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, 24107 (2008).          
 * [4]  Vardeman & Gezelter, in progress (2009).                        
 */
 
#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,             /**< No family defined */
    VANDERWAALS_FAMILY,    /**< Long-range dispersion and short-range pauli repulsion */
    ELECTROSTATIC_FAMILY,  /**< Coulombic and point-multipole interactions */
    METALLIC_FAMILY,       /**< Transition metal interactions involving electron density */
    HYDROGENBONDING_FAMILY,/**< Short-range directional interactions */
    N_INTERACTION_FAMILIES
  };

  /**
   * The InteractionData struct.  
   *
   * This is used to pass data to specific non-bonded interactions for
   * force calculations.  Not all of the struct members are utilized
   * by any given interaction.
   */
  struct InteractionData {
    AtomType* atype1;     /**< pointer to AtomType of first atom */
    AtomType* atype2;     /**< pointer to AtomType of second atom */
    Vector3d d;           /**< interatomic vector (already wrapped into box) */
    RealType rij;         /**< interatomic separation (precomputed) */
    RealType r2;          /**< square of rij (precomputed) */
    RealType rcut;        /**< cutoff radius for this interaction */
    RealType sw;          /**< switching function value at rij (precomputed) */
    RealType vdwMult;     /**< multiplier for van der Waals interactions */
    RealType electroMult; /**< multiplier for electrostatic interactions */
    RealType pot[4];      /**< total potential */
    RealType vpair[4];    /**< pair potential */
    Vector3d f1;          /**< force between the two atoms */
    Mat3x3d eFrame1;      /**< pointer to electrostatic frame for first atom */
    Mat3x3d eFrame2;      /**< pointer to electrostatic frame for second atom*/
    RotMat3x3d A1;        /**< pointer to rotation matrix of first atom */
    RotMat3x3d A2;        /**< pointer to rotation matrix of second atom */
    Vector3d t1;          /**< pointer to torque on first atom */
    Vector3d t2;          /**< pointer to torque on second atom */
    RealType rho1;        /**< electron density at first atom */
    RealType rho2;        /**< electron density at second atom */
    RealType dfrho1;      /**< derivative of density functional for atom 1 */
    RealType dfrho2;      /**< derivative of density functional for atom 2 */
    RealType fshift1;     /**< indirect potential contribution from atom 1 */
    RealType fshift2;     /**< indirect potential contribution from atom 2 */
  };
  
  /** 
   * The SkipCorrectionData struct.
   *
   * This is used to pass data for corrections due to "skipped" pairs
   * of atoms.  These are atoms that are topologically bonded to each
   * other, but which have indirect effects by way of long range
   * interactions.  In the normal pair interaction loop, these atoms
   * are skipped entirely, so a second pass must be made to compute
   * their indirect interactions on each other.
   */
  struct SkipCorrectionData {
    AtomType* atype1;      /**< pointer to AtomType of first atom */
    AtomType* atype2;      /**< pointer to AtomType of second atom */
    Vector3d d;            /**< interatomic vector (already wrapped into box) */
    RealType rij;          /**< interatomic separation (precomputed) */
    RealType skippedCharge1; /**< charge skipped in normal pairwise interaction loop */
    RealType skippedCharge2; /**< charge skipped in normal pairwise interaction loop */
    RealType sw;           /**< switching function value at rij (precomputed) */
    RealType electroMult;  /**< multiplier for electrostatic interactions */
    RealType pot[4];       /**< total potential */
    RealType vpair[4];     /**< pair potential */
    Vector3d f1;           /**< force correction */
    Mat3x3d eFrame1;       /**< pointer to electrostatic frame for first atom */
    Mat3x3d eFrame2;       /**< pointer to electrostatic frame for second atom*/
    Vector3d t1;           /**< pointer to torque on first atom */
    Vector3d t2;           /**< pointer to torque on second atom */
  };

