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/* Rectangle.h
Copyright (c) 2016 by Michael Zahniser
Endless Sky 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.
Endless Sky 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
this program. If not, see <https://www.gnu.org/licenses/>.
*/
#pragma once
#include "Point.h"
// Class representing a rectangle.
class Rectangle {
public:
// Construct a rectangle by specifying the two corners rather than the
// center and the dimensions. The two corners need not be in any order.
static Rectangle WithCorners(const Point &from, const Point &to);
// Construct a rectangle beginning at the given point and having the given
// dimensions (which are allowed to be negative).
static Rectangle FromCorner(const Point &corner, const Point &dimensions);
// Default constructor.
Rectangle() = default;
// Constructor, specifying the center and the dimensions.
Rectangle(const Point ¢er, const Point &dimensions);
// Copy constructor.
Rectangle(const Rectangle &other) = default;
// Assignment operator.
Rectangle &operator=(const Rectangle &other) = default;
// Translation operators.
Rectangle operator+(const Point &offset) const;
Rectangle &operator+=(const Point &offset);
Rectangle operator-(const Point &offset) const;
Rectangle &operator-=(const Point &offset);
// Query the attributes of the rectangle.
Point Center() const;
Point Dimensions() const;
double Width() const;
double Height() const;
double Left() const;
double Top() const;
double Right() const;
double Bottom() const;
Point TopLeft() const;
Point TopRight() const;
Point BottomLeft() const;
Point BottomRight() const;
// Check if a point is inside this rectangle.
bool Contains(const Point &point) const;
// Check if the given rectangle is inside this one. If one of its edges is
// touching the edge of this one, that still counts.
bool Contains(const Rectangle &other) const;
// Check if the given rectangle overlaps with this one.
bool Overlaps(const Rectangle &other) const;
// Check if the given circle overlaps with this rectangle.
bool Overlaps(const Point ¢er, double radius) const;
private:
Point center;
Point dimensions;
};
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