#include <simple_math.h>

Public Member Functions
	KernelTables ()

Public Attributes
double	lambda [TABLE_SIZE]

double	eta [TABLE_SIZE]

double	lambdaA [TABLE_SIZE]

double	etaA [TABLE_SIZE]

Detailed Description

Definition at line 164 of file simple_math.h.

Constructor & Destructor Documentation

◆ KernelTables()

fmm::detail_interp::KernelTables::KernelTables ( )

inline

Definition at line 170 of file simple_math.h.

                   {
        constexpr double sqrtPi = 1.7724538509055159; // sqrt(π)
        for (int i = 0; i < TABLE_SIZE; ++i) {
            double xi = i / INV_STEP;
            if (xi < 1e-10) {
                lambda[i]  = 8.0 / (3.0 * sqrtPi);
                eta[i]     = 8.0 / (5.0 * sqrtPi);
                lambdaA[i] = 0.0;
                etaA[i]    = 0.0;
            } else {
                double xi2 = xi * xi, xi3 = xi2 * xi, xi4 = xi2 * xi2;
                double xi5 = xi3 * xi2, xi6 = xi4 * xi2;
                double e = std::erf(xi), ex = std::exp(-xi2);
                lambda[i]  = -e/xi3 + (2/sqrtPi)*(2 + 1/xi2)*ex;
                eta[i]     =  3*e/xi5 - (2/sqrtPi/xi2)*(2 + 3/xi2)*ex;
                lambdaA[i] =  3*e/xi4 - (8/sqrtPi)*(3/(4*xi3) + 1/(2*xi) + xi)*ex;
                etaA[i]    = -15*e/xi6 + (1/sqrtPi)*(8/xi + 20/xi3 + 30/xi5)*ex;
            }
        }
    }

Member Data Documentation

◆ eta

double fmm::detail_interp::KernelTables::eta[TABLE_SIZE]

Definition at line 166 of file simple_math.h.

◆ etaA

double fmm::detail_interp::KernelTables::etaA[TABLE_SIZE]

Definition at line 168 of file simple_math.h.

◆ lambda

double fmm::detail_interp::KernelTables::lambda[TABLE_SIZE]

Definition at line 165 of file simple_math.h.

◆ lambdaA

double fmm::detail_interp::KernelTables::lambdaA[TABLE_SIZE]

Definition at line 167 of file simple_math.h.

The documentation for this struct was generated from the following file:

VMfmm/common/simple_math.h

Public Member Functions

Public Attributes