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LSST Data Management Base Package
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Weather.cc
Go to the documentation of this file.
1// -*- lsst-c++ -*-
2
3/*
4 * LSST Data Management System
5 * Copyright 2016 LSST Corporation.
6 *
7 * This product includes software developed by the
8 * LSST Project (http://www.lsst.org/).
9 *
10 * This program is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation, either version 3 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the LSST License Statement and
21 * the GNU General Public License along with this program. If not,
22 * see <http://www.lsstcorp.org/LegalNotices/>.
23 */
24
25#include <cmath>
26#include <sstream>
27
29#include "lsst/pex/exceptions.h"
31
32namespace lsst {
33namespace afw {
34namespace coord {
35
36Weather::Weather(double airTemperature, double airPressure, double humidity)
37 : _airTemperature(airTemperature), _airPressure(airPressure), _humidity(humidity) {
38 validate();
39}
40
41bool Weather::operator==(Weather const& other) const noexcept {
42 // Weather may be initialized to NaN values as a placeholder, or to indicate "unknown".
43 bool tempMatch = (std::isnan(_airTemperature) && std::isnan(other.getAirTemperature())) ||
44 _airTemperature == other.getAirTemperature();
45 bool presMatch = (std::isnan(_airPressure) && std::isnan(other.getAirPressure())) ||
46 _airPressure == other.getAirPressure();
47 bool humiMatch =
48 (std::isnan(_humidity) && std::isnan(other.getHumidity())) || _humidity == other.getHumidity();
49 return (tempMatch && presMatch && humiMatch);
50}
51
53 // Completely arbitrary seed
54 return cpputils::hashCombine(17, _airTemperature, _airPressure, _humidity);
55}
56
57void Weather::validate() const {
58 if (_humidity < 0.0) { // allow > 100 even though supersaturation is most unlikely
60 os << "Relative humidity = " << _humidity << " must not be negative";
62 }
63}
64
66 return os << "Weather(" << weath.getAirTemperature() << ", " << weath.getAirPressure() << ", "
67 << weath.getHumidity() << ")";
68}
69} // namespace coord
70} // namespace afw
71} // namespace lsst
#define LSST_EXCEPT(type,...)
Create an exception with a given type.
Definition Exception.h:48
Basic weather information sufficient for a simple model for air mass or refraction.
Definition Weather.h:38
bool operator==(Weather const &other) const noexcept
Definition Weather.cc:41
double getHumidity() const noexcept
get outside relative humidity (%)
Definition Weather.h:70
double getAirPressure() const noexcept
get outside air pressure (Pascal)
Definition Weather.h:67
double getAirTemperature() const noexcept
get outside air temperature (C)
Definition Weather.h:64
Weather(double airTemperature, double airPressure, double humidity)
Construct a Weather.
Definition Weather.cc:36
std::size_t hash_value() const noexcept
Return a hash of this object.
Definition Weather.cc:52
Reports invalid arguments.
Definition Runtime.h:66
T isnan(T... args)
std::ostream & operator<<(std::ostream &os, Observatory const &obs)
Print an Observatory to the stream.
std::size_t hashCombine(std::size_t seed) noexcept
Combine hashes.
Definition hashCombine.h:35
T str(T... args)