  /** 
   * The SelfCorrectionData struct.
   * 
   * This is used to pass data for the self-interaction (used by
   * electrostatic methods) that have long-range corrections involving
   * interactions with a medium or a boundary.
   */
  struct SelfCorrectionData {
    AtomType* atype;        /**< pointer to AtomType of the atom */
    Mat3x3d eFrame;        /**< pointer to electrostatic frame for first atom */
    RealType skippedCharge; /**< charge skipped in normal pairwise interaction loop */
    RealType pot[4];       /**< total potential contribution */
    Vector3d t;            /**< pointer to resultant torque on atom */
  };


  /**
   * The DensityData struct.  
   *
   * This is used to pass data to specific metallic interactions for
   * electron density calculations.  
   */
  
  struct DensityData {
    AtomType* atype1;     /**< pointer to AtomType of first atom */
    AtomType* atype2;     /**< pointer to AtomType of second atom */
    RealType rij;         /**< interatomic separation (precomputed) */
    RealType rho_i_at_j;  /**< electron density at second atom due to first */
    RealType rho_j_at_i;  /**< electron density at first atom due to second */
  };
  
  /**
   * The FunctionalData struct.  
   *
   * This is used to pass data to specific metallic interactions for
   * electron density functional calculations.  
   */
  
  struct FunctionalData {
    AtomType* atype;     /**< pointer to AtomType of the atom */
    RealType rho;        /**< electron density (precomputed) */
    RealType frho;       /**< value of density functional for the atom */
    RealType dfrhodrho;  /**< derivative of density functional for the atom */
  };
    
  /**
   * The basic interface for non-bonded interactions.  
   */
  class NonBondedInteraction {
  public:
    NonBondedInteraction() {}
    virtual ~NonBondedInteraction() {}
    virtual void calcForce(InteractionData &idat) = 0;
    virtual InteractionFamily getFamily() = 0;
    virtual RealType getSuggestedCutoffRadius(AtomType* at1, AtomType* at2) = 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 calcSkipCorrection(SkipCorrectionData &skdat) = 0;
    virtual void calcSelfCorrection(SelfCorrectionData &scdat) = 0;
    virtual InteractionFamily getFamily() {return ELECTROSTATIC_FAMILY;}    
  };    

