LEMON/LEMON-main Changeset - r241:92f046dd7f6c

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Changeset - r241:92f046dd7f6c

« 235:b46d27

242:dbe3fc »

r241:92f046dd7f6c

Tue, 29 Jul 2008 14:41:16

[Not Reviewed]

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kpeter (Peter Kovacs)
kpeter@inf.elte.hu

Improvements in dim2::BoundingBox (ticket #126) - Rename the private varibles to start with underscore. - Doc improvements.

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1 file changed with 66 insertions and 64 deletions:

lemon/dim2.h

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lemon/dim2.h

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 		/* -*- mode: C++; indent-tabs-mode: nil; -*-
+		 *
 		 * This file is a part of LEMON, a generic C++ optimization library.
+		 *
 		 * Copyright (C) 2003-2008
 		 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
 		 * (Egervary Research Group on Combinatorial Optimization, EGRES).
+		 *
 		 * Permission to use, modify and distribute this software is granted
 		 * provided that this copyright notice appears in all copies. For
 		 * precise terms see the accompanying LICENSE file.
+		 *
 		 * This software is provided "AS IS" with no warranty of any kind,
 		 * express or implied, and with no claim as to its suitability for any
 		 * purpose.
+		 *
 		 */
 		#ifndef LEMON_DIM2_H
 		#define LEMON_DIM2_H
 		#include <iostream>
 		#include <lemon/core.h>
 		///\ingroup misc
 		///\file
 		///\brief A simple two dimensional vector and a bounding box implementation
 		///
 		/// The class \ref lemon::dim2::Point "dim2::Point" implements
 		/// a two dimensional vector with the usual operations.
 		///
 		/// The class \ref lemon::dim2::BoundingBox "dim2::BoundingBox"
 		/// can be used to determine
 		/// the rectangular bounding box of a set of
 		/// \ref lemon::dim2::Point "dim2::Point"'s.
 		namespace lemon {
 		  ///Tools for handling two dimensional coordinates
 		  ///This namespace is a storage of several
 		  ///tools for handling two dimensional coordinates
 		  namespace dim2 {
 		  /// \addtogroup misc
 		  /// @{
-		  /// A simple two dimensional vector (plainvector) implementation
+		  /// A simple two dimensional vector (plain vector) implementation
-		  /// A simple two dimensional vector (plainvector) implementation
+		  /// A simple two dimensional vector (plain vector) implementation
 		  /// with the usual vector operations.
 		  template<typename T>
 		    class Point {
 		    public:
 		      typedef T Value;
 		      ///First coordinate
 		      T x;
 		      ///Second coordinate
 		      T y;
 		      ///Default constructor
 		      Point() {}
 		      ///Construct an instance from coordinates
 		      Point(T a, T b) : x(a), y(b) { }
 		      ///Returns the dimension of the vector (i.e. returns 2).
 		      ///The dimension of the vector.
 		      ///This function always returns 2.
 		      int size() const { return 2; }
@@ -165,386 +164,389 @@
 		      ///Test inequality
 		      bool operator!=(Point u) const {
 		        return  (x!=u.x) || (y!=u.y);
+		      }
 		    };
 		  ///Return a Point
 		  ///Return a Point.
 		  ///\relates Point
 		  template <typename T>
 		  inline Point<T> makePoint(const T& x, const T& y) {
 		    return Point<T>(x, y);
+		  }
 		  ///Return a vector multiplied by a scalar
 		  ///Return a vector multiplied by a scalar.
 		  ///\relates Point
 		  template<typename T> Point<T> operator*(const T &u,const Point<T> &x) {
 		    return x*u;
+		  }
-		  ///Read a plainvector from a stream
+		  ///Read a plain vector from a stream
-		  ///Read a plainvector from a stream.
+		  ///Read a plain vector from a stream.
 		  ///\relates Point
 		  ///
 		  template<typename T>
 		  inline std::istream& operator>>(std::istream &is, Point<T> &z) {
 		    char c;
 		    if (is >> c) {
 		      if (c != '(') is.putback(c);
 		    } else {
 		      is.clear();
+		    }
 		    if (!(is >> z.x)) return is;
 		    if (is >> c) {
 		      if (c != ',') is.putback(c);
 		    } else {
 		      is.clear();
+		    }
 		    if (!(is >> z.y)) return is;
 		    if (is >> c) {
 		      if (c != ')') is.putback(c);
 		    } else {
 		      is.clear();
