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Copy pathTarget.cpp
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144 lines (130 loc) · 3 KB
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/*
* Copyright 2010-2012 OpenXcom Developers.
*
* This file is part of OpenXcom.
*
* OpenXcom is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* OpenXcom is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenXcom. If not, see <http://www.gnu.org/licenses/>.
*/
#define _USE_MATH_DEFINES
#include "Target.h"
#include <cmath>
#include "../Engine/Language.h"
namespace OpenXcom
{
/**
* Initializes a target with blank coordinates.
*/
Target::Target() : _lon(0.0), _lat(0.0), _followers()
{
}
Target::~Target()
{
}
/**
* Loads the target from a YAML file.
* @param node YAML node.
*/
void Target::load(const YAML::Node &node)
{
node["lon"] >> _lon;
node["lat"] >> _lat;
}
/**
* Saves the target to a YAML file.
* @param out YAML emitter.
*/
void Target::save(YAML::Emitter &out) const
{
out << YAML::BeginMap;
out << YAML::Key << "lon" << YAML::Value << _lon;
out << YAML::Key << "lat" << YAML::Value << _lat;
}
/**
* Saves the target's unique identifiers to a YAML file.
* @param out YAML emitter.
*/
void Target::saveId(YAML::Emitter &out) const
{
out << YAML::BeginMap;
out << YAML::Key << "lon" << YAML::Value << _lon;
out << YAML::Key << "lat" << YAML::Value << _lat;
}
/**
* Returns the longitude coordinate of the target.
* @return Longitude in radian.
*/
double Target::getLongitude() const
{
return _lon;
}
/**
* Changes the longitude coordinate of the target.
* @param lon Longitude in radian.
*/
void Target::setLongitude(double lon)
{
_lon = lon;
// Keep between 0 and 2xPI
while (_lon < 0)
_lon += 2 * M_PI;
while (_lon >= 2 * M_PI)
_lon -= 2 * M_PI;
}
/**
* Returns the latitude coordinate of the target.
* @return Latitude in radian.
*/
double Target::getLatitude() const
{
return _lat;
}
/**
* Changes the latitude coordinate of the target.
* @param lat Latitude in radian.
*/
void Target::setLatitude(double lat)
{
_lat = lat;
// Keep between -PI and PI
while (_lat < -M_PI)
{
_lat = 2*M_PI - _lat;
setLongitude(_lon + M_PI);
}
while (_lat > M_PI)
{
_lat = -2*M_PI + _lat;
setLongitude(_lon - M_PI);
}
}
/**
* Returns the list of crafts currently
* following this target.
* @return Pointer to list of crafts.
*/
std::vector<Target*> *Target::getFollowers()
{
return &_followers;
}
/**
* Returns the great circle distance to another
* target on the globe.
* @param target Pointer to other target.
* @returns Distance in radian.
*/
double Target::getDistance(Target *target) const
{
return acos(cos(_lat) * cos(target->getLatitude()) * cos(target->getLongitude() - _lon) + sin(_lat) * sin(target->getLatitude()));
}
}