Graphics_Project2/vector.cpp at main · Anatole-JDM/Graphics_Project2 · GitHub

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#include "vector.h"
#include <vector>
#include <algorithm>
#include <cmath>

// Vector implementation
Vector::Vector(double x, double y, double z) {
    data[0] = x;
    data[1] = y;
    data[2] = z;
}

double Vector::norm2() const {
    return data[0] * data[0] + data[1] * data[1] + data[2] * data[2];
}

double Vector::norm() const {
    return sqrt(norm2());
}

void Vector::normalize() {
    double n = norm();
    data[0] /= n;
    data[1] /= n;
    data[2] /= n;
}

double Vector::operator[](int i) const {
    return data[i];
}

double& Vector::operator[](int i) {
    return data[i];
}

Vector Vector::operator-() const {
    return Vector(-data[0], -data[1], -data[2]);
}

Vector& Vector::operator+=(const Vector& other) {
    data[0] += other[0];
    data[1] += other[1];
    data[2] += other[2];
    return *this;
}


// Vector operators
Vector operator+(const Vector& a, const Vector& b) {
    return Vector(a[0] + b[0], a[1] + b[1], a[2] + b[2]);
}

Vector operator-(const Vector& a, const Vector& b) {
    return Vector(a[0] - b[0], a[1] - b[1], a[2] - b[2]);
}

Vector operator*(const double a, const Vector& b) {
    return Vector(a*b[0], a*b[1], a*b[2]);
}

Vector operator*(const Vector& a, const double b) {
    return Vector(a[0]*b, a[1]*b, a[2]*b);
}

Vector operator*(const Vector& a, const Vector& b) {
    return Vector(a[0] * b[0], a[1] * b[1], a[2] * b[2]);
}

Vector operator/(const Vector& a, const double b) {
    return Vector(a[0] / b, a[1] / b, a[2] / b);
}

double dot(const Vector& a, const Vector& b) {
    return a[0] * b[0] + a[1] * b[1] + a[2] * b[2];
}

Vector cross(const Vector& a, const Vector& b) {
    return Vector(a[1] * b[2] - a[2] * b[1], a[2] * b[0] - a[0] * b[2], a[0] * b[1] - a[1] * b[0]);
}