+		    }
 		    return is;
+		  }
-		  ///Write a plainvector to a stream
+		  ///Write a plain vector to a stream
-		  ///Write a plainvector to a stream.
+		  ///Write a plain vector to a stream.
 		  ///\relates Point
 		  ///
 		  template<typename T>
 		  inline std::ostream& operator<<(std::ostream &os, const Point<T>& z)
+		  {
 		    os << "(" << z.x << ", " << z.y << ")";
 		    return os;
+		  }
 		  ///Rotate by 90 degrees
 		  ///Returns the parameter rotated by 90 degrees in positive direction.
 		  ///\relates Point
 		  ///
 		  template<typename T>
 		  inline Point<T> rot90(const Point<T> &z)
+		  {
 		    return Point<T>(-z.y,z.x);
+		  }
 		  ///Rotate by 180 degrees
 		  ///Returns the parameter rotated by 180 degrees.
 		  ///\relates Point
 		  ///
 		  template<typename T>
 		  inline Point<T> rot180(const Point<T> &z)
+		  {
 		    return Point<T>(-z.x,-z.y);
+		  }
 		  ///Rotate by 270 degrees
 		  ///Returns the parameter rotated by 90 degrees in negative direction.
 		  ///\relates Point
 		  ///
 		  template<typename T>
 		  inline Point<T> rot270(const Point<T> &z)
+		  {
 		    return Point<T>(z.y,-z.x);
+		  }
-		  /// A class to calculate or store the bounding box of plainvectors.
+		    /// A class to calculate or store the bounding box of plain vectors.
 		  /// A class to calculate or store the bounding box of plainvectors.
 		  ///
 		    /// A class to calculate or store the bounding box of plain vectors.
 		    ///
 		    template<typename T>
 		    class BoundingBox {
-		      Point<T> bottom_left, top_right;
+		      Point<T> _bottom_left, _top_right;
 		      bool _empty;
 		    public:
 		      ///Default constructor: creates an empty bounding box
 		      BoundingBox() { _empty = true; }
 		      ///Construct an instance from one point
-		      BoundingBox(Point<T> a) { bottom_left=top_right=a; _empty = false; }
 		      BoundingBox(Point<T> a) {
 		        _bottom_left = _top_right = a;
 		        _empty = false;
+		      }
 		      ///Construct an instance from two points
 		      ///Construct an instance from two points.
 		      ///\param a The bottom left corner.
 		      ///\param b The top right corner.
 		      ///\warning The coordinates of the bottom left corner must be no more
 		      ///than those of the top right one.
 		      BoundingBox(Point<T> a,Point<T> b)
+		      {
 		        bottom_left=a;
 		        top_right=b;
 		        _bottom_left = a;
 		        _top_right = b;
 		        _empty = false;
+		      }
 		      ///Construct an instance from four numbers
 		      ///Construct an instance from four numbers.
 		      ///\param l The left side of the box.
 		      ///\param b The bottom of the box.
 		      ///\param r The right side of the box.
 		      ///\param t The top of the box.
 		      ///\warning The left side must be no more than the right side and
 		      ///bottom must be no more than the top.
 		      BoundingBox(T l,T b,T r,T t)
+		      {
 		        bottom_left=Point<T>(l,b);
 		        top_right=Point<T>(r,t);
 		        _bottom_left=Point<T>(l,b);
 		        _top_right=Point<T>(r,t);
 		        _empty = false;
+		      }
 		      ///Return \c true if the bounding box is empty.
 		      ///Return \c true if the bounding box is empty (i.e. return \c false
 		      ///if at least one point was added to the box or the coordinates of
 		      ///the box were set).
 		      ///
 		      ///The coordinates of an empty bounding box are not defined.
 		      bool empty() const {
 		        return _empty;
+		      }
 		      ///Make the BoundingBox empty
 		      void clear() {
-		        _empty=1;
+		        _empty = true;
+		      }
 		      ///Give back the bottom left corner of the box
 		      ///Give back the bottom left corner of the box.
 		      ///If the bounding box is empty, then the return value is not defined.
 		      Point<T> bottomLeft() const {
-		        return bottom_left;
+		        return _bottom_left;
+		      }
 		      ///Set the bottom left corner of the box
 		      ///Set the bottom left corner of the box.
-		      ///It should only be used for non-empty box.
+		      ///\pre The box must not be empty.
 		      void bottomLeft(Point<T> p) {
