src/nonbonded/NonBondedInteraction.hpp

/*
 * Copyright (c) 2005 The University of Notre Dame. All Rights Reserved.
 *
 * The University of Notre Dame grants you ("Licensee") a
 * non-exclusive, royalty free, license to use, modify and
 * redistribute this software in source and binary code form, provided
 * that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the
 *    distribution.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. All express or implied conditions, representations and
 * warranties, including any implied warranty of merchantability,
 * fitness for a particular purpose or non-infringement, are hereby
 * excluded.  The University of Notre Dame and its licensors shall not
 * be liable for any damages suffered by licensee as a result of
 * using, modifying or distributing the software or its
 * derivatives. In no event will the University of Notre Dame or its
 * licensors be liable for any lost revenue, profit or data, or for
 * direct, indirect, special, consequential, incidental or punitive
 * damages, however caused and regardless of the theory of liability,
 * arising out of the use of or inability to use software, even if the
 * University of Notre Dame has been advised of the possibility of
 * such damages.
 *
 * SUPPORT OPEN SCIENCE!  If you use OpenMD or its source code in your
 * research, please cite the appropriate papers when you publish your
 * 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]  Kuang & Gezelter,  J. Chem. Phys. 133, 164101 (2010).
 * [5]  Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011).
 */
 
#ifndef NONBONDED_NONBONDEDINTERACTION_HPP
#define NONBONDED_NONBONDEDINTERACTION_HPP

#include "types/AtomType.hpp"
#include "math/SquareMatrix3.hpp"

using namespace std;
namespace OpenMD {

  /** 
   * The InteractionFamily enum.
   *
   * This is used to sort different types of non-bonded interaction
   * and to prevent multiple interactions in the same family from
   * being applied to any given pair of atom types.
   */
  enum InteractionFamily {
    NO_FAMILY = 0,             /**< No family defined */
    VANDERWAALS_FAMILY = 1,    /**< Long-range dispersion and short-range pauli repulsion */
    ELECTROSTATIC_FAMILY = 2,  /**< Coulombic and point-multipole interactions */
    METALLIC_FAMILY = 3,       /**< Transition metal interactions involving electron density */
    HYDROGENBONDING_FAMILY = 4,/**< Short-range directional interactions */
    N_INTERACTION_FAMILIES = 5
  };

  /**
   * Boolean flags for the iHash_ data structure. These are used to
   * greatly increase the speed of looking up the low-level
   * interaction for any given pair:
   */
  const static int ELECTROSTATIC_PAIR  = (1 << 0);  
  const static int LJ_PAIR             = (1 << 1);
  const static int EAM_PAIR            = (1 << 2);
  const static int SC_PAIR             = (1 << 3);
  const static int STICKY_PAIR         = (1 << 4);
  const static int GB_PAIR             = (1 << 5);
  const static int MORSE_PAIR          = (1 << 6);
  const static int REPULSIVEPOWER_PAIR = (1 << 7);
  const static int MAW_PAIR            = (1 << 8);

  typedef Vector<RealType, N_INTERACTION_FAMILIES> potVec;

