libfox-1.6-dev 1.6.50-1 / usr / include / fox-1.6 / FXExtentf.h

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/********************************************************************************
*                                                                               *
*          S i n g l e - P r e c i s i o n    E x t e n t    C l a s s          *
*                                                                               *
*********************************************************************************
* Copyright (C) 2004,2006 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 2.1 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 library; if not, write to the Free Software           *
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.    *
*********************************************************************************
* $Id: FXExtentf.h,v 1.8.2.1 2006/07/25 01:35:36 fox Exp $                          *
********************************************************************************/
#ifndef FXEXTENTF_H
#define FXEXTENTF_H


namespace FX {


/// Extent
class FXAPI FXExtentf {
public:
  FXVec2f lower;
  FXVec2f upper;
public:

  /// Default constructor
  FXExtentf(){}

  /// Copy constructor
  FXExtentf(const FXExtentf& ext):lower(ext.lower),upper(ext.upper){}

  /// Initialize from two vectors
  FXExtentf(const FXVec2f& lo,const FXVec2f& hi):lower(lo),upper(hi){}

  /// Initialize from six numbers
  FXExtentf(FXfloat xlo,FXfloat xhi,FXfloat ylo,FXfloat yhi):lower(xlo,ylo),upper(xhi,yhi){}

  /// Assignment
  FXExtentf& operator=(const FXExtentf& ext){ lower=ext.lower; upper=ext.upper; return *this; }

  /// Indexing with 0..1
  FXVec2f& operator[](FXint i){ return (&lower)[i]; }

  /// Indexing with 0..1
  const FXVec2f& operator[](FXint i) const { return (&lower)[i]; }

  /// Comparison
  bool operator==(const FXExtentf& ext) const { return lower==ext.lower && upper==ext.upper;}
  bool operator!=(const FXExtentf& ext) const { return lower!=ext.lower || upper!=ext.upper;}

  /// Width of box
  FXfloat width() const { return upper.x-lower.x; }

  /// Height of box
  FXfloat height() const { return upper.y-lower.y; }

  /// Longest side
  FXfloat longest() const;

  /// shortest side
  FXfloat shortest() const;

  /// Length of diagonal
  FXfloat diameter() const;

  /// Get radius of box
  FXfloat radius() const;

  /// Compute diagonal
  FXVec2f diagonal() const;

  /// Get center of box
  FXVec2f center() const;

  /// Test if empty
  bool empty() const;

  /// Test if box contains point x,y
  bool contains(FXfloat x,FXfloat y) const;

  /// Test if box contains point p
  bool contains(const FXVec2f& p) const;

  /// Test if box properly contains another box
  bool contains(const FXExtentf& ext) const;

  /// Include point
  FXExtentf& include(FXfloat x,FXfloat y);

  /// Include point
  FXExtentf& include(const FXVec2f& v);

  /// Include given range into extent
  FXExtentf& include(const FXExtentf& ext);

  /// Test if bounds overlap
  friend FXAPI bool overlap(const FXExtentf& a,const FXExtentf& b);

  /// Get corner number 0..3
  FXVec2f corner(FXint c) const { return FXVec2f((&lower)[c&1].x, (&lower)[(c>>1)&1].y); }

  /// Union of two boxes
  friend FXAPI FXExtentf unite(const FXExtentf& a,const FXExtentf& b);

  /// Intersection of two boxes
  friend FXAPI FXExtentf intersect(const FXExtentf& a,const FXExtentf& b);

  /// Save object to a stream
  friend FXAPI FXStream& operator<<(FXStream& store,const FXExtentf& ext);

  /// Load object from a stream
  friend FXAPI FXStream& operator>>(FXStream& store,FXExtentf& ext);
  };


extern FXAPI bool overlap(const FXExtentf& a,const FXExtentf& b);

extern FXAPI FXExtentf unite(const FXExtentf& a,const FXExtentf& b);
extern FXAPI FXExtentf intersect(const FXExtentf& a,const FXExtentf& b);

extern FXAPI FXStream& operator<<(FXStream& store,const FXExtentf& ext);
extern FXAPI FXStream& operator>>(FXStream& store,FXExtentf& ext);

}

#endif

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