-		        bottom_left = p;
+		        _bottom_left = p;
+		      }
 		      ///Give back the top right corner of the box
 		      ///Give back the top right corner of the box.
 		      ///If the bounding box is empty, then the return value is not defined.
 		      Point<T> topRight() const {
-		        return top_right;
+		        return _top_right;
+		      }
 		      ///Set the top right corner of the box
 		      ///Set the top right corner of the box.
-		      ///It should only be used for non-empty box.
+		      ///\pre The box must not be empty.
 		      void topRight(Point<T> p) {
-		        top_right = p;
+		        _top_right = p;
+		      }
 		      ///Give back the bottom right corner of the box
 		      ///Give back the bottom right corner of the box.
 		      ///If the bounding box is empty, then the return value is not defined.
 		      Point<T> bottomRight() const {
-		        return Point<T>(top_right.x,bottom_left.y);
+		        return Point<T>(_top_right.x,_bottom_left.y);
+		      }
 		      ///Set the bottom right corner of the box
 		      ///Set the bottom right corner of the box.
-		      ///It should only be used for non-empty box.
+		      ///\pre The box must not be empty.
 		      void bottomRight(Point<T> p) {
 		        top_right.x = p.x;
 		        bottom_left.y = p.y;
 		        _top_right.x = p.x;
 		        _bottom_left.y = p.y;
+		      }
 		      ///Give back the top left corner of the box
 		      ///Give back the top left corner of the box.
 		      ///If the bounding box is empty, then the return value is not defined.
 		      Point<T> topLeft() const {
-		        return Point<T>(bottom_left.x,top_right.y);
+		        return Point<T>(_bottom_left.x,_top_right.y);
+		      }
 		      ///Set the top left corner of the box
 		      ///Set the top left corner of the box.
-		      ///It should only be used for non-empty box.
+		      ///\pre The box must not be empty.
 		      void topLeft(Point<T> p) {
 		        top_right.y = p.y;
 		        bottom_left.x = p.x;
 		        _top_right.y = p.y;
 		        _bottom_left.x = p.x;
+		      }
 		      ///Give back the bottom of the box
 		      ///Give back the bottom of the box.
 		      ///If the bounding box is empty, then the return value is not defined.
 		      T bottom() const {
-		        return bottom_left.y;
+		        return _bottom_left.y;
+		      }
 		      ///Set the bottom of the box
 		      ///Set the bottom of the box.
-		      ///It should only be used for non-empty box.
+		      ///\pre The box must not be empty.
 		      void bottom(T t) {
-		        bottom_left.y = t;
+		        _bottom_left.y = t;
+		      }
 		      ///Give back the top of the box
 		      ///Give back the top of the box.
 		      ///If the bounding box is empty, then the return value is not defined.
 		      T top() const {
-		        return top_right.y;
+		        return _top_right.y;
+		      }
 		      ///Set the top of the box
 		      ///Set the top of the box.
-		      ///It should only be used for non-empty box.
+		      ///\pre The box must not be empty.
 		      void top(T t) {
-		        top_right.y = t;
+		        _top_right.y = t;
+		      }
 		      ///Give back the left side of the box
 		      ///Give back the left side of the box.
 		      ///If the bounding box is empty, then the return value is not defined.
 		      T left() const {
-		        return bottom_left.x;
+		        return _bottom_left.x;
+		      }
 		      ///Set the left side of the box
 		      ///Set the left side of the box.
-		      ///It should only be used for non-empty box.
+		      ///\pre The box must not be empty.
 		      void left(T t) {
-		        bottom_left.x = t;
+		        _bottom_left.x = t;
+		      }
 		      /// Give back the right side of the box
 		      /// Give back the right side of the box.
 		      ///If the bounding box is empty, then the return value is not defined.
 		      T right() const {
-		        return top_right.x;
+		        return _top_right.x;
+		      }
 		      ///Set the right side of the box
 		      ///Set the right side of the box.
-		      ///It should only be used for non-empty box.
+		      ///\pre The box must not be empty.
 		      void right(T t) {
