vector.cpp

#include "vector.hpp"
#include <cmath>

namespace geometry 
{
  Vector::Vector(): x(0.0), y(0.0), z(0.0) {} // member initializer list
  Vector::Vector(double x_, double y_, double z_) : x(x_), y(y_), z(z_) {}

  Vector Vector::plus(const Vector& o) const 
  {
    return Vector(x + o.x, y + o.y, z + o.z);
  }

  Vector Vector::minus(const Vector& o) const 
  {
    return Vector(x - o.x, y - o.y, z - o.z);
  }

  Vector Vector::times(double s) const 
  {
    return Vector(x * s, y * s, z * s);
  }

  double Vector::times(const Vector& o) const
  {
    return x * o.x + y * o.y + z * o.z; 
  }

  double Vector::dot(const Vector& o) const 
  {
    return times(o);
  }

  double Vector::length() const 
  {
    return std::sqrt(x*x + y*y + z*z);
  }

  double Vector::magnitude() const 
  {
    return length();
  }

  Vector Vector::cross(const Vector& o) const
  {
    return Vector (y * o.z - z * o.y, z * o.x - x * o.z, x * o.y - y * o.x); 
  }

  void Vector::print(std::ostream& os) const
  {
    os << "(" << x << ", " << y << ", " << z << ")";  // "(1, 2.5, -3.14)"
  }
}