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// $Id: G4DNASmoluchowskiReactionModel.hh 65695 2012-11-27 11:39:12Z gunter $
//
// Author: Mathieu Karamitros (kara (AT) cenbg . in2p3 . fr) 
//
// WARNING : This class is released as a prototype.
// It might strongly evolve or even disapear in the next releases.
//
// History:
// -----------
// 10 Oct 2011 M.Karamitros created
//
// -------------------------------------------------------------------

#ifndef G4DiffControlledReactionRadius_
#define G4DiffControlledReactionRadius_

#include "AddClone_def.hh"
#include "G4VDNAReactionModel.hh"
#include <vector>

class G4DNAMolecularReactionData;

/**
  * G4DNASmoluchowskiReactionModel should be used
  * for very fast reactions (high reaction rate) : the reactions between
  * reactants occuring at encounter.
  * When the time step is constrained this model
  * uses brownian bridge : "Absorbing (Smoluchowski) boundary condition"
  * Reference : On the simulation of diffusion processes close to boundaries,
  * N. J. B. Green, Molecular Physics, 65: 6, 1399 — 1408(1988)
  */

class G4DNASmoluchowskiReactionModel : public G4VDNAReactionModel
{
public :
    G4DNASmoluchowskiReactionModel();
    virtual ~G4DNASmoluchowskiReactionModel();

    G4DNASmoluchowskiReactionModel(const G4DNASmoluchowskiReactionModel&);

    G4IT_ADD_CLONE(G4VDNAReactionModel, G4DNASmoluchowskiReactionModel)

    virtual void Initialise(const G4Molecule*, const G4Track&) ;
    virtual void InitialiseToPrint(const G4Molecule*) ;
    virtual G4double GetReactionRadius(const G4Molecule*, const G4Molecule*);
    virtual G4double GetReactionRadius(const G4int);

    virtual G4bool FindReaction(const G4Track&,
                                const G4Track&,
                                const G4double /*reactionRadius*/,
                                G4double& /*separationDistance*/,
                                const G4bool /*alongStepInteraction*/) ;

private :
    const std::vector<const G4DNAMolecularReactionData*>* fReactionData ;
    G4DNASmoluchowskiReactionModel& operator=(const G4DNASmoluchowskiReactionModel&);
};

#endif