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// $Id: G4VNestedParameterisation.hh,v 1.6 2006/06/29 18:32:29 gunter Exp $
// GEANT4 tag $Name: geant4-09-03 $
//
// class G4VNestedParameterisation
//
// Class description:
//
// Base class for parameterisations that use information from the parent
// volume to compute the material of a copy/instance of this volume. 
// This is in addition to using the current replication number.
// 
// Notes:
//  - Such a volume can be nested inside a placement volume or a parameterised  
//    volume.
//  - The user can modify the solid type, size or transformation using only
//    the replication number of this parameterised volume.
//    He/she is NOT allowed to change these attributes using information of
//    parent volumes - otherwise incorrect results will occur.
//  Also note that the usual restrictions apply: 
//   - the mother volume, in which these copies are placed, must always be
//     of the same dimensions

// History:
// 24.02.05 - J.Apostolakis - First created version.
// --------------------------------------------------------------------
#ifndef G4VNESTEDPARAMETERISATION_HH
#define G4VNESTEDPARAMETERISATION_HH

#include "G4Types.hh"
#include "G4VPVParameterisation.hh" 
#include "G4VVolumeMaterialScanner.hh"

class G4VPhysicalVolume;
class G4VTouchable; 
class G4VSolid;
class G4Material;

// CSG Entities which may be parameterised/replicated
//
class G4Box;
class G4Tubs;
class G4Trd;
class G4Trap;
class G4Cons;
class G4Sphere;
class G4Orb;
class G4Torus;
class G4Para;
class G4Polycone;
class G4Polyhedra;
class G4Hype;

class G4VNestedParameterisation: public G4VPVParameterisation, 
                                 public G4VVolumeMaterialScanner
{
  public:  // with description

    G4VNestedParameterisation(); 
    virtual ~G4VNestedParameterisation(); 

    // Methods required in derived classes
    // -----------------------------------

    virtual G4Material* ComputeMaterial(G4VPhysicalVolume* currentVol,
                                        const G4int repNo, 
                                        const G4VTouchable* parentTouch=0) = 0;
      // Required method, as it is the reason for this class.
      // Must cope with parentTouch=0 for navigator's SetupHierarchy.

    virtual G4int       GetNumberOfMaterials() const=0;
    virtual G4Material* GetMaterial(G4int idx) const=0;
      // Needed to define materials for instances of Nested Parameterisation 
      // Current convention: each call should return the materials 
      // of all instances with the same mother/ancestor volume.

    virtual void ComputeTransformation(const G4int no,
                                       G4VPhysicalVolume* currentPV) const = 0;

    // Methods optional in derived classes
    // -----------------------------------

    virtual G4VSolid* ComputeSolid(const G4int no, G4VPhysicalVolume *thisVol);
      // Additional standard parameterisation methods, 
      // which can be optionally defined, in case solid is used.

    virtual void ComputeDimensions(G4Box &,
                                   const G4int,
                                   const G4VPhysicalVolume *) const {}

    virtual void ComputeDimensions(G4Tubs &,
                                   const G4int,
                                   const G4VPhysicalVolume *) const {}

    virtual void ComputeDimensions(G4Trd &,
                                   const G4int,
                                   const G4VPhysicalVolume *) const {}

    virtual void ComputeDimensions(G4Trap &,
                                   const G4int,
                                   const G4VPhysicalVolume *) const {}

    virtual void ComputeDimensions(G4Cons &,
                                   const G4int,
                                   const G4VPhysicalVolume *) const {}

    virtual void ComputeDimensions(G4Sphere &,
                                   const G4int,
                                   const G4VPhysicalVolume *) const {}

    virtual void ComputeDimensions(G4Orb &,
                                   const G4int,
                                   const G4VPhysicalVolume *) const {}

    virtual void ComputeDimensions(G4Torus &,
                                   const G4int,
                                   const G4VPhysicalVolume *) const {}

    virtual void ComputeDimensions(G4Para &,
                                   const G4int,
                                   const G4VPhysicalVolume *) const {}

    virtual void ComputeDimensions(G4Polycone &,
                                   const G4int,
                                   const G4VPhysicalVolume *) const {}

    virtual void ComputeDimensions(G4Polyhedra &,
                                   const G4int,
                                   const G4VPhysicalVolume *) const {}

    virtual void ComputeDimensions(G4Hype &,
                                   const G4int,
                                   const G4VPhysicalVolume *) const {}
 

    G4Material* ComputeMaterial(const G4int repNo, 
                                      G4VPhysicalVolume *currentVol,
                                const G4VTouchable *parentTouch=0);
      // Method implemented in this class in terms of the above
      // ComputeMaterial() method.

    virtual G4bool IsNested() const;
    virtual G4VVolumeMaterialScanner* GetMaterialScanner(); 
      // Methods to identify nested parameterisations. Required in order
      // to enable material scan for nested parameterisations.
};

#endif