Constants.hpp

// sciplot - a modern C++ scientific plotting library powered by gnuplot
// https://github.com/sciplot/sciplot
//
// Licensed under the MIT License <http://opensource.org/licenses/MIT>.
//
// Copyright (c) 2018-2021 Allan Leal
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
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//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// SOFTWARE.
 
#pragma once
 
// C++ includes
#include <limits>
#include <string>
 
namespace sciplot {
 
const auto PI = 3.14159265359;
const auto GOLDEN_RATIO = 1.618034;
const auto GOLDEN_RATIO_INVERSE = 1.0 / GOLDEN_RATIO;
const auto INCH_TO_POINTS = 72.0; // based on pdfcairo terminal conversion
const auto POINT_TO_INCHES = 1.0 / INCH_TO_POINTS;
 
constexpr auto NaN = std::numeric_limits<double>::quiet_NaN(); // can be used to indicate missing values in a numeric vector
const auto MISSING_INDICATOR = "\"?\""; // The string used to indicate missing y values.
 
} // namespace sciplot