interpolate.h
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			#ifndef INTERPOLATION_H
			#define INTERPOLATION_H

			#include "stdio.h"
			#include "stdlib.h"
			#include "string.h"
			#include "memory.h"

			extern "C" typedef struct { double r, i; } doublecomplex;

			using namespace std;

			class Interpolate{
			public:
			Interpolate(int, int, int, int, doublecomplex **);
			~Interpolate();

			void set_method();
			void execute(double , doublecomplex );
			void reset_gamma();

			int UseGamma;

			private:
			void tricubic_init();
			void tricubic(double , doublecomplex );
			void trilinear(double , doublecomplex );
			Memory *memory;

			int which;
			int Nx, Ny, Nz, Npt, ndim;
			int flag_reset_gamma, flag_allocated_dfs;

			doublecomplex **data;
			doublecomplex Dfdx, Dfdy, Dfdz, D2fdxdy, D2fdxdz, D2fdydz, **D3fdxdydz;
			double a[64], f[8], dfdx[8], dfdy[8], dfdz[8], d2fdxdy[8], d2fdxdz[8], d2fdydz[8], d3fdxdydz[8];
			int vidx[8];
			};

			#endif

lammps/tools/phonon/interpolate.h4c71beb02409master