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/********************************************************************************
* *
* D o u b l e - P r e c i s i o n E x t e n t C l a s s *
* *
*********************************************************************************
* Copyright (C) 2004,2022 by Jeroen van der Zijp. All Rights Reserved. *
*********************************************************************************
* This library 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 library 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 FXEXTENTD_H
#define FXEXTENTD_H
namespace FX {
/// Extent
class FXAPI FXExtentd {
public:
FXVec2d lower;
FXVec2d upper;
public:
/// Default constructor; value is not initialized
FXExtentd(){}
/// Copy constructor
FXExtentd(const FXExtentd& ext):lower(ext.lower),upper(ext.upper){}
/// Initialize with a single point
FXExtentd(const FXVec2d& p):lower(p),upper(p){}
/// Initialize from corner points
FXExtentd(const FXVec2d& lo,const FXVec2d& hi):lower(lo),upper(hi){}
/// Initialize with a single point
FXExtentd(FXdouble x,FXdouble y):lower(x,y),upper(x,y){}
/// Initialize with explicit values
FXExtentd(FXdouble xl,FXdouble xh,FXdouble yl,FXdouble yh):lower(xl,yl),upper(xh,yh){}
/// Assignment
FXExtentd& operator=(const FXExtentd& ext){ lower=ext.lower; upper=ext.upper; return *this; }
/// Set value from another range
FXExtentd& set(const FXExtentd& ext){ lower=ext.lower; upper=ext.upper; return *this; }
/// Set value from single point
FXExtentd& set(const FXVec2d& p){ lower=upper=p; return *this; }
/// Set value from corner points
FXExtentd& set(const FXVec2d& lo,const FXVec2d& hi){ lower=lo; upper=hi; return *this; }
/// Set value from single point
FXExtentd& set(FXdouble x,FXdouble y){ lower.x=upper.x=x; lower.y=upper.y=y; return *this; }
/// Set value from explicit values
FXExtentd& set(FXdouble xl,FXdouble xh,FXdouble yl,FXdouble yh){ lower.set(xl,yl); upper.set(xh,yh); return *this; }
/// Indexing with 0..1
FXVec2d& operator[](FXint i){ return (&lower)[i]; }
/// Indexing with 0..1
const FXVec2d& operator[](FXint i) const { return (&lower)[i]; }
/// Comparison
FXbool operator==(const FXExtentd& ext) const { return lower==ext.lower && upper==ext.upper;}
FXbool operator!=(const FXExtentd& ext) const { return lower!=ext.lower || upper!=ext.upper;}
/// Width of box
FXdouble width() const { return upper.x-lower.x; }
/// Height of box
FXdouble height() const { return upper.y-lower.y; }
/// Area
FXdouble area() const { return width()*height(); }
/// Longest side
FXdouble longest() const;
/// Shortest side
FXdouble shortest() const;
/// Length of diagonal
FXdouble diameter() const;
/// Get radius of box
FXdouble radius() const;
/// Compute diagonal
FXVec2d diagonal() const;
/// Get center of box
FXVec2d center() const;
/// Test if empty
FXbool empty() const;
/// Test if box contains point x,y
FXbool contains(FXdouble x,FXdouble y) const;
/// Test if box contains point p
FXbool contains(const FXVec2d& p) const;
/// Test if box properly contains another box
FXbool contains(const FXExtentd& ext) const;
/// Include point
FXExtentd& include(FXdouble x,FXdouble y);
/// Include point
FXExtentd& include(const FXVec2d& v);
/// Include given range into extent
FXExtentd& include(const FXExtentd& ext);
/// Intersect box with ray u-v
FXbool intersect(const FXVec2d& u,const FXVec2d& v) const;
/// Intersect box with ray pos+lambda*dir, returning true if hit
FXbool intersect(const FXVec2d& pos,const FXVec2d& dir,FXdouble hit[]) const;
/// Get corner number 0..3
FXVec2d corner(FXint c) const { return FXVec2d((&lower)[c&1].x, (&lower)[(c>>1)&1].y); }
/// Destructor
~FXExtentd(){}
};
/// Test if bounds overlap
extern FXAPI FXbool overlap(const FXExtentd& a,const FXExtentd& b);
/// Union of two boxes
extern FXAPI FXExtentd unite(const FXExtentd& a,const FXExtentd& b);
/// Intersection of two boxes
extern FXAPI FXExtentd intersect(const FXExtentd& a,const FXExtentd& b);
/// Save object to a stream
extern FXAPI FXStream& operator<<(FXStream& store,const FXExtentd& ext);
/// Load object from a stream
extern FXAPI FXStream& operator>>(FXStream& store,FXExtentd& ext);
}
#endif
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