150 lines
3.2 KiB
C++
150 lines
3.2 KiB
C++
/*
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* Copyright 2013 Daniel Warner <contact@danrw.com>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ECI_H_
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#define ECI_H_
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#include "CoordGeodetic.h"
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#include "Vector.h"
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#include "DateTime.h"
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namespace libsgp4
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{
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/**
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* @brief Stores an Earth-centered inertial position for a particular time.
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*/
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class Eci
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{
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public:
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/**
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* @param[in] dt the date to be used for this position
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* @param[in] latitude the latitude in degrees
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* @param[in] longitude the longitude in degrees
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* @param[in] altitude the altitude in kilometers
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*/
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Eci(const DateTime& dt,
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const double latitude,
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const double longitude,
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const double altitude)
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{
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ToEci(dt, CoordGeodetic(latitude, longitude, altitude));
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}
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/**
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* @param[in] dt the date to be used for this position
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* @param[in] geo the position
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*/
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Eci(const DateTime& dt, const CoordGeodetic& geo)
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{
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ToEci(dt, geo);
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}
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/**
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* @param[in] dt the date to be used for this position
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* @param[in] position the position
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*/
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Eci(const DateTime &dt, const Vector &position)
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: m_dt(dt)
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, m_position(position)
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{
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}
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/**
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* @param[in] dt the date to be used for this position
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* @param[in] position the position
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* @param[in] velocity the velocity
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*/
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Eci(const DateTime &dt, const Vector &position, const Vector &velocity)
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: m_dt(dt)
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, m_position(position)
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, m_velocity(velocity)
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{
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}
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/**
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* Equality operator
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* @param dt the date to compare
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* @returns true if the object matches
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*/
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bool operator==(const DateTime& dt) const
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{
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return m_dt == dt;
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}
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/**
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* Inequality operator
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* @param dt the date to compare
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* @returns true if the object doesn't match
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*/
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bool operator!=(const DateTime& dt) const
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{
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return m_dt != dt;
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}
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/**
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* Update this object with a new date and geodetic position
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* @param dt new date
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* @param geo new geodetic position
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*/
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void Update(const DateTime& dt, const CoordGeodetic& geo)
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{
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ToEci(dt, geo);
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}
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/**
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* @returns the position
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*/
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Vector Position() const
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{
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return m_position;
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}
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/**
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* @returns the velocity
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*/
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Vector Velocity() const
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{
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return m_velocity;
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}
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/**
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* @returns the date
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*/
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DateTime GetDateTime() const
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{
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return m_dt;
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}
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/**
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* @returns the position in geodetic form
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*/
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CoordGeodetic ToGeodetic() const;
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private:
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void ToEci(const DateTime& dt, const CoordGeodetic& geo);
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DateTime m_dt;
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Vector m_position;
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Vector m_velocity;
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};
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} // namespace libsgp4
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#endif
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