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//
// $Id: G4Box.hh,v 1.6.2.1 2001/06/28 19:08:59 gunter Exp $
// GEANT4 tag $Name:  $
//
// --------------------------------------------------------------------
// GEANT 4 class header file
//
// 
// G4Box
//
// Class description:
//
//   A Box is a cuboid of given half lengths dx,dy,dz. The Box is
//   centred on the origin with sides parallel to the x/y/z axes.
//
//   Member functions:
//
//   As inherited from G4CSGSolid +
//
//     G4Box(const G4String& pName,
//                 G4double pX, G4double pY, G4double pZ)
//
//     - Construct a box with name, and half lengths pX,pY,pZ
//
//     G4double GetXHalfLength() const
//     G4double GetYHalfLength() const
//     G4double GetZHalfLength() const
//
//     - Return the respective parameter
//
//   Protected:
// 
//     G4ThreeVectorList*
//     CreateRotatedVertices(const G4AffineTransform& pTransform) const
// 
//     - Create the List of transformed vertices in the format required
//       for G4VSolid:: ClipCrossSection and ClipBetweenSections.
//
//   Member Data: (private)
//
//     fDx,fDy,fDz - The box's half-widths

// History:
// 30.06.95 P.Kent Converted from source code developed end 94
// 27.03.96 J.Allison Added virtual functions DescribeYourselfTo and
//                    SendWireframeTo (G4VGraphicsModel&).
// 22.07.96 J.Allison Changed G4VGraphicsModel to G4VGraphicsScene.
//                     and    SendPolyhedronTo to CreatePolyhedron.
// 27.03.98 J.Apostolakis Inherit from G4CSGSolid (not G4VSolid).
// 18.11.99  J.Apostolakis, V.Grichine: kUndefined was added to ESide
// --------------------------------------------------------------------

#ifndef G4BOX_HH
#define G4BOX_HH

#include "G4CSGSolid.hh"

class G4Box : public G4CSGSolid 
{
  public:

    G4Box(const G4String& pName, G4double pX, G4double pY, G4double pZ);

    virtual ~G4Box();

    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;
  // Access functions

    G4double GetXHalfLength() const { return fDx; }
    
    G4double GetYHalfLength() const { return fDy; }
    
    G4double GetZHalfLength() const { return fDz; }

    void SetXHalfLength(G4double dx) ;

    void SetYHalfLength(G4double dy) ;

    void SetZHalfLength(G4double dz) ;
    
    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=false,
			   G4bool *validNorm=0,G4ThreeVector *n=0) const;

    G4double DistanceToOut(const G4ThreeVector& p) const;

    G4GeometryType  GetEntityType() const { return G4String("G4Box"); }

    void          DescribeYourselfTo (G4VGraphicsScene& scene) const;
    G4VisExtent   GetExtent          () const;
    G4Polyhedron* CreatePolyhedron   () const;
    G4NURBS*      CreateNURBS        () const;

  protected:

    G4ThreeVectorList*
    CreateRotatedVertices(const G4AffineTransform& pTransform) const;
    
  // Codes for faces (kPX=plus x face,kMY= minus y face etc)

    enum ESide {kUndefined,kPX,kMX,kPY,kMY,kPZ,kMZ};

  private:

    G4double fDx,fDy,fDz;
};

#endif