  /**
   * The InteractionData struct.  
   *
   * This is used to pass pointers to data to specific non-bonded
   * interactions for force calculations.  Not all of the struct
   * members are utilized by any given interaction.
   */
  struct InteractionData {
    pair<AtomType*, AtomType*> atypes; /**< pair of atom types interacting */
    int atid1;                /**< atomType ident for atom 1 */
    int atid2;                /**< atomType ident for atom 2 */
    Vector3d* d;              /**< interatomic vector (already wrapped into box) */
    RealType* rij;            /**< interatomic separation */
    RealType* r2;             /**< square of rij */
    RealType* rcut;           /**< cutoff radius for this interaction */
    bool shiftedPot;          /**< shift the potential up inside the cutoff? */
    bool shiftedForce;        /**< shifted forces smoothly inside the cutoff? */
    RealType* sw;             /**< switching function value at rij */
    int* topoDist;            /**< topological distance between atoms */
    bool excluded;            /**< is this excluded from *direct* pairwise interactions? (some indirect interactions may still apply) */
    RealType* vdwMult;        /**< multiplier for van der Waals interactions */
    RealType* electroMult;    /**< multiplier for electrostatic interactions */
    potVec* pot;              /**< total potential */
    potVec* excludedPot;      /**< potential energy excluded from the overall calculation */
    RealType* vpair;          /**< pair potential */
    bool doParticlePot;       /**< should we bother with the particle pot? */
    bool doElectricField;     /**< should we bother with the electric field? */
    RealType* particlePot1;   /**< pointer to particle potential for atom1 */
    RealType* particlePot2;   /**< pointer to particle potential for atom2 */
    Vector3d* f1;             /**< force between the two atoms */
    RotMat3x3d* A1;           /**< pointer to rotation matrix of first atom */
    RotMat3x3d* A2;           /**< pointer to rotation matrix of second atom */
    Vector3d* dipole1;        /**< pointer to dipole vector of first atom */
    Vector3d* dipole2;        /**< pointer to dipole vector of first atom */
    Mat3x3d* quadrupole1;     /**< pointer to quadrupole tensor of first atom */
    Mat3x3d* quadrupole2;     /**< pointer to quadrupole tensor of first atom */
    Vector3d* t1;             /**< pointer to torque on first atom */
    Vector3d* t2;             /**< pointer to torque on second atom */
    RealType* rho1;           /**< total electron density at first atom */
    RealType* rho2;           /**< total electron density at second atom */
    RealType* frho1;          /**< density functional at first atom */
    RealType* frho2;          /**< density functional at second atom */
    RealType* dfrho1;         /**< derivative of functional for atom 1 */
    RealType* dfrho2;         /**< derivative of functional for atom 2 */
    RealType* flucQ1;         /**< fluctuating charge on atom1 */
    RealType* flucQ2;         /**< fluctuating charge on atom2 */
    RealType* dVdFQ1;         /**< fluctuating charge force on atom1 */
    RealType* dVdFQ2;         /**< fluctuating charge force on atom2 */
    Vector3d* eField1;        /**< pointer to electric field on first atom */
    Vector3d* eField2;        /**< pointer to electric field on second atom */
    RealType* skippedCharge1; /**< charge skipped on atom1 in pairwise interaction loop with atom2 */
    RealType* skippedCharge2; /**< charge skipped on atom2 in pairwise interaction loop with atom1 */
  };
  
  /** 
   * The SelfData struct.
   * 
   * This is used to pass pointers to data for the self-interaction or
   * derived information on a single atom after a pass through all
   * other interactions.  This is used by electrostatic methods that
   * have long-range corrections involving interactions with a medium
   * or a boundary and also by specific metal interactions for
   * electron density functional calculations.  Not all of the struct
   * members are utilized by any given self interaction.
   */
  struct SelfData {
    AtomType* atype;        /**< pointer to AtomType of the atom */
    int atid;               /**< atomType ident for the atom */
    Vector3d* dipole;       /**< pointer to dipole vector of the atom */
    Mat3x3d* quadrupole;    /**< pointer to quadrupole tensor of the atom */
    RealType* skippedCharge;/**< charge skipped in pairwise interaction loop */
    potVec* pot;            /**< total potential */
    potVec* excludedPot;    /**< potential energy excluded from the overall calculation */
    bool doParticlePot;     /**< should we bother with the particle pot? */
    RealType* particlePot;  /**< contribution to potential from this particle */
    Vector3d* t;            /**< pointer to resultant torque on atom */
    RealType* rho;          /**< electron density */
    RealType* frho;         /**< value of density functional for atom */
    RealType* dfrhodrho;    /**< derivative of density functional for atom */
    RealType* flucQ;        /**< current value of atom's fluctuating charge */
    RealType* dVdFQ;        /**< fluctuating charge derivative */
  };
  
    
  /**
   * The basic interface for non-bonded interactions.  
   */
  class NonBondedInteraction {
  public:
    NonBondedInteraction() {}
    virtual ~NonBondedInteraction() {}
    virtual void calcForce(InteractionData &idat) = 0;
    virtual InteractionFamily getFamily() = 0;
    virtual int getHash() = 0;
    virtual RealType getSuggestedCutoffRadius(pair<AtomType*, AtomType*> atypes) = 0;
    virtual string getName() =  0;
  };    

  /**
   * The basic interface for van der Waals interactions.
   */
  class VanDerWaalsInteraction : public NonBondedInteraction {
  public:
    VanDerWaalsInteraction() : NonBondedInteraction() { }
    virtual ~VanDerWaalsInteraction() {}
    virtual InteractionFamily getFamily() {return VANDERWAALS_FAMILY;}
  };    

