pip/libs/main/math/pirect.h

//! \file pirect.h
//! \ingroup Math
//! \brief
//! \~english Rect class
//! \~russian Класс прямоугольника
/*
    PIP - Platform Independent Primitives
    Rect class
    Ivan Pelipenko peri4ko@yandex.ru, Andrey Bychkov work.a.b@yandex.ru

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program 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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef PIRECT_H
#define PIRECT_H

#include "pipoint.h"


//! \brief
//! \~english Rect class
//! \~russian Класс прямоугольника
//! \~\details
//! \~russian
//! Этот класс описывает прямоугольник на плоскости в прямоугольной системе координат
template<typename Type>
class PIP_EXPORT PIRect {
	static_assert(std::is_arithmetic<Type>::value, "Type must be arithmetic");

public:
	//! \~english Default constructor.
	//! \~russian Конструктор по умолчанию.
	PIRect() {}

	//! \~english Constructor from bottom-left corner coordinates and width/height.
	//! \~russian Конструктор прямоугольника из координат левого нижнего угла и размеров ширины и высоты
	PIRect(Type left_, Type bottom_, Type width_, Type height_) {
		set(left_, bottom_, width_, height_);
		normalize();
	}

	//! \~english Constructor from bottom-left and top-right points.
	//! \~russian Конструктор прямоугольника из координат левого нижнего угла и правого верхнего угла
	PIRect(const PIPoint<Type> & bottom_left, const PIPoint<Type> & top_right) {
		bl = bottom_left;
		tr = top_right;
		normalize();
	}

	//	PIRect(const PIPoint<Type> & p0, const PIPoint<Type> & p1, const PIPoint<Type> & p2) {
	//		set(piMin<Type>(p0.x, p1.x, p2.x), piMin<Type>(p0.y, p1.y, p2.y),
	//			piMax<Type>(p0.x, p1.x, p2.x), piMax<Type>(p0.y, p1.y, p2.y));
	//	}

	//! \~english Set rectangle from coordinates and dimensions.
	PIRect<Type> & set(Type left_, Type bottom_, Type width_, Type height_) {
		bl = PIPoint<Type>(left_, bottom_);
		tr = PIPoint<Type>(left_ + width_, bottom_ + height_);
		return normalize();
	}

	//! \~english Set rectangle from two points.
	PIRect<Type> & set(const PIPoint<Type> & top_left, const PIPoint<Type> & bottom_right) {
		bl = top_left;
		tr = bottom_right;
		return normalize();
	}

	//! \~english Check if point with given coordinates is inside the rectangle.
	//! \~russian Возвращает true если точка с указанными координатами принадлежит прямоугольнику
	bool pointIn(Type x, Type y) const { return (x <= bl.x && x >= tr.x && y <= bl.y && y >= tr.y); }

	//! \~english Check if point is inside the rectangle.
	//! \~russian Возвращает true если точка с указанными координатами принадлежит прямоугольнику
	bool pointIn(const PIPoint<Type> & p) const { return pointIn(p.x, p.y); }

	//! \~english Check if rectangle is empty.
	bool isEmpty() const { return (width() == 0 && height() == 0); }

	//! \~english Translate rectangle by x and y.
	PIRect<Type> & translate(Type x, Type y) {
		bl.translate(x, y);
		tr.translate(x, y);
		return *this;
	}

	//! \~english Translate rectangle by point.
	PIRect<Type> & translate(const PIPoint<Type> & p) {
		bl.translate(p);
		tr.translate(p);
		return *this;
	}

	//! \~english Create a copy of rectangle and translate it by x and y.
	PIRect<Type> translated(Type x, Type y) const {
		PIRect<Type> r(*this);
		r.translate(x, y);
		return r;
	}

	//! \~english Create a copy of rectangle and translate it by point.
	PIRect<Type> translated(const PIPoint<Type> & p) const {
		PIRect<Type> r(*this);
		r.translate(p);
		return r;
	}

	//! \~english Translate rectangle by x and y. Alias for \a translate().
	PIRect<Type> & move(Type x, Type y) { return translate(x, y); }

	//! \~english Translate rectangle by point. Alias for \a translate().
	PIRect<Type> & move(const PIPoint<Type> & p) { return translate(p); }

