78 lines
1.5 KiB
C++
78 lines
1.5 KiB
C++
//
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// Created by Иван Ильин on 10.10.2021.
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//
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#include <cmath>
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#include "Vec2D.h"
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#include "../Consts.h"
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Vec2D::Vec2D(const Vec2D &vec) {
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_arr_point[0] = vec.x();
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_arr_point[1] = vec.y();
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}
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Vec2D::Vec2D(double x, double y) {
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_arr_point[0] = x;
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_arr_point[1] = y;
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}
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Vec2D::Vec2D(const Vec4D &point4D) {
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_arr_point[0] = point4D.x();
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_arr_point[1] = point4D.y();
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}
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Vec2D Vec2D::operator-() const {
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return Vec2D(-x(), -y());
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}
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bool Vec2D::operator==(const Vec2D &vec) const {
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return (*this - vec).sqrAbs() < Consts::EPS;
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}
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bool Vec2D::operator!=(const Vec2D &vec) const {
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return !(*this == vec);
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}
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Vec2D Vec2D::operator+(const Vec2D &vec) const {
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return Vec2D(x() + vec.x(), y() + vec.y());
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}
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Vec2D Vec2D::operator-(const Vec2D &vec) const {
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return *this + -vec;
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}
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Vec2D Vec2D::operator*(double number) const {
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return Vec2D(x() * number, y() * number);
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}
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Vec2D Vec2D::operator/(double number) const {
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if (std::abs(number) > Consts::EPS) {
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return *this * (1.0 / number);
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} else {
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throw std::domain_error{"Vec2D::operator/(double number): division by zero"};
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}
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}
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// Other useful methods
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double Vec2D::sqrAbs() const {
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return x() * x() + y() * y();
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}
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double Vec2D::abs() const {
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return sqrt(sqrAbs());
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}
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Vec2D Vec2D::normalized() const {
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double vecAbs = sqrAbs();
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if (vecAbs > Consts::EPS) {
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return *this / sqrt(vecAbs);
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} else {
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return Vec2D(0);
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}
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}
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double Vec2D::dot(const Vec2D &vec) const {
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return vec.x() * x() + vec.y() * y();
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}
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