COIN-OR::LEMON - Graph Library

source: lemon-1.0/lemon/color.h @ 138:a0f755a30cf1

Last change on this file since 138:a0f755a30cf1 was 133:d76e2ff9c70d, checked in by Alpar Juttner <alpar@…>, 12 years ago

Several doc improvements + new default parameter values

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Several minor improvements in graph_to_eps.h

  • * *

Several minor improvements in graph_to_eps.h

File size: 6.0 KB
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1/* -*- C++ -*-
2 *
3 * This file is a part of LEMON, a generic C++ optimization library
4 *
5 * Copyright (C) 2003-2008
6 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
7 * (Egervary Research Group on Combinatorial Optimization, EGRES).
8 *
9 * Permission to use, modify and distribute this software is granted
10 * provided that this copyright notice appears in all copies. For
11 * precise terms see the accompanying LICENSE file.
12 *
13 * This software is provided "AS IS" with no warranty of any kind,
14 * express or implied, and with no claim as to its suitability for any
15 * purpose.
16 *
17 */
18
19#ifndef LEMON_COLOR_H
20#define LEMON_COLOR_H
21
22#include<vector>
23#include<lemon/math.h>
24#include<lemon/maps.h>
25
26
27///\ingroup misc
28///\file
29///\brief Tools to manage RGB colors.
30///
31///\author Alpar Juttner
32
33namespace lemon {
34
35
36  /// \addtogroup misc
37  /// @{
38
39  ///Data structure representing RGB colors.
40
41  ///Data structure representing RGB colors.
42  class Color
43  {
44    double _r,_g,_b;
45  public:
46    ///Default constructor
47    Color() {}
48    ///Constructor
49    Color(double r,double g,double b) :_r(r),_g(g),_b(b) {};
50    ///Set the red component
51    double & red() {return _r;}
52    ///Return the red component
53    const double & red() const {return _r;}
54    ///Set the green component
55    double & green() {return _g;}
56    ///Return the green component
57    const double & green() const {return _g;}
58    ///Set the blue component
59    double & blue() {return _b;}
60    ///Return the blue component
61    const double & blue() const {return _b;}
62    ///Set the color components
63    void set(double r,double g,double b) { _r=r;_g=g;_b=b; };
64  };
65
66  /// White color constant
67  extern const Color WHITE; 
68  /// Black color constant
69  extern const Color BLACK;
70  /// Red color constant
71  extern const Color RED;
72  /// Green color constant
73  extern const Color GREEN;
74  /// Blue color constant
75  extern const Color BLUE;
76  /// Yellow color constant
77  extern const Color YELLOW;
78  /// Magenta color constant
79  extern const Color MAGENTA;
80  /// Cyan color constant
81  extern const Color CYAN;
82  /// Grey color constant
83  extern const Color GREY;
84  /// Dark red color constant
85  extern const Color DARK_RED;
86  /// Dark green color constant
87  extern const Color DARK_GREEN;
88  /// Drak blue color constant
89  extern const Color DARK_BLUE;
90  /// Dark yellow color constant
91  extern const Color DARK_YELLOW;
92  /// Dark magenta color constant
93  extern const Color DARK_MAGENTA;
94  /// Dark cyan color constant
95  extern const Color DARK_CYAN;
96
97  ///Map <tt>int</tt>s to different \ref Color "Color"s
98
99  ///This map assigns one of the predefined \ref Color "Color"s to
100  ///each <tt>int</tt>. It is possible to change the colors as well as
101  ///their number. The integer range is cyclically mapped to the
102  ///provided set of colors.
103  ///
104  ///This is a true \ref concepts::ReferenceMap "reference map", so
105  ///you can also change the actual colors.
106
107  class Palette : public MapBase<int,Color>
108  {
109    std::vector<Color> colors;
110  public:
111    ///Constructor
112
113    ///Constructor
114    ///\param have_white indicates whether white is amongst the
115    ///provided initial colors (\c true) or not (\c false). If it is true,
116    ///white will be assigned to \c 0.
117    ///\param num the number of the allocated colors. If it is \c -1,
118    ///the default color configuration is set up (26 color plus optionaly the
119    ///white).  If \c num is less then 26/27 then the default color
120    ///list is cut. Otherwise the color list is filled repeatedly with
121    ///the default color list.  (The colors can be changed later on.)
122    Palette(bool have_white=false,int num=-1)
123    {
124      if (num==0) return;
125      do {
126        if(have_white) colors.push_back(Color(1,1,1));
127
128        colors.push_back(Color(0,0,0));
129        colors.push_back(Color(1,0,0));
130        colors.push_back(Color(0,1,0));
131        colors.push_back(Color(0,0,1));
132        colors.push_back(Color(1,1,0));
133        colors.push_back(Color(1,0,1));
134        colors.push_back(Color(0,1,1));
135     
136        colors.push_back(Color(.5,0,0));
137        colors.push_back(Color(0,.5,0));
138        colors.push_back(Color(0,0,.5));
139        colors.push_back(Color(.5,.5,0));
140        colors.push_back(Color(.5,0,.5));
141        colors.push_back(Color(0,.5,.5));
142     
143        colors.push_back(Color(.5,.5,.5));
144        colors.push_back(Color(1,.5,.5));
145        colors.push_back(Color(.5,1,.5));
146        colors.push_back(Color(.5,.5,1));
147        colors.push_back(Color(1,1,.5));
148        colors.push_back(Color(1,.5,1));
149        colors.push_back(Color(.5,1,1));
150     
151        colors.push_back(Color(1,.5,0));
152        colors.push_back(Color(.5,1,0));
153        colors.push_back(Color(1,0,.5));
154        colors.push_back(Color(0,1,.5));
155        colors.push_back(Color(0,.5,1));
156        colors.push_back(Color(.5,0,1));
157      } while(int(colors.size())<num);
158      //    colors.push_back(Color(1,1,1));
159      if(num>=0) colors.resize(num);
160    }
161    ///\e
162    Color &operator[](int i)
163    {
164      return colors[i%colors.size()];
165    }
166    ///\e
167    const Color &operator[](int i) const
168    {
169      return colors[i%colors.size()];
170    }
171    ///\e
172    void set(int i,const Color &c)
173    {
174      colors[i%colors.size()]=c;
175    }
176    ///Add a new color to the end of the color list.
177    void add(const Color &c)
178    {
179      colors.push_back(c);
180    }
181
182    ///Sets the number of the exiting colors.
183    void resize(int s) { colors.resize(s);}
184    ///Returns the number of the existing colors.
185    int size() const { return int(colors.size());}
186  };
187
188  ///Returns a visibly distinct \ref Color
189
190  ///Returns a \ref Color which is as different from the given parameter
191  ///as it is possible.
192  inline Color distantColor(const Color &c)
193  {
194    return Color(c.red()<.5?1:0,c.green()<.5?1:0,c.blue()<.5?1:0);
195  }
196  ///Returns black for light colors and white for the dark ones.
197
198  ///Returns black for light colors and white for the dark ones.
199  inline Color distantBW(const Color &c){
200    return (.2125*c.red()+.7154*c.green()+.0721*c.blue())<.5 ? WHITE : BLACK;
201  }
202
203  /// @}
204
205} //END OF NAMESPACE LEMON
206
207#endif // LEMON_COLOR_H
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