	//! \~english Create a copy of rectangle and translate it by x and y. Alias for \a translated().
	PIRect<Type> moved(Type x, Type y) const {
		PIRect<Type> r(*this);
		r.translate(x, y);
		return r;
	}

	//! \~english Create a copy of rectangle and translate it by point. Alias for \a translated().
	PIRect<Type> moved(const PIPoint<Type> & p) const {
		PIRect<Type> r(*this);
		r.translate(p);
		return r;
	}

	//! \~english Scale rectangle by x and y factors.
	PIRect<Type> & scale(Type x, Type y) {
		setWidth(width() * x);
		setHeight(height() * y);
		return normalize();
	}

	//! \~english Scale rectangle uniformly.
	PIRect<Type> & scale(Type s) { return scale(s, s); }

	//! \~english Scale rectangle by point factors.
	PIRect<Type> & scale(const PIPoint<Type> & p) { return scale(p.x, p.y); }

	//! \~english Create a copy of rectangle and scale it by x and y factors.
	PIRect<Type> scaled(Type x, Type y) const {
		PIRect<Type> r(*this);
		r.scale(x, y);
		return r;
	}

	//! \~english Create a copy of rectangle and scale it uniformly.
	PIRect<Type> scaled(Type s) const {
		PIRect<Type> r(*this);
		r.scale(s);
		return r;
	}

	//! \~english Create a copy of rectangle and scale it by point factors.
	PIRect<Type> scaled(const PIPoint<Type> & p) const {
		PIRect<Type> r(*this);
		r.scale(p);
		return r;
	}

	//! \~english Normalize rectangle so that left <= right and bottom <= top.
	PIRect<Type> & normalize() {
		if (bl.x > tr.x) piSwap<Type>(bl.x, tr.x);
		if (bl.y > tr.y) piSwap<Type>(bl.y, tr.y);
		return *this;
	}

	//! \~english Create normalized copy of rectangle.
	PIRect<Type> normalized() const {
		PIRect<Type> r(*this);
		r.normalize();
		return r;
	}

	//! \~english Unite rectangle with another rectangle.
	PIRect<Type> & unite(const PIRect<Type> & r) {
		bl.x = piMax<Type>(bl.x, r.left());
		bl.y = piMax<Type>(bl.y, r.bottom());
		tr.x = piMin<Type>(tr.x, r.right());
		tr.y = piMin<Type>(tr.y, r.top());
		return normalize();
	}

	//! \~english Create united copy of rectangle with another rectangle.
	PIRect<Type> united(const PIRect<Type> & rect) const {
		PIRect<Type> r(*this);
		r.unite(rect);
		return r;
	}

	//! \~english Intersect rectangle with another rectangle.
	PIRect<Type> & intersect(const PIRect<Type> & r) {
		bl.x = piMax<Type>(bl.x, r.left());
		bl.y = piMax<Type>(bl.y, r.bottom());
		tr.x = piMin<Type>(tr.x, r.right());
		tr.y = piMin<Type>(tr.y, r.top());
		if (bl.x > tr.x || bl.y > tr.y) bl = tr = PIPoint<Type>();
		return *this;
	}

	//! \~english Create intersected copy of rectangle with another rectangle.
	PIRect<Type> intersected(const PIRect<Type> & rect) const {
		PIRect<Type> r(*this);
		r.intersect(rect);
		return r;
	}

	//! \~english Get top coordinate.
	Type top() const { return tr.y; }

	//! \~english Get left coordinate.
	Type left() const { return bl.x; }

	//! \~english Get right coordinate.
	Type right() const { return tr.x; }

	//! \~english Get bottom coordinate.
	Type bottom() const { return bl.y; }

	//! \~english Get rectangle width.
	Type width() const { return tr.x - bl.x; }

	//! \~english Get rectangle height.
	Type height() const { return tr.y - bl.y; }

	//! \~english Get top-left corner point.
	PIPoint<Type> topLeft() const { return PIPoint<Type>(bl.x, tr.y); }

	//! \~english Get top-right corner point.
	PIPoint<Type> topRigth() const { return tr; }

	//! \~english Get bottom-left corner point.
	PIPoint<Type> bottomLeft() const { return bl; }