  /**
   * The basic interface for electrostatic interactions.
   */
  class ElectrostaticInteraction : public NonBondedInteraction {
  public:
    ElectrostaticInteraction() : NonBondedInteraction() { }
    virtual ~ElectrostaticInteraction() {}
    virtual void calcSelfCorrection(SelfData &sdat) = 0;
    virtual InteractionFamily getFamily() {return ELECTROSTATIC_FAMILY;}   
    virtual int getHash() {return ELECTROSTATIC_PAIR;}
  };    

  /**
   * The basic interface for metallic interactions.
   */
  class MetallicInteraction : public NonBondedInteraction {
  public:
    MetallicInteraction() : NonBondedInteraction() { }
    virtual ~MetallicInteraction() {}
    virtual void calcDensity(InteractionData &idat) = 0;
    virtual void calcFunctional(SelfData &sdat) = 0;
    virtual InteractionFamily getFamily() {return METALLIC_FAMILY;}
  };
          
  /**
   * The basic interface for hydrogen bonding interactions.
   */
  class HydrogenBondingInteraction : public NonBondedInteraction {
  public:
    HydrogenBondingInteraction() : NonBondedInteraction() { }
    virtual ~HydrogenBondingInteraction() {}
    virtual InteractionFamily getFamily() {return HYDROGENBONDING_FAMILY;}
  };    

