87 lines
1.9 KiB
C++
87 lines
1.9 KiB
C++
//
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// Created by Иван Ильин on 09.10.2021.
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//
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#include "Vec3D.h"
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#include <cmath>
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#include <stdexcept>
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Vec3D::Vec3D(const Vec3D &vec) {
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_arr_point[0] = vec.x();
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_arr_point[1] = vec.y();
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_arr_point[2] = vec.z();
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}
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Vec3D::Vec3D (const Point4D& point4D) {
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_arr_point[0] = point4D.x();
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_arr_point[1] = point4D.y();
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_arr_point[2] = point4D.z();
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}
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Vec3D::Vec3D (double x, double y, double z) {
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_arr_point[0] = x;
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_arr_point[1] = y;
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_arr_point[2] = z;
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}
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Vec3D Vec3D::operator-() const {
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return Vec3D(-x(), -y(), -z());
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}
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bool Vec3D::operator==(const Vec3D& vec) const {
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return (*this - vec).sqrAbs() < Consts::EPS;
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}
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bool Vec3D::operator!=(const Vec3D& vec) const {
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return !(*this == vec);
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}
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// Operations with Vec3D
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Vec3D Vec3D::operator+(const Vec3D& vec) const {
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return Vec3D(x()+vec.x(), y()+vec.y(), z()+vec.z());
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}
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Vec3D Vec3D::operator-(const Vec3D& vec) const {
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return Vec3D(*this) + -vec;
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}
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Vec3D Vec3D::operator*(double number) const {
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return Vec3D(x()*number, y()*number, z()*number);
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}
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Vec3D Vec3D::operator/(double number) const {
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if(std::abs(number) > Consts::EPS)
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return Vec3D(*this)*(1.0/number);
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else
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throw std::domain_error{"Vec3D::operator/(double number): division by zero"};
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}
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// Other useful methods
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double Vec3D::sqrAbs() const {
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return x()*x() + y()*y() + z()*z();
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}
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double Vec3D::abs() const {
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return sqrt(sqrAbs());
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}
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Vec3D Vec3D::normalized() const {
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double vecAbs = abs();
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if(vecAbs > Consts::EPS)
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return Vec3D(*this)/abs();
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else
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return Vec3D(0);
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}
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double Vec3D::dot(const Vec3D& vec) const {
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return vec.x() * x() + vec.y() * y() + vec.z() * z();
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}
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Vec3D Vec3D::cross(const Vec3D& vec) const {
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return Vec3D{y() * vec.z() - vec.y() * z(),
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z() * vec.x() - vec.z() * x(),
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x() * vec.y() - vec.x() * y()};
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}
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Point4D Vec3D::makePoint4D() const {
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return Point4D(x(), y(), z(), 1.0);
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}
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