  /**
   * The basic interface for metallic interactions.
   */
  class MetallicInteraction : public NonBondedInteraction {
  public:
    MetallicInteraction() : NonBondedInteraction() { }
    virtual ~MetallicInteraction() {}
    virtual void calcDensity(DensityData &ddat) = 0;
    virtual void calcFunctional(FunctionalData &fdat) = 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:	1544
Committed:	Fri Mar 18 19:31:52 2011 UTC (14 years, 4 months ago) by gezelter
File size:	10190 byte(s)
Log Message:	More modifications for paralllel rewrite
#	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			* [3] Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).
39			* [4] Vardeman & Gezelter, in progress (2009).
40			*/
41
42			#ifndef NONBONDED_NONBONDEDINTERACTION_HPP
43			#define NONBONDED_NONBONDEDINTERACTION_HPP
44
45			#include "types/AtomType.hpp"
46			#include "math/SquareMatrix3.hpp"
47
48			using namespace std;
49			namespace OpenMD {
50
51			/**
52			* The InteractionFamily enum.
53			*
54			* This is used to sort different types of non-bonded interaction
55			* and to prevent multiple interactions in the same family from
56			* being applied to any given pair of atom types.
57			*/
58			enum InteractionFamily {
59			NO_FAMILY, /*< No family defined /
60			VANDERWAALS_FAMILY, /*< Long-range dispersion and short-range pauli repulsion /
61			ELECTROSTATIC_FAMILY, /*< Coulombic and point-multipole interactions /
62			METALLIC_FAMILY, /*< Transition metal interactions involving electron density /
63	gezelter	1544	HYDROGENBONDING_FAMILY,/*< Short-range directional interactions /
64			N_INTERACTION_FAMILIES
65	gezelter	1502	};
66
67			/**
68			* The InteractionData struct.
69			*
70			* This is used to pass data to specific non-bonded interactions for
71			* force calculations. Not all of the struct members are utilized
72			* by any given interaction.
73			*/
74			struct InteractionData {
75			AtomType* atype1; /*< pointer to AtomType of first atom /
76			AtomType* atype2; /*< pointer to AtomType of second atom /
77			Vector3d d; /*< interatomic vector (already wrapped into box) /
78			RealType rij; /*< interatomic separation (precomputed) /
79			RealType r2; /*< square of rij (precomputed) /
80			RealType rcut; /*< cutoff radius for this interaction /
81			RealType sw; /*< switching function value at rij (precomputed) /
82			RealType vdwMult; /*< multiplier for van der Waals interactions /
83			RealType electroMult; /*< multiplier for electrostatic interactions /
84	gezelter	1536	RealType pot[4]; /*< total potential /
85			RealType vpair[4]; /*< pair potential /
86			Vector3d f1; /*< force between the two atoms /
87			Mat3x3d eFrame1; /*< pointer to electrostatic frame for first atom /
88			Mat3x3d eFrame2; /*< pointer to electrostatic frame for second atom/
89			RotMat3x3d A1; /*< pointer to rotation matrix of first atom /
90			RotMat3x3d A2; /*< pointer to rotation matrix of second atom /
91			Vector3d t1; /*< pointer to torque on first atom /
92			Vector3d t2; /*< pointer to torque on second atom /
93	gezelter	1502	RealType rho1; /*< electron density at first atom /
94			RealType rho2; /*< electron density at second atom /
95			RealType dfrho1; /*< derivative of density functional for atom 1 /
96			RealType dfrho2; /*< derivative of density functional for atom 2 /
97			RealType fshift1; /*< indirect potential contribution from atom 1 /
98			RealType fshift2; /*< indirect potential contribution from atom 2 /
99			};
100
101			/**
102			* The SkipCorrectionData struct.
103			*
104			* This is used to pass data for corrections due to "skipped" pairs
105			* of atoms. These are atoms that are topologically bonded to each
106			* other, but which have indirect effects by way of long range
107			* interactions. In the normal pair interaction loop, these atoms
108			* are skipped entirely, so a second pass must be made to compute
109			* their indirect interactions on each other.
110			*/
111			struct SkipCorrectionData {
112	gezelter	1536	AtomType* atype1; /*< pointer to AtomType of first atom /
113			AtomType* atype2; /*< pointer to AtomType of second atom /
114			Vector3d d; /*< interatomic vector (already wrapped into box) /
115			RealType rij; /*< interatomic separation (precomputed) /
116			RealType skippedCharge1; /*< charge skipped in normal pairwise interaction loop /
117			RealType skippedCharge2; /*< charge skipped in normal pairwise interaction loop /
118			RealType sw; /*< switching function value at rij (precomputed) /
