97 lines
2.1 KiB
C++
97 lines
2.1 KiB
C++
//
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// Created by Иван Ильин on 09.10.2021.
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//
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#include <cmath>
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#include <stdexcept>
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#include "Vec3D.h"
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#include "Consts.h"
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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 Vec4D &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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}
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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(1);
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}
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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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Vec4D Vec3D::makePoint4D() const {
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return Vec4D(x(), y(), z(), 1.0);
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}
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Vec3D Vec3D::Random() {
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return Vec3D((double) rand() / RAND_MAX, (double) rand() / RAND_MAX, (double) rand() / RAND_MAX);
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}
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