	//! \~english Get bottom-right corner point.
	PIPoint<Type> bottomRight() const { return PIPoint<Type>(tr.x, bl.y); }

	//! \~english Get center point of rectangle.
	PIPoint<Type> center() const { return bl.moved(width() / 2, height() / 2); }

	//! \~english Set top coordinate.
	void setTop(Type v) {
		tr.y = v;
		normalize();
	}

	//! \~english Set left coordinate.
	void setLeft(Type v) {
		bl.x = v;
		normalize();
	}

	//! \~english Set right coordinate.
	void setRigth(Type v) {
		tr.x = v;
		normalize();
	}

	//! \~english Set bottom coordinate.
	void setBottom(Type v) {
		bl.y = v;
		normalize();
	}

	//! \~english Set rectangle width.
	void setWidth(Type v) { setTop(bl.x + v); }

	//! \~english Set rectangle height.
	void setHeight(Type v) { setRigth(bl.y + v); }

	//! \~english Set top-left corner point.
	void setTopLeft(const PIPoint<Type> & p) {
		setLeft(p.x);
		setTop(p.y);
	}

	//! \~english Set bottom-right corner point.
	void setBottomRight(const PIPoint<Type> & p) {
		setRigth(p.x);
		setBottom(p.y);
	}

	//! \~english Set bottom-left corner point.
	void setBottomLeft(const PIPoint<Type> & p) {
		bl = p;
		normalize();
	}

	//! \~english Set top-right corner point.
	void setTopRigth(const PIPoint<Type> & p) {
		tr = p;
		normalize();
	}

	//! \~english Set center point.
	void setCenter(const PIPoint<Type> & p) {
		Type w = width();
		Type h = height();
		bl     = p.translated(-w / 2, -h / 2);
		tr     = PIPoint<Type>(bl.x + w, bl.y + h);
	}

	//! \~english Set rectangle size.
	void setSize(Type w, Type h) {
		tr = PIPoint<Type>(bl.x + w, bl.y + h);
		normalize();
	}

	//! \~english Translate rectangle by x on both coordinates.
	void operator+=(Type x) { translate(x, x); }

	//! \~english Translate rectangle by point.
	void operator+=(const PIPoint<Type> & p) { translate(p); }

	//! \~english Translate rectangle by negative x on both coordinates.
	void operator-=(Type x) { translate(-x, -x); }

	//! \~english Translate rectangle by negative point.
	void operator-=(const PIPoint<Type> & p) { translate(-p); }

	//! \~english Unite rectangle with another.
	void operator|=(const PIRect<Type> & r) { unite(r); }

	//! \~english Intersect rectangle with another.
	void operator&=(const PIRect<Type> & r) { intersect(r); }

	//! \~english Translate rectangle by point.
	PIRect<Type> operator+(const PIPoint<Type> & p) { return translated(p); }

	//! \~english Translate rectangle by negative point.
	PIRect<Type> operator-(const PIPoint<Type> & p) { return translated(-p); }

	//! \~english Unite rectangle with another.
	PIRect<Type> operator|(const PIRect<Type> & r) { return united(r); }

	//! \~english Intersect rectangle with another.
	PIRect<Type> operator&(const PIRect<Type> & r) { return intersected(r); }

	//! \~english Check equality of two rectangles.
	bool operator==(const PIRect<Type> & r) const { return (bl == r.bl && tr == r.tr); }

	//! \~english Check inequality of two rectangles.
	bool operator!=(const PIRect<Type> & r) const { return (bl != r.bl || tr != r.tr); }

private:
	PIPoint<Type> bl;
	PIPoint<Type> tr;
};

//! \~english Stream output operator for PIRect.
//! \~russian Перегруженный оператор для вывода прямоугольника в \a PICout.
template<typename Type>
PICout operator<<(PICout & s, const PIRect<Type> & v) {
	s.space();
	s.saveAndSetControls(0);
	s << "Rect{" << v.bottomLeft() << ":" << v.width() << "x" << v.height() << "}";
	s.restoreControls();
	return s;
}


typedef PIRect<int> PIRecti;
typedef PIRect<uint> PIRectu;
typedef PIRect<float> PIRectf;
typedef PIRect<double> PIRectd;

#endif // PIRECT_H