/*
* Copyright 2011 Steven Gribble
*
* This file is the solution to an exercise problem posed during
* one of the UW CSE 333 lectures (333exercises).
*
* 333exercises is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 333exercises is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with 333exercises. If not, see .
*/
// lec 10 exercise 1
#include "ThreeDPoint.h"
using namespace std;
// Copy constructor.
ThreeDPoint::ThreeDPoint(const ThreeDPoint &pt) {
x_ = pt.x_;
y_ = pt.y_;
z_ = pt.z_;
}
// Inner product.
double ThreeDPoint::InnerProduct(const ThreeDPoint &pt) const {
double retval = 0.0;
retval += (x_ * pt.x_);
retval += (y_ * pt.y_);
retval += (z_ * pt.z_);
return retval;
}
// Arithmetic operators.
ThreeDPoint ThreeDPoint::operator+(const ThreeDPoint &pt) const {
ThreeDPoint retval(*this); // Uses our copy constructor!
retval.x_ += pt.x_;
retval.y_ += pt.y_;
retval.z_ += pt.z_;
return retval;
}
ThreeDPoint ThreeDPoint::operator-(const ThreeDPoint &pt) const {
ThreeDPoint retval(*this); // Uses our copy constructor!
retval.x_ -= pt.x_;
retval.y_ -= pt.y_;
retval.z_ -= pt.z_;
return retval;
}
// Arithmetic + assign operators.
ThreeDPoint &ThreeDPoint::operator+=(const ThreeDPoint &pt) {
x_ += pt.x_;
y_ += pt.y_;
z_ += pt.z_;
return *this;
}
ThreeDPoint &ThreeDPoint::operator-=(const ThreeDPoint &pt) {
x_ -= pt.x_;
y_ -= pt.y_;
z_ -= pt.z_;
return *this;
}
// Assignment operator.
ThreeDPoint &ThreeDPoint::operator=(const ThreeDPoint &pt) {
if (this != &pt) {
x_ = pt.x_;
y_ = pt.y_;
z_ = pt.z_;
}
return *this;
}
// Override "<<" for std::ostream. Note that this is not
// a member function of ThreeDPoint, but a global non-member function.
// The "friend" is there so we can directly access pt's x_, y_, z_
// privates.
ostream &operator<<(ostream &out, const ThreeDPoint &pt) {
out << "(" << pt.x_ << "," << pt.y_ << "," << pt.z_ << ")";
return out;
}