Function cos_kernel

src/IB/IBMethod.cpp:117–128

namespace
{
inline double
cos_kernel(const double x, const double eps)
{
    if (std::abs(x) > eps)
    {
        return 0.0;
    }
    else
    {
        return 0.5 * (1.0 + std::cos(M_PI * x / eps)) / eps;
    }
} // cos_kernel

// Version of IBMethod restart file data.
static const int IB_METHOD_VERSION = 1;