ESPResSo
Extensible Simulation Package for Research on Soft Matter Systems
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uniform.hpp
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/*
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* Copyright (C) 2018-2022 The ESPResSo project
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*
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* ESPResSo is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* ESPResSo is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef UTILS_UNIFORM_HPP
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#define UTILS_UNIFORM_HPP
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#include <cinttypes>
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#include <limits>
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namespace
Utils
{
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/**
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* @brief Uniformly map unsigned integer to double.
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*
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* This maps a unsigned integer to the double interval
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* (0., 1.], where 0 is mapped to the smallest representable
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* value larger than 0., and the maximal integer value is
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* mapped to 1.
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*
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* @param in Unsigned integer value
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* @return Mapped floating point value.
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*/
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constexpr
inline
double
uniform
(uint64_t in) {
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auto
constexpr
const
max = std::numeric_limits<uint64_t>::max();
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auto
constexpr
const
fac = 1. / (
static_cast<
double
>
(max) + 1.);
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return
fac *
static_cast<
double
>
(in) + 0.5 * fac;
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}
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}
// namespace Utils
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#endif
// ESPRESSO_UNIFORM_HPP
Utils
Definition
Variant.hpp:40
Utils::uniform
constexpr double uniform(uint64_t in)
Uniformly map unsigned integer to double.
Definition
uniform.hpp:36
src
utils
include
utils
uniform.hpp
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