} //end namespace OpenMD
#endif
Revision:	1895
Committed:	Mon Jul 1 21:09:37 2013 UTC (12 years, 1 month ago) by gezelter
File size:	11028 byte(s)
Log Message:	Speed!
#	User	Rev	Content
1	gezelter	1502	/*
2			* Copyright (c) 2005 The University of Notre Dame. All Rights Reserved.
3			*
4			* The University of Notre Dame grants you ("Licensee") a
5			* non-exclusive, royalty free, license to use, modify and
6			* redistribute this software in source and binary code form, provided
7			* that the following conditions are met:
8			*
9			* 1. Redistributions of source code must retain the above copyright
10			* notice, this list of conditions and the following disclaimer.
11			*
12			* 2. Redistributions in binary form must reproduce the above copyright
13			* notice, this list of conditions and the following disclaimer in the
14			* documentation and/or other materials provided with the
15			* distribution.
16			*
17			* This software is provided "AS IS," without a warranty of any
18			* kind. All express or implied conditions, representations and
19			* warranties, including any implied warranty of merchantability,
20			* fitness for a particular purpose or non-infringement, are hereby
21			* excluded. The University of Notre Dame and its licensors shall not
22			* be liable for any damages suffered by licensee as a result of
23			* using, modifying or distributing the software or its
24			* derivatives. In no event will the University of Notre Dame or its
25			* licensors be liable for any lost revenue, profit or data, or for
26			* direct, indirect, special, consequential, incidental or punitive
27			* damages, however caused and regardless of the theory of liability,
28			* arising out of the use of or inability to use software, even if the
29			* University of Notre Dame has been advised of the possibility of
30			* such damages.
31			*
32			* SUPPORT OPEN SCIENCE! If you use OpenMD or its source code in your
33			* research, please cite the appropriate papers when you publish your
34			* work. Good starting points are:
35			*
36			* [1] Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).
37			* [2] Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).
38	gezelter	1879	* [3] Sun, Lin & Gezelter, J. Chem. Phys. 128, 234107 (2008).
39	gezelter	1665	* [4] Kuang & Gezelter, J. Chem. Phys. 133, 164101 (2010).
40			* [5] Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011).
41	gezelter	1502	*/
42
43			#ifndef NONBONDED_NONBONDEDINTERACTION_HPP
44			#define NONBONDED_NONBONDEDINTERACTION_HPP
45
46			#include "types/AtomType.hpp"
47			#include "math/SquareMatrix3.hpp"
48
49			using namespace std;
50			namespace OpenMD {
51
52			/**
53			* The InteractionFamily enum.
54			*
55			* This is used to sort different types of non-bonded interaction
56			* and to prevent multiple interactions in the same family from
57			* being applied to any given pair of atom types.
58			*/
59			enum InteractionFamily {
60	gezelter	1582	NO_FAMILY = 0, /*< No family defined /
61			VANDERWAALS_FAMILY = 1, /*< Long-range dispersion and short-range pauli repulsion /
62			ELECTROSTATIC_FAMILY = 2, /*< Coulombic and point-multipole interactions /
63			METALLIC_FAMILY = 3, /*< Transition metal interactions involving electron density /
64			HYDROGENBONDING_FAMILY = 4,/*< Short-range directional interactions /
65			N_INTERACTION_FAMILIES = 5
66	gezelter	1502	};
67
68	gezelter	1895	/**
69			* Boolean flags for the iHash_ data structure. These are used to
70			* greatly increase the speed of looking up the low-level
71			* interaction for any given pair:
72			*/
73			const static int ELECTROSTATIC_PAIR = (1 << 0);
74			const static int LJ_PAIR = (1 << 1);
75			const static int EAM_PAIR = (1 << 2);
76			const static int SC_PAIR = (1 << 3);
77			const static int STICKY_PAIR = (1 << 4);
78			const static int GB_PAIR = (1 << 5);
79			const static int MORSE_PAIR = (1 << 6);
80			const static int REPULSIVEPOWER_PAIR = (1 << 7);
81			const static int MAW_PAIR = (1 << 8);
82
83	gezelter	1554	typedef Vector<RealType, N_INTERACTION_FAMILIES> potVec;
84
85	gezelter	1502	/**
86			* The InteractionData struct.
87			*
88	gezelter	1554	* This is used to pass pointers to data to specific non-bonded
89			* interactions for force calculations. Not all of the struct
90			* members are utilized by any given interaction.
91	gezelter	1502	*/
92			struct InteractionData {
93	gezelter	1571	pair<AtomType, AtomType> atypes; /*< pair of atom types interacting /
94	gezelter	1895	int atid1; /*< atomType ident for atom 1 /
95			int atid2; /*< atomType ident for atom 2 /
96	gezelter	1554	Vector3d* d; /*< interatomic vector (already wrapped into box) /
97			RealType* rij; /*< interatomic separation /
98			RealType* r2; /*< square of rij /
99			RealType* rcut; /*< cutoff radius for this interaction /
100	gezelter	1583	bool shiftedPot; /*< shift the potential up inside the cutoff? /
101			bool shiftedForce; /*< shifted forces smoothly inside the cutoff? /
102	gezelter	1554	RealType* sw; /*< switching function value at rij /
103			int* topoDist; /*< topological distance between atoms /
104	gezelter	1587	bool excluded; /*< is this excluded from direct* pairwise interactions? (some indirect interactions may still apply) */
105	gezelter	1554	RealType* vdwMult; /*< multiplier for van der Waals interactions /
106			RealType* electroMult; /*< multiplier for electrostatic interactions /
107			potVec* pot; /*< total potential /
108	gezelter	1760	potVec* excludedPot; /*< potential energy excluded from the overall calculation /
109	gezelter	1554	RealType* vpair; /*< pair potential /
110	gezelter	1711	bool doParticlePot; /*< should we bother with the particle pot? /
111	gezelter	1879	bool doElectricField; /*< should we bother with the electric field? /
112	gezelter	1575	RealType* particlePot1; /*< pointer to particle potential for atom1 /
