167 lines
3.3 KiB
C++
167 lines
3.3 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 VECTOR_H_
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#define VECTOR_H_
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#include <cmath>
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#include <string>
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#include <sstream>
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#include <iomanip>
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namespace libsgp4
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{
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/**
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* @brief Generic vector
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*
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* Stores x, y, z, w
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*/
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struct Vector
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{
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public:
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/**
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* Default constructor
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*/
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Vector()
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: x(0.0), y(0.0), z(0.0), w(0.0)
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{
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}
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/**
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* Constructor
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* @param arg_x x value
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* @param arg_y y value
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* @param arg_z z value
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*/
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Vector(const double arg_x,
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const double arg_y,
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const double arg_z)
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: x(arg_x), y(arg_y), z(arg_z), w(0.0)
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{
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}
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/**
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* Constructor
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* @param arg_x x value
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* @param arg_y y value
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* @param arg_z z value
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* @param arg_w w value
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*/
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Vector(const double arg_x,
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const double arg_y,
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const double arg_z,
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const double arg_w)
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: x(arg_x), y(arg_y), z(arg_z), w(arg_w)
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{
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}
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/**
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* Copy constructor
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* @param v value to copy from
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*/
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Vector(const Vector& v)
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{
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x = v.x;
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y = v.y;
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z = v.z;
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w = v.w;
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}
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/**
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* Assignment operator
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* @param v value to copy from
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*/
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Vector& operator=(const Vector& v)
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{
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if (this != &v)
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{
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x = v.x;
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y = v.y;
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z = v.z;
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w = v.w;
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}
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return *this;
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}
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/**
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* Subtract operator
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* @param v value to suctract from
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*/
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Vector operator-(const Vector& v)
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{
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return Vector(x - v.x,
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y - v.y,
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z - v.z,
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0.0);
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}
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/**
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* Calculates the magnitude of the vector
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* @returns magnitude of the vector
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*/
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double Magnitude() const
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{
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return sqrt(x * x + y * y + z * z);
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}
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/**
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* Calculates the dot product
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* @returns dot product
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*/
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double Dot(const Vector& vec) const
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{
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return (x * vec.x) +
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(y * vec.y) +
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(z * vec.z);
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}
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/**
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* Converts this vector to a string
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* @returns this vector as a string
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*/
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std::string ToString() const
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{
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std::stringstream ss;
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ss << std::right << std::fixed << std::setprecision(3);
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ss << "X: " << std::setw(9) << x;
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ss << ", Y: " << std::setw(9) << y;
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ss << ", Z: " << std::setw(9) << z;
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ss << ", W: " << std::setw(9) << w;
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return ss.str();
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}
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/** x value */
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double x;
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/** y value */
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double y;
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/** z value */
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double z;
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/** w value */
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double w;
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};
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inline std::ostream& operator<<(std::ostream& strm, const Vector& v)
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{
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return strm << v.ToString();
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}
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} // namespace libsgp4
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#endif
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