-		        top_right.x = t;
+		        _top_right.x = t;
+		      }
 		      ///Give back the height of the box
 		      ///Give back the height of the box.
 		      ///If the bounding box is empty, then the return value is not defined.
 		      T height() const {
-		        return top_right.y-bottom_left.y;
+		        return _top_right.y-_bottom_left.y;
+		      }
 		      ///Give back the width of the box
 		      ///Give back the width of the box.
 		      ///If the bounding box is empty, then the return value is not defined.
 		      T width() const {
-		        return top_right.x-bottom_left.x;
+		        return _top_right.x-_bottom_left.x;
+		      }
 		      ///Checks whether a point is inside a bounding box
 		      bool inside(const Point<T>& u) const {
 		        if (_empty)
 		          return false;
 		        else{
 		          return ((u.x-bottom_left.x)*(top_right.x-u.x) >= 0 &&
-		              (u.y-bottom_left.y)*(top_right.y-u.y) >= 0 );
+		        else {
 		          return ( (u.x-_bottom_left.x)*(_top_right.x-u.x) >= 0 &&
 		                   (u.y-_bottom_left.y)*(_top_right.y-u.y) >= 0 );
+		        }
+		      }
 		      ///Increments a bounding box with a point
 		      ///Increments a bounding box with a point.
 		      ///
 		      BoundingBox& add(const Point<T>& u){
 		        if (_empty){
 		          bottom_left=top_right=u;
 		        if (_empty) {
 		          _bottom_left = _top_right = u;
 		          _empty = false;
+		        }
 		        else{
 		          if (bottom_left.x > u.x) bottom_left.x = u.x;
 		          if (bottom_left.y > u.y) bottom_left.y = u.y;
 		          if (top_right.x < u.x) top_right.x = u.x;
-		          if (top_right.y < u.y) top_right.y = u.y;
+		        else {
 		          if (_bottom_left.x > u.x) _bottom_left.x = u.x;
 		          if (_bottom_left.y > u.y) _bottom_left.y = u.y;
 		          if (_top_right.x < u.x) _top_right.x = u.x;
 		          if (_top_right.y < u.y) _top_right.y = u.y;
+		        }
 		        return *this;
+		      }
 		      ///Increments a bounding box to contain another bounding box
 		      ///Increments a bounding box to contain another bounding box.
 		      ///
 		      BoundingBox& add(const BoundingBox &u){
 		        if ( !u.empty() ){
 		          this->add(u.bottomLeft());
 		          this->add(u.topRight());
 		          add(u._bottom_left);
 		          add(u._top_right);
+		        }
 		        return *this;
+		      }
 		      ///Intersection of two bounding boxes
 		      ///Intersection of two bounding boxes.
 		      ///
 		      BoundingBox operator&(const BoundingBox& u) const {
 		        BoundingBox b;
-		        if (this->_empty || u._empty) {
 		        if (_empty || u._empty) {
 		          b._empty = true;
 		        } else {
 		          b.bottom_left.x = std::max(this->bottom_left.x,u.bottom_left.x);
 		          b.bottom_left.y = std::max(this->bottom_left.y,u.bottom_left.y);
 		          b.top_right.x = std::min(this->top_right.x,u.top_right.x);
 		          b.top_right.y = std::min(this->top_right.y,u.top_right.y);
 		          b._empty = b.bottom_left.x > b.top_right.x ||
 		                     b.bottom_left.y > b.top_right.y;
 		          b._bottom_left.x = std::max(_bottom_left.x, u._bottom_left.x);
 		          b._bottom_left.y = std::max(_bottom_left.y, u._bottom_left.y);
 		          b._top_right.x = std::min(_top_right.x, u._top_right.x);
 		          b._top_right.y = std::min(_top_right.y, u._top_right.y);
 		          b._empty = b._bottom_left.x > b._top_right.x ||
 		                     b._bottom_left.y > b._top_right.y;
+		        }
 		        return b;
+		      }
 		    };//class Boundingbox
 		  ///Map of x-coordinates of a \ref Point "Point"-map
 		  ///\ingroup maps
 		  ///Map of x-coordinates of a \ref Point "Point"-map.
 		  ///
 		  template<class M>
 		  class XMap
+		  {
 		    M& _map;
 		  public:
 		    typedef typename M::Value::Value Value;
 		    typedef typename M::Key Key;
 		    ///\e
 		    XMap(M& map) : _map(map) {}
 		    Value operator[](Key k) const {return _map[k].x;}
 		    void set(Key k,Value v) {_map.set(k,typename M::Value(v,_map[k].y));}

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