rect.h

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/* === S Y N F I G ========================================================= */
/* ========================================================================= */

/* === S T A R T =========================================================== */

#ifndef __SYNFIG_RECT_H
#define __SYNFIG_RECT_H

/* === H E A D E R S ======================================================= */

#include <ETL/rect>
#include "real.h"
#include "vector.h"
#include <limits>
#include <cmath>

/* === M A C R O S ========================================================= */

/* === T Y P E D E F S ===================================================== */

/* === C L A S S E S & S T R U C T S ======================================= */

namespace synfig {

class Rect : public etl::rect<Real>
{
public:

    using etl::rect<Real>::set_point;
    using etl::rect<Real>::expand;
    using etl::rect<Real>::set;

    static Rect full_plane();

    static Rect horizontal_strip(const value_type &y1, const value_type &y2);
    static Rect vertical_strip(const value_type &x1, const value_type &x2);

    static Rect zero()
    {
        return Rect(
            0,
            0,
            0,
            0
        );
    }

    static Rect infinite()
    {
        return Rect(
            -INFINITY,
            -INFINITY,
            INFINITY,
            INFINITY
        );
    }

    Rect() { }

    Rect(const Point& x) { set_point(x); }

    Rect(const Point& min, const Point& max) { set_point(min); expand(max); }

    Rect(const value_type &x1,const value_type &y1) { set_point(x1,y1); }

    Rect(const value_type &x1,const value_type &y1,
            const value_type &x2,const value_type &y2)
    {
        set_point(x1,y1);
        expand(x2,y2);
    }

    void set_point(const Point& max) { set_point(max[0],max[1]);    }

    Rect& expand(const Point& max) { expand(max[0],max[1]); return *this; }

    Rect& expand(const Real& r) { minx-=r; miny-=r; maxx+=r; maxy+=r; return *this; }

    Rect& expand_x(const Real& r) { minx-=r; maxx+=r; return *this; }

    Rect& expand_y(const Real& r) { miny-=r; maxy+=r; return *this; }

    Rect& set(const Point& min,const Point& max) { set(min[0],min[1],max[0],max[1]); return *this; }

    Point get_min()const { return Point(minx,miny); }
    Point get_max()const { return Point(maxx,maxy); }

    bool is_inside(const Point& x) { return x[0]>minx && x[0]<maxx && x[1]>miny && x[1]<maxy; }

    Real area()const
    {
        return (maxx-minx)*(maxy-miny);
    }

    // Operators

    Rect& operator+=(const Vector& rhs)
    {
        minx+=rhs[0]; miny+=rhs[1];
        maxx+=rhs[0]; maxy+=rhs[1];
        return *this;
    }

    Rect& operator-=(const Vector& rhs)
    {
        minx-=rhs[0]; miny-=rhs[1];
        maxx-=rhs[0]; maxy-=rhs[1];
        return *this;
    }

    Rect& operator*=(const Real& rhs)
    {
        minx*=rhs; miny*=rhs;
        maxx*=rhs; maxy*=rhs;
        return *this;
    }

    Rect& operator/=(Real rhs)
    {
        rhs=1.0/rhs; // Avoid doing several divisions
        minx*=rhs; miny*=rhs;
        maxx*=rhs; maxy*=rhs;
        return *this;
    }

    Rect& operator&=(const Rect& rhs)
    {
        if(rhs.area()>0.00000001 && area()>0.00000001)
            etl::set_intersect(*this,*this,rhs);
        else
            *this=zero();
        return *this;
    }

    Rect& operator|=(const Rect& rhs)
    {
        if(rhs.area()>0.00000001 && area()>0.00000001)
            etl::set_union(*this,*this,rhs);
        else
        {
            if(area()<rhs.area())
                *this=rhs;
        }
        return *this;
    }

    Rect operator+(const Vector& rhs)const { return Rect(*this)+=rhs; }

    Rect operator-(const Vector& rhs)const { return Rect(*this)-=rhs; }

    Rect operator*(const Real& rhs)const { return Rect(*this)*=rhs; }

    Rect operator/(const Real& rhs)const { return Rect(*this)/=rhs; }

    Rect operator&(const Rect& rhs)const { return Rect(*this)&=rhs; }

    Rect operator|(const Rect& rhs)const { return Rect(*this)|=rhs; }

    bool operator&&(const Rect& rhs)const { return etl::intersect(*this, rhs); }

    bool operator==(const Rect &rhs)const { return get_min() == rhs.get_min() && get_max() == rhs.get_max(); }

    bool operator!=(const Rect &rhs)const { return get_min() != rhs.get_min() || get_max() != rhs.get_max(); }

    bool is_valid()const { return valid(); }

    Rect multiply_coords(const Vector &rhs) const
        { return Rect(minx*rhs[0], miny*rhs[1], maxx*rhs[0], maxy*rhs[1]); }
    Rect divide_coords(const Vector &rhs) const
        { return Rect(minx/rhs[0], miny/rhs[1], maxx/rhs[0], maxy/rhs[1]); }
}; // END of class Rect

}; // END of namespace synfig

/* === E N D =============================================================== */

#endif