fmm::detail_interp Namespace Reference

Classes
struct	KernelTables

Functions
const KernelTables &	tables ()
std::pair< double, double >	lookup2 (const double *tA, const double *tB, double xi)

Variables
static constexpr int	TABLE_SIZE = 2049
static constexpr double	XI_MAX_INTERP = 5.0
static constexpr double	INV_STEP = (TABLE_SIZE - 1) / XI_MAX_INTERP

Function Documentation

lookup2()

std::pair< double, double > fmm::detail_interp::lookup2 ( const double *  tA, const double *  tB, double  xi  )

inline

Definition at line 197 of file simple_math.h.

                                                                                     {
    double idx_f = xi * INV_STEP;
    int    idx   = static_cast<int>(idx_f);
    if (idx >= TABLE_SIZE - 1) idx = TABLE_SIZE - 2;
    double frac  = idx_f - idx;
    double a = tA[idx] * (1.0 - frac) + tA[idx + 1] * frac;
    double b = tB[idx] * (1.0 - frac) + tB[idx + 1] * frac;
    return {a, b};
}

tables()

const KernelTables & fmm::detail_interp::tables ( )

inline

Definition at line 192 of file simple_math.h.

                                    {
    static const KernelTables t;
    return t;
}

Variable Documentation

INV_STEP

constexpr double fmm::detail_interp::INV_STEP = (TABLE_SIZE - 1) / XI_MAX_INTERP

staticconstexpr

Definition at line 162 of file simple_math.h.

TABLE_SIZE

constexpr int fmm::detail_interp::TABLE_SIZE = 2049

staticconstexpr

Definition at line 160 of file simple_math.h.

XI_MAX_INTERP

constexpr double fmm::detail_interp::XI_MAX_INTERP = 5.0

staticconstexpr

Definition at line 161 of file simple_math.h.