HBondJump.hpp

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 * SUPPORT OPEN SCIENCE!  If you use OpenMD or its source code in your
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 * work.  Good starting points are:
 *
 * [1] Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).
 * [2] Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).
 * [3] Sun, Lin & Gezelter, J. Chem. Phys. 128, 234107 (2008).
 * [4] Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011).
 * [5] Kuang & Gezelter, Mol. Phys., 110, 691-701 (2012).
 * [6] Lamichhane, Gezelter & Newman, J. Chem. Phys. 141, 134109 (2014).
 * [7] Lamichhane, Newman & Gezelter, J. Chem. Phys. 141, 134110 (2014).
 * [8] Bhattarai, Newman & Gezelter, Phys. Rev. B 99, 094106 (2019).
 */
 
#ifndef APPLICATIONS_DYNAMICPROPS_HBONDJUMP_HPP
#define APPLICATIONS_DYNAMICPROPS_HBONDJUMP_HPP
 
#include "applications/dynamicProps/TimeCorrFunc.hpp"
 
#define HONKING_LARGE_VALUE 1.0e10
 
namespace OpenMD {
 
  class HBondJump : public TimeCorrFunc<RealType> {
  public:
    HBondJump(SimInfo* info, const std::string& filename,
              const std::string& sele1, const std::string& sele2, double OOCut,
              double thetaCut, double OHCut);
 
  protected:
    virtual void correlation();
    virtual void computeFrame(int istep);
 
    virtual void computeProperty1(int) { return; }
    virtual void computeProperty2(int) { return; }
    virtual int computeProperty1(int, Molecule*) { return -1; }
    virtual int computeProperty1(int, StuntDouble*) { return -1; }
    virtual int computeProperty1(int, Bond*) { return -1; }
    virtual int computeProperty2(int, Molecule*) { return -1; }
    virtual int computeProperty2(int, StuntDouble*) { return -1; }
    virtual int computeProperty2(int, Bond*) { return -1; }
 
    virtual RealType calcCorrVal(int, int, int, int) { return 0.0; }
    virtual RealType calcCorrVal(int, int) { return 0.0; }
 
    virtual void postCorrelate();
 
    virtual int registerHydrogen(int frame, int hIndex);
    virtual void findHBonds(int frame);
    bool isHBond(Vector3d donorPos, Vector3d hPos, Vector3d acceptorPos);
    void registerHydrogenBond(int frame, int index, int hIndex, int aIndex);
    void processNonOverlapping(int frame, SelectionManager& sman1,
                               SelectionManager& sman2);
    void processOverlapping(int frame, SelectionManager& sman);
 
    std::vector<std::vector<int>> GIDtoH_;
    std::vector<std::vector<int>> hydrogen_;
    std::vector<std::vector<int>> acceptor_;
    std::vector<std::vector<int>> lastAcceptor_;
    std::vector<std::vector<bool>> selected_;
    std::vector<std::vector<int>> acceptorStartFrame_;
 
    RealType OOCut_;
    RealType thetaCut_;
    RealType OHCut_;
 
    SelectionManager sele1_minus_common_;
    SelectionManager sele2_minus_common_;
    SelectionManager common_;
  };
 
  class HBondJumpZ : public HBondJump {
  public:
    HBondJumpZ(SimInfo* info, const std::string& filename,
               const std::string& sele1, const std::string& sele2, double OOCut,
               double thetaCut, double OHCut, int nZbins, int axis = 2);
    virtual int registerHydrogen(int frame, int hIndex);
    virtual void findHBonds(int frame);
    virtual void correlation();
    virtual void postCorrelate();
    virtual void writeCorrelate();
 
  private:
    std::vector<std::vector<RealType>> histogram_;
    std::vector<std::vector<int>> counts_;
    std::vector<std::vector<int>> zbin_;
    unsigned int nZBins_;
    int axis_;
    std::string axisLabel_;
  };
 
  class HBondJumpR : public HBondJump {
  public:
    HBondJumpR(SimInfo* info, const std::string& filename,
               const std::string& sele1, const std::string& sele2,
               const std::string& sele3, double OOCut, RealType thetaCut,
               RealType OHCut, RealType len, int nRbins);
    virtual int registerHydrogen(int frame, int hIndex);
    virtual void findHBonds(int frame);
    virtual void correlation();
    virtual void postCorrelate();
    virtual void writeCorrelate();
 
  private:
    RealType len_;
    unsigned int nRBins_;
    RealType deltaR_;
    SelectionManager seleMan3_;
    std::string selectionScript3_;
    SelectionEvaluator evaluator3_;
 
    std::vector<std::vector<RealType>> histogram_;
    std::vector<std::vector<int>> counts_;
    std::vector<std::vector<int>> rbin_;
  };
}  // namespace OpenMD
 
#endif