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// $Id: G4PVDivision.hh,v 1.14 2008/12/03 16:41:45 arce Exp $
// GEANT4 tag $Name: geant4-09-03 $
// 
// class G4PVDivision
//
// Class description:
//
// Represents many touchable detector elements differing only in their
// positioning. The elements' positions are calculated by means of a simple
// linear formula.
// 
// G4PVDivision(const G4String& pName,
//                    G4LogicalVolume* pLogical,
//                    G4LogicalVolume* pMother,
//              const EAxis pAxis,
//              const G4int nReplicas,
//              const G4double width,
//              const G4double offset=0)
//
// Division may occur along:
//
// o Cartesian axes (kXAxis,kYAxis,kZAxis)
//
//   The divisions, of specified width have coordinates of
//   form (-width*(nReplicas-1)*0.5+n*width,0,0) where n=0.. nReplicas-1
//   for the case of kXAxis, and are unrotated.
//
// o Radial axis (cylindrical polar) (kRho)
//
//   The divisions are cons/tubs sections, centred on the origin
//   and are unrotated.
//   They have radii of width*n+offset to width*(n+1)+offset
//                      where n=0..nReplicas-1
//
// o Phi axis (cylindrical polar) (kPhi)
//   The divisions are `phi sections' or wedges, and of cons/tubs form
//   They have phi of offset+n*width to offset+(n+1)*width where
//   n=0..nReplicas-1

// History:
// -------
// 09.05.01 - P.Arce, Initial version
// ----------------------------------------------------------------------
#ifndef G4PVDIVISION_HH
#define G4PVDIVISION_HH

#include "geomdefs.hh"
#include "G4VPhysicalVolume.hh"
#include "G4VDivisionParameterisation.hh"

class G4LogicalVolume;
class G4VSolid;

class G4PVDivision : public G4VPhysicalVolume
{
  public:  // with description
    
    G4PVDivision(const G4String& pName,
                       G4LogicalVolume* pLogical,
                       G4LogicalVolume* pMother,
                 const EAxis pAxis,
                 const G4int nReplicas,
                 const G4double width,
                 const G4double offset );
      // Constructor with number of divisions and width

    G4PVDivision(const G4String& pName,
                       G4LogicalVolume* pLogical,
                       G4LogicalVolume* pMotherLogical,
                 const EAxis pAxis,
                 const G4int nReplicas,
                 const G4double offset );
      // Constructor with number of divisions 

    G4PVDivision(const G4String& pName,
                       G4LogicalVolume* pLogical,
                       G4LogicalVolume* pMotherLogical,
                 const EAxis pAxis,
                 const G4double width,
                 const G4double offset );
      // Constructor with width

  public:  // without description

    G4PVDivision(const G4String& pName,
                       G4LogicalVolume* pLogical,
                       G4VPhysicalVolume* pMother,
                 const EAxis pAxis,
                 const G4int nReplicas,
                 const G4double width,
                 const G4double offset);
      // Constructor in mother physical volume

  public:  // with description

    virtual ~G4PVDivision();

    virtual G4bool IsMany() const;
    virtual G4int GetCopyNo() const;
    virtual void  SetCopyNo(G4int CopyNo);
    virtual G4bool IsReplicated() const;
    virtual G4VPVParameterisation* GetParameterisation() const;
    virtual void GetReplicationData( EAxis& axis,
                                     G4int& nReplicas,
                                     G4double& width,
                                     G4double& offset,
                                     G4bool& consuming ) const;
    EAxis  GetDivisionAxis() const;
    G4bool IsParameterised() const;

  public:  // without description

    G4bool IsRegularStructure() const; 
    G4int  GetRegularStructureId() const; 
      // Methods to identify volume that can have revised 'regular' navigation.
      // Currently divisions do not qualify for this.

  private:

    void CheckAndSetParameters( const EAxis pAxis,
                                const G4int nDivs,
                                const G4double width,
                                const G4double offset, 
                                      DivisionType divType,
                                const G4LogicalVolume* pMotherLogical );

    G4PVDivision(const G4PVDivision&);
    const G4PVDivision& operator=(const G4PVDivision&);

    void SetParameterisation( G4LogicalVolume* motherLogical,
                        const EAxis pAxis,
                        const G4int nReplicas,
                        const G4double width,
                        const G4double offset, 
                              DivisionType divType );
    void ErrorInAxis( EAxis axis, G4VSolid* solid );

  protected:

    EAxis faxis;             // axis of optimisation
    EAxis fdivAxis;          // axis of division
    G4int fnReplicas;
    G4double fwidth,foffset;
    G4int    fcopyNo;
    G4VDivisionParameterisation *fparam; 
};

#endif
