//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
//
// $Id: G4Paraboloid.hh,v 1.4 2008/01/22 17:42:09 tnikitin Exp $
// GEANT4 tag $Name: geant4-09-03 $
//
//
// --------------------------------------------------------------------
// GEANT 4 class header file
//
// G4Paraboloid
//
// Class description:
//
//   A G4Paraboloid represents a solid with parabolic profile with possible
//   cuts along the Z axis.
//
//   Member Data:
//
//      dz              z half lenght
//      r1              radius at -dz
//      r2              radius at  dz
//      r2  > r1
//
//      Equation for the solid:
//        rho^2 <= k1 * z + k2;
//        -dz <= z <= dz
//        r1^2 = k1 * (-dz) + k2
//        r2^2 = k1 * ( dz) + k2

// History:
// -------
// 10.07.2007  L.Lindroos (CERN) - First implementation
// --------------------------------------------------------------------
#ifndef G4Paraboloid_HH
#define G4Paraboloid_HH

#include "G4VSolid.hh"

class G4Paraboloid : public G4VSolid
{
  public:  // with description

    G4Paraboloid(const G4String& pName,
		      G4double  pDz,
                      G4double  pR1,
                      G4double  pR2);

    virtual ~G4Paraboloid();

    // Access functions

    inline G4double GetZHalfLength() const;
    inline G4double GetRadiusMinusZ() const;
    inline G4double GetRadiusPlusZ() const;

    inline G4double GetCubicVolume();
    inline G4double GetSurfaceArea();
    inline G4double CalculateSurfaceArea() const;

    // Modifiers functions

    inline void SetZHalfLength(G4double dz);
    inline void SetRadiusMinusZ(G4double R1);
    inline void SetRadiusPlusZ(G4double R2);

    // Solid standard methods

    //void ComputeDimensions(       G4VPVParamerisation 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;

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

    G4ThreeVector GetPointOnSurface() const;

    // Visualisation functions

    void DescribeYourselfTo(G4VGraphicsScene& scene) const;
    G4Polyhedron* CreatePolyhedron() const;
    G4Polyhedron* GetPolyhedron () const;
    G4NURBS*      CreateNURBS() const;

  public:  // without description

    G4Paraboloid(__void__&);
      // Fake default constructor for usage restricted to direct object
      // persistency for clients requiring preallocation of memory for
      // persistifiable objects.

  protected:  // without description
 
    mutable G4Polyhedron* fpPolyhedron;

  private:

    G4ThreeVectorList*
      CreateRotatedVertices(const G4AffineTransform& pTransform,
                                         G4int& noPolygonVertices) const;
    // Making this mutable to allow GetPointOnSurface to have access to
    // area function.
    mutable G4double fSurfaceArea;
    G4double fCubicVolume;

    G4double dz, r1, r2;
    G4double k1, k2; 
    // Defined to make some calculations easier to follow
};

#include "G4Paraboloid.icc"

#endif
