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// ********************************************************************
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//
// $Id: G4EllipticalTube.hh,v 1.10 2002/10/28 11:47:49 gcosmo Exp $
// GEANT4 tag $Name: geant4-05-00 $
//
// --------------------------------------------------------------------
// GEANT 4 class header file
//
// G4EllipticalTube
//
// Class description:
//
//   Declaration of a CSG volume representing a tube with elliptical
//   cross section (geant3 solid 'ELTU'):
//   
//   G4EllipticalTube( const G4String& name, 
//                           G4double  Dx,
//                           G4double  Dy,
//                           G4double  Dz )
//
//   The equation of the surface in x/y is 1.0 = (x/dx)**2 + (y/dy)**2

// Author: 
//   David C. Williams (davidw@scipp.ucsc.edu)
// --------------------------------------------------------------------

#ifndef G4EllipticalTube_hh
#define G4EllipticalTube_hh

#include "G4VSolid.hh"

class G4EllipticalTube : public G4VSolid
{
  public:  // with description

  G4EllipticalTube( const G4String &name, 
                          G4double theDx,
                          G4double theDy,
                          G4double theDz );

  virtual ~G4EllipticalTube();
      
  // Standard solid methods

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

  virtual G4ThreeVector SurfaceNormal( const G4ThreeVector& p ) const;

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

  G4GeometryType GetEntityType() const;

  G4std::ostream& StreamInfo(G4std::ostream& os) const;

  // Visualisation methods

  virtual G4Polyhedron* CreatePolyhedron() const;
  virtual void DescribeYourselfTo( G4VGraphicsScene& scene ) const;
  virtual G4VisExtent GetExtent() const;

  // Accessors

  inline G4double GetDx() const;
  inline G4double GetDy() const;
  inline G4double GetDz() const;
  
  inline void SetDx( const G4double newDx );
  inline void SetDy( const G4double newDy );
  inline void SetDz( const G4double newDz );
  
  protected:  // without description

  G4double dx, dy, dz;
  
  // Utility

  inline G4double CheckXY( const G4double x,
                           const G4double y,
                           const G4double toler ) const;
  inline G4double CheckXY( const G4double x, const G4double y ) const;

  G4int IntersectXY( const G4ThreeVector &p,
                     const G4ThreeVector &v, G4double s[2] ) const;
};

#include "G4EllipticalTube.icc"

#endif