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geometry.cc
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geometry.cc
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#include "geometry.h"
#include <cassert>
namespace {
bool can_be_merged_horizontally(const Rectangle &rect1, const Rectangle &rect2) {
return rect1.width() == rect2.width()
&& rect1.pos().x() == rect2.pos().x()
&& rect1.pos().y() + rect1.height() == rect2.pos().y();
}
bool can_be_merged_vertically(const Rectangle &rect1, const Rectangle &rect2) {
return rect1.height() == rect2.height()
&& rect1.pos().y() == rect2.pos().y()
&& rect1.pos().x() + rect1.width() == rect2.pos().x();
}
Rectangle merge_vertically_helper(const Rectangle &rect1, const Rectangle &rect2) {
Vector::coordinate_t new_width = rect1.width() + rect2.width();
Vector::coordinate_t new_height = rect1.height();
return Rectangle(new_width, new_height, rect1.pos());
}
Rectangle merge_horizontally_helper(const Rectangle &rect1, const Rectangle &rect2) {
Vector::coordinate_t new_width = rect1.width();
Vector::coordinate_t new_height = rect1.height() + rect2.height();
return Rectangle(new_width, new_height, rect1.pos());
}
}
Vector::Vector(Vector::coordinate_t x, Vector::coordinate_t y) : _x(x), _y(y) {}
Vector::Vector(const Position &point) : _x(point.x()), _y(point.y()) {}
Vector::coordinate_t Vector::x() const {
return this->_x;
}
Vector::coordinate_t Vector::y() const {
return this->_y;
}
Vector Vector::reflection() const {
return Vector(this->_y, this->_x);
}
bool Vector::operator==(const Vector &other) const {
return this->_x == other._x && this->_y == other._y;
}
Vector &Vector::operator+=(const Vector &other) {
this->_x += other._x;
this->_y += other._y;
return *this;
}
Position::Position(Vector::coordinate_t x, Vector::coordinate_t y) : _vec(x, y) {}
Position::Position(const Vector &vec) : _vec(vec) {}
const Position &Position::origin() {
static Position morigin = Position(0, 0);
return morigin;
}
Vector::coordinate_t Position::x() const {
return this->_vec.x();
}
Vector::coordinate_t Position::y() const {
return this->_vec.y();
}
Position Position::reflection() const {
return Position(this->_vec.reflection());
}
bool Position::operator==(const Position &other) const {
return this->_vec == other._vec;
}
Position &Position::operator+=(const Vector &vector) {
this->_vec += vector;
return *this;
}
Rectangle::Rectangle(Vector::coordinate_t width, Vector::coordinate_t height, const Position &pos) : _width(width),
_height(height),
_left_bottom_corner(
pos) {
assert(width > 0 && height > 0);
}
bool Rectangle::operator==(const Rectangle &rect) const {
return this->_left_bottom_corner == rect._left_bottom_corner
&& this->width() == rect.width()
&& this->height() == rect.height();
}
const Position &Rectangle::pos() const {
return this->_left_bottom_corner;
}
Vector::coordinate_t Rectangle::width() const {
return this->_width;
}
Vector::coordinate_t Rectangle::height() const {
return this->_height;
}
Rectangle Rectangle::reflection() const {
return Rectangle(this->height(), this->width(), this->pos().reflection());
}
Rectangle &Rectangle::operator+=(const Vector &vec) {
this->_left_bottom_corner += vec;
return *this;
}
Rectangle::area_t Rectangle::area() const {
return this->width() * this->height();
}
Rectangles::Rectangles(std::initializer_list<Rectangle> rects) : _rects(rects) {}
bool Rectangles::operator==(const Rectangles &rectangles) {
if (this->size() != rectangles.size())
return false;
for (Rectangles::size_t i = 0; i > this->size(); ++i) {
if (!(this->_rects[i] == rectangles._rects[i]))
return false;
}
return true;
}
Rectangles &Rectangles::operator+=(const Vector &vec) {
for (Rectangle &rect:this->_rects) {
rect += vec;
}
return *this;
}
Rectangles::size_t Rectangles::size() const {
return this->_rects.size();
}
const Rectangle &Rectangles::operator[](Rectangles::size_t i) const {
return this->_rects.at(i);
}
Rectangle &Rectangles::operator[](Rectangles::size_t i) {
return this->_rects.at(i);
}
Rectangle merge_vertically(const Rectangle &rect1, const Rectangle &rect2) {
assert(can_be_merged_vertically(rect1, rect2));
return merge_vertically_helper(rect1, rect2);
}
Rectangle merge_horizontally(const Rectangle &rect1, const Rectangle &rect2) {
assert(can_be_merged_horizontally(rect1, rect2));
return merge_horizontally_helper(rect1, rect2);
}
Rectangle merge_all(const Rectangles &rectangles) {
assert(rectangles.size());
Rectangle rect = rectangles[0];
for (Rectangles::size_t i = 1; i < rectangles.size(); ++i) {
const Rectangle &curr = rectangles[i];
if (can_be_merged_horizontally(rect, curr)) {
rect = merge_horizontally_helper(rect, curr);
} else {
rect = merge_vertically(rect, curr);
}
}
return rect;
}
Vector operator+(Vector vec1, const Vector &vec2) {
return vec1 += vec2;
}
Position operator+(Position point, const Vector &vec) {
return point += vec;
}
Position operator+(const Vector &vec, Position point) {
return point += vec;
}
Rectangle operator+(Rectangle rect, const Vector &vec) {
return rect += vec;
}
Rectangle operator+(const Vector &vec, Rectangle rect) {
return rect += vec;
}
Rectangles operator+(const Rectangles &rects, const Vector &vec) {
Rectangles res(rects);
res += vec;
return res;
}
Rectangles operator+(const Vector &vec, const Rectangles &rects) {
return rects + vec;
}
Rectangles operator+(Rectangles &&rects, const Vector &vec) {
Rectangles res(std::move(rects));
res += vec;
return res;
}
Rectangles operator+(const Vector &vec, Rectangles &&rects) {
return std::move(rects) + vec;
}