119			RealType electroMult; /*< multiplier for electrostatic interactions /
120			RealType pot[4]; /*< total potential /
121			RealType vpair[4]; /*< pair potential /
122			Vector3d f1; /*< force correction /
123			Mat3x3d eFrame1; /*< pointer to electrostatic frame for first atom /
124			Mat3x3d eFrame2; /*< pointer to electrostatic frame for second atom/
125			Vector3d t1; /*< pointer to torque on first atom /
126			Vector3d t2; /*< pointer to torque on second atom /
127	gezelter	1502	};
128
129			/**
130			* The SelfCorrectionData struct.
131			*
132			* This is used to pass data for the self-interaction (used by
133			* electrostatic methods) that have long-range corrections involving
134			* interactions with a medium or a boundary.
135			*/
136			struct SelfCorrectionData {
137			AtomType* atype; /*< pointer to AtomType of the atom /
138	gezelter	1504	Mat3x3d eFrame; /*< pointer to electrostatic frame for first atom /
139	gezelter	1502	RealType skippedCharge; /*< charge skipped in normal pairwise interaction loop /
140	gezelter	1536	RealType pot[4]; /*< total potential contribution /
141	gezelter	1504	Vector3d t; /*< pointer to resultant torque on atom /
142	gezelter	1502	};
143
144
145
146			/**
147			* The DensityData struct.
148			*
149			* This is used to pass data to specific metallic interactions for
150			* electron density calculations.
151			*/
152
153			struct DensityData {
154			AtomType* atype1; /*< pointer to AtomType of first atom /
155			AtomType* atype2; /*< pointer to AtomType of second atom /
156			RealType rij; /*< interatomic separation (precomputed) /
157			RealType rho_i_at_j; /*< electron density at second atom due to first /
158			RealType rho_j_at_i; /*< electron density at first atom due to second /
159			};
160
161			/**
162			* The FunctionalData struct.
163			*
164			* This is used to pass data to specific metallic interactions for
165			* electron density functional calculations.
166			*/
167
168			struct FunctionalData {
169			AtomType* atype; /*< pointer to AtomType of the atom /
170			RealType rho; /*< electron density (precomputed) /
171			RealType frho; /*< value of density functional for the atom /
172			RealType dfrhodrho; /*< derivative of density functional for the atom /
173			};
174
175			/**
176			* The basic interface for non-bonded interactions.
177			*/
178			class NonBondedInteraction {
179			public:
180			NonBondedInteraction() {}
181			virtual ~NonBondedInteraction() {}
182	gezelter	1536	virtual void calcForce(InteractionData &idat) = 0;
183	gezelter	1502	virtual InteractionFamily getFamily() = 0;
184	gezelter	1505	virtual RealType getSuggestedCutoffRadius(AtomType* at1, AtomType* at2) = 0;
185	gezelter	1502	virtual string getName() = 0;
186			};
187
188			/**
189			* The basic interface for van der Waals interactions.
190			*/
191			class VanDerWaalsInteraction : public NonBondedInteraction {
192			public:
193			VanDerWaalsInteraction() : NonBondedInteraction() { }
194			virtual ~VanDerWaalsInteraction() {}
195			virtual InteractionFamily getFamily() {return VANDERWAALS_FAMILY;}
196			};
197
198			/**
199			* The basic interface for electrostatic interactions.
200			*/
201			class ElectrostaticInteraction : public NonBondedInteraction {
202			public:
203			ElectrostaticInteraction() : NonBondedInteraction() { }
204			virtual ~ElectrostaticInteraction() {}
205	gezelter	1536	virtual void calcSkipCorrection(SkipCorrectionData &skdat) = 0;
206			virtual void calcSelfCorrection(SelfCorrectionData &scdat) = 0;
207			virtual InteractionFamily getFamily() {return ELECTROSTATIC_FAMILY;}
208	gezelter	1502	};
209
210			/**
211			* The basic interface for metallic interactions.
212			*/
213			class MetallicInteraction : public NonBondedInteraction {
214			public:
215			MetallicInteraction() : NonBondedInteraction() { }
216			virtual ~MetallicInteraction() {}
217	gezelter	1536	virtual void calcDensity(DensityData &ddat) = 0;
218			virtual void calcFunctional(FunctionalData &fdat) = 0;
219	gezelter	1502	virtual InteractionFamily getFamily() {return METALLIC_FAMILY;}
220			};
221
222			/**
223			* The basic interface for hydrogen bonding interactions.
224			*/
225			class HydrogenBondingInteraction : public NonBondedInteraction {
226			public:
227			HydrogenBondingInteraction() : NonBondedInteraction() { }
228			virtual ~HydrogenBondingInteraction() {}
229			virtual InteractionFamily getFamily() {return HYDROGENBONDING_FAMILY;}
230			};
231
232			} //end namespace OpenMD
233			#endif