Function almost_equal

src/fl/math/math.h:90–92

template <typename T, typename U>
constexpr inline bool almost_equal(T a, T b, U tolerance) FL_NOEXCEPT {
    return fl::abs(a - b) < tolerance;
}

inline bool almost_equal(float a, float b) FL_NOEXCEPT {
    return fl::abs(a - b) < FL_EPSILON_F;