forked from lijiext/lammps
128 lines
3.4 KiB
C
128 lines
3.4 KiB
C
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/** ATC_HardyKernel: Hardy smoothing */
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#ifndef ATC_HARDY_KERNEL_H
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#define ATC_HARDY_KERNEL_H
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#include "LammpsInterface.h"
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#include "MatrixLibrary.h"
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namespace ATC {
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class ATC_HardyKernel {
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public:
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// constructor
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ATC_HardyKernel(int nparameters, double* parameters);
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// destructor
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virtual ~ATC_HardyKernel() {};
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// function value
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virtual double value(DENS_VEC& x_atom)=0;
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// bond function value via quadrature
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virtual double bond(DENS_VEC& xa, DENS_VEC&xb, double lam1, double lam2);
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// localization-volume intercepts for bond calculation
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virtual void bond_intercepts(DENS_VEC& xa,
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DENS_VEC& xb, double &lam1, double &lam2);
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double inv_vol(void) { return invVol_; }
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protected:
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double invVol_; // normalization factor
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double Rc_, invRc_; // cutoff radius
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int nsd_ ; // number of dimensions
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/** pointer to lammps interface class */
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LammpsInterface * lammpsInterface_;
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/** periodicity flags and lengths */
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int periodicity[3];
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double box_bounds[2][3];
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double box_length[3];
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};
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/** a step with spherical support */
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class ATC_HardyKernelStep : public ATC_HardyKernel {
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public:
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// constructor
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ATC_HardyKernelStep(int nparameters, double* parameters);
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// destructor
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virtual ~ATC_HardyKernelStep() {};
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// function value
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double value(DENS_VEC& x_atom);
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// bond function value
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virtual double bond(DENS_VEC& xa, DENS_VEC&xb, double lam1, double lam2)
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{return lam2 -lam1;}
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};
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/** a step with rectangular support suitable for a rectangular grid */
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class ATC_HardyKernelCell : public ATC_HardyKernel {
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public:
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// constructor
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ATC_HardyKernelCell(int nparameters, double* parameters);
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// destructor
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virtual ~ATC_HardyKernelCell() {};
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// function value
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virtual double value(DENS_VEC& x_atom);
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// bond function value
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virtual double bond(DENS_VEC& xa, DENS_VEC&xb, double lam1, double lam2)
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{return lam2 -lam1;}
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// bond intercept values : origin is the node position
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void bond_intercepts(DENS_VEC& xa,
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DENS_VEC& xb, double &lam1, double &lam2);
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protected:
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double hx, hy, hz;
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DENS_VEC cellBounds_;
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};
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class ATC_HardyKernelCubicSphere : public ATC_HardyKernel {
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public:
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// constructor
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ATC_HardyKernelCubicSphere(int nparameters, double* parameters);
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// destructor
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virtual ~ATC_HardyKernelCubicSphere() {};
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// function value
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virtual double value(DENS_VEC& x_atom);
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};
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class ATC_HardyKernelQuarticSphere : public ATC_HardyKernel {
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public:
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// constructor
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ATC_HardyKernelQuarticSphere(int nparameters, double* parameters);
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// destructor
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virtual ~ATC_HardyKernelQuarticSphere() {};
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// function value
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virtual double value(DENS_VEC& x_atom);
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};
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class ATC_HardyKernelCubicCyl : public ATC_HardyKernel {
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public:
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// constructor
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ATC_HardyKernelCubicCyl(int nparameters, double* parameters);
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// destructor
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virtual ~ATC_HardyKernelCubicCyl() {};
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// function value
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virtual double value(DENS_VEC& x_atom) ;
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};
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class ATC_HardyKernelQuarticCyl : public ATC_HardyKernel {
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public:
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// constructor
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ATC_HardyKernelQuarticCyl(int nparameters, double* parameters);
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// destructor
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virtual ~ATC_HardyKernelQuarticCyl() {};
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// function value
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virtual double value(DENS_VEC& x_atom);
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};
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};
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#endif
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