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// G4VPVParameterisation
//
// Class description:
//
// Parameterisation abstract base class, able to compute the transformation
// and (indirectly) the dimensions of parameterised volumes, given a
// replication number.

// Author: Paul Kent (CERN), 25.07.1996, P.Kent - Initial stub version
// --------------------------------------------------------------------
#ifndef G4VPVPARAMETERISATION_HH
#define G4VPVPARAMETERISATION_HH

#include "G4Types.hh"
#include "G4VVolumeMaterialScanner.hh"
#include "G4VTouchable.hh"

class G4VPhysicalVolume;
class G4VSolid;
class G4Material;

// Entities which may be parameterised/replicated
//
class G4Box;
class G4Tubs;
class G4Trd;
class G4Trap;
class G4Cons;
class G4Sphere;
class G4Orb;
class G4Ellipsoid;
class G4Torus;
class G4Para;
class G4Polycone;
class G4Polyhedra;
class G4Hype;

class G4VVolumeMaterialScanner; 

/**
 * @brief G4VPVParameterisation ia an abstract base class for Parameterisation,
 * able to compute the transformation and (indirectly) the dimensions of
 * parameterised volumes, given a replication number.
 */

class G4VPVParameterisation
{
  public:

    /**
     * Default Constructor & Destructor.
     */
    G4VPVParameterisation() = default;
    virtual ~G4VPVParameterisation() = default;

    /**
     * Computes the transformation for the 'pv' volume and replica number 'no'.
     * It is a required method, as it is the reason for this class.
     *  @param[in] pv Pointer to the current physical volume.
     *  @param[in] no The copy number index.
     */
    virtual void ComputeTransformation(const G4int no,
                                       G4VPhysicalVolume* pv) const = 0;

    /**
     * Computes the solid for the 'pv' volume and replica number 'no'.
     * To be optionally defined in derived classes, for parameterisation of
     * the solid type.
     *  @param[in] no The copy number index.
     *  @param[in] pv Pointer to the current physical volume.
     */
    virtual G4VSolid* ComputeSolid(const G4int no, G4VPhysicalVolume* pv);
				       
    /**
     * Computes the material for the 'currentVol' and replica number 'repNo'.
     * Must cope with 'parentTouch' for navigator's SetupHierarchy() when
     * used for nested parameterisations.
     *  @param[in] currentVol Pointer to the current physical volume.
     *  @param[in] repNo The copy number index.
     *  @param[in] parentTouch Pointer to the touchable of the parent volume.
     *  @returns A pointer to the associated material.
     */
    virtual G4Material* ComputeMaterial(const G4int repNo, 
                                    G4VPhysicalVolume* currentVol,
                                    const G4VTouchable* parentTouch = nullptr);

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

    /**
     * Dispatch methods for the specific solids where parameterisation
     * is allowed.
     */
    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(G4Ellipsoid &,
                                   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 {}
};

#endif