
  
    // Used by distanceToOut
  
    enum ESide {kNull,kRMax};
  
    // used by normal
  
    enum ENorm {kNRMax};

  private:

    static const G4double fEpsilon;
    G4double fRmax;
    G4double fRmaxTolerance;
};

#include "G4Orb.icc"

#endif