113			RealType* particlePot2; /*< pointer to particle potential for atom2 /
114	gezelter	1554	Vector3d* f1; /*< force between the two atoms /
115			RotMat3x3d* A1; /*< pointer to rotation matrix of first atom /
116			RotMat3x3d* A2; /*< pointer to rotation matrix of second atom /
117	gezelter	1879	Vector3d* dipole1; /*< pointer to dipole vector of first atom /
118			Vector3d* dipole2; /*< pointer to dipole vector of first atom /
119			Mat3x3d* quadrupole1; /*< pointer to quadrupole tensor of first atom /
120			Mat3x3d* quadrupole2; /*< pointer to quadrupole tensor of first atom /
121	gezelter	1554	Vector3d* t1; /*< pointer to torque on first atom /
122			Vector3d* t2; /*< pointer to torque on second atom /
123			RealType* rho1; /*< total electron density at first atom /
124			RealType* rho2; /*< total electron density at second atom /
125	gezelter	1575	RealType* frho1; /*< density functional at first atom /
126			RealType* frho2; /*< density functional at second atom /
127			RealType* dfrho1; /*< derivative of functional for atom 1 /
128			RealType* dfrho2; /*< derivative of functional for atom 2 /
129	gezelter	1721	RealType* flucQ1; /*< fluctuating charge on atom1 /
130			RealType* flucQ2; /*< fluctuating charge on atom2 /
131			RealType* dVdFQ1; /*< fluctuating charge force on atom1 /
132			RealType* dVdFQ2; /*< fluctuating charge force on atom2 /
133			Vector3d* eField1; /*< pointer to electric field on first atom /
134			Vector3d* eField2; /*< pointer to electric field on second atom /
135	gezelter	1587	RealType* skippedCharge1; /*< charge skipped on atom1 in pairwise interaction loop with atom2 /
136			RealType* skippedCharge2; /*< charge skipped on atom2 in pairwise interaction loop with atom1 /
137	gezelter	1502	};
138	gezelter	1545
139	gezelter	1502	/**
140	gezelter	1545	* The SelfData struct.
141	gezelter	1502	*
142	gezelter	1554	* This is used to pass pointers to data for the self-interaction or
143			* derived information on a single atom after a pass through all
144			* other interactions. This is used by electrostatic methods that
145			* have long-range corrections involving interactions with a medium
146			* or a boundary and also by specific metal interactions for
147			* electron density functional calculations. Not all of the struct
148			* members are utilized by any given self interaction.
149	gezelter	1502	*/
150	gezelter	1545	struct SelfData {
151	gezelter	1575	AtomType* atype; /*< pointer to AtomType of the atom /
152	gezelter	1895	int atid; /*< atomType ident for the atom /
153	gezelter	1879	Vector3d* dipole; /*< pointer to dipole vector of the atom /
154			Mat3x3d* quadrupole; /*< pointer to quadrupole tensor of the atom /
155	gezelter	1575	RealType* skippedCharge;/*< charge skipped in pairwise interaction loop /
156			potVec* pot; /*< total potential /
157	gezelter	1761	potVec* excludedPot; /*< potential energy excluded from the overall calculation /
158	gezelter	1711	bool doParticlePot; /*< should we bother with the particle pot? /
159	gezelter	1575	RealType* particlePot; /*< contribution to potential from this particle /
160			Vector3d* t; /*< pointer to resultant torque on atom /
161			RealType* rho; /*< electron density /
162			RealType* frho; /*< value of density functional for atom /
163			RealType* dfrhodrho; /*< derivative of density functional for atom /
164	jmichalk	1734	RealType* flucQ; /*< current value of atom's fluctuating charge /
165			RealType* dVdFQ; /*< fluctuating charge derivative /
166	gezelter	1502	};
167
168
169			/**
170			* The basic interface for non-bonded interactions.
171			*/
172			class NonBondedInteraction {
173			public:
174			NonBondedInteraction() {}
175			virtual ~NonBondedInteraction() {}
176	gezelter	1536	virtual void calcForce(InteractionData &idat) = 0;
177	gezelter	1502	virtual InteractionFamily getFamily() = 0;
178	gezelter	1895	virtual int getHash() = 0;
179	gezelter	1545	virtual RealType getSuggestedCutoffRadius(pair<AtomType, AtomType> atypes) = 0;
180	gezelter	1502	virtual string getName() = 0;
181			};
182
183			/**
184			* The basic interface for van der Waals interactions.
185			*/
186			class VanDerWaalsInteraction : public NonBondedInteraction {
187			public:
188			VanDerWaalsInteraction() : NonBondedInteraction() { }
189			virtual ~VanDerWaalsInteraction() {}
190			virtual InteractionFamily getFamily() {return VANDERWAALS_FAMILY;}
191			};
192
193			/**
194			* The basic interface for electrostatic interactions.
195			*/
196			class ElectrostaticInteraction : public NonBondedInteraction {
197			public:
198			ElectrostaticInteraction() : NonBondedInteraction() { }
199			virtual ~ElectrostaticInteraction() {}
200	gezelter	1545	virtual void calcSelfCorrection(SelfData &sdat) = 0;
201	gezelter	1895	virtual InteractionFamily getFamily() {return ELECTROSTATIC_FAMILY;}
202			virtual int getHash() {return ELECTROSTATIC_PAIR;}
203	gezelter	1502	};
204
205			/**
206			* The basic interface for metallic interactions.
207			*/
208			class MetallicInteraction : public NonBondedInteraction {
209			public:
210			MetallicInteraction() : NonBondedInteraction() { }
211			virtual ~MetallicInteraction() {}
212	gezelter	1545	virtual void calcDensity(InteractionData &idat) = 0;
213			virtual void calcFunctional(SelfData &sdat) = 0;
214	gezelter	1502	virtual InteractionFamily getFamily() {return METALLIC_FAMILY;}
215			};
216
217			/**
218			* The basic interface for hydrogen bonding interactions.
219			*/
220			class HydrogenBondingInteraction : public NonBondedInteraction {
221			public:
222			HydrogenBondingInteraction() : NonBondedInteraction() { }
223			virtual ~HydrogenBondingInteraction() {}
224			virtual InteractionFamily getFamily() {return HYDROGENBONDING_FAMILY;}
225			};
226
227			} //end namespace OpenMD
228			#endif