HelpFunctions.hpp

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//
// Created by jstark on 2019-11-08.
//
#ifndef REDISTANCING_SUSSMAN_HELPFUNCTIONS_HPP
#define REDISTANCING_SUSSMAN_HELPFUNCTIONS_HPP

#include <iostream>
#include <fstream>
template <class T>
int sgn(T val)
{
    return (T(0) < val) - (val < T(0));
}
template <typename T>
T smooth_S(T val, T epsilon)
{
    return (val / sqrt(val * val + epsilon * epsilon));
}


template <class T>
bool isApproxEqual(T val1, T val2, T tolerance)
{
    return (val1 <= val2 + tolerance && val1 >= val2 - tolerance);
}

template <typename T>
void append_value_to_textfile(std::string & textfile, T value)
{
    std::ofstream out(textfile);
    out << value;
}

template <typename T>
std::string to_string_with_precision(const T myValue, const size_t n = 6)
{
    std::ostringstream out;
    out.precision(n);
    out << std::fixed << myValue;
    return out.str();
}


#endif //REDISTANCING_SUSSMAN_HELPFUNCTIONS_HPP