COIN-OR::LEMON - Graph Library

source: lemon-1.2/lemon/color.h @ 887:77704bf2a4ae

Last change on this file since 887:77704bf2a4ae was 440:88ed40ad0d4f, checked in by Alpar Juttner <alpar@…>, 11 years ago

Happy New Year again

  • update the copyright headers + run the source unifier
File size: 5.9 KB
RevLine 
[209]1/* -*- mode: C++; indent-tabs-mode: nil; -*-
[128]2 *
[209]3 * This file is a part of LEMON, a generic C++ optimization library.
[128]4 *
[440]5 * Copyright (C) 2003-2009
[128]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
31namespace lemon {
32
33
34  /// \addtogroup misc
35  /// @{
36
37  ///Data structure representing RGB colors.
38
39  ///Data structure representing RGB colors.
40  class Color
41  {
42    double _r,_g,_b;
43  public:
44    ///Default constructor
45    Color() {}
46    ///Constructor
47    Color(double r,double g,double b) :_r(r),_g(g),_b(b) {};
48    ///Set the red component
49    double & red() {return _r;}
50    ///Return the red component
51    const double & red() const {return _r;}
52    ///Set the green component
53    double & green() {return _g;}
54    ///Return the green component
55    const double & green() const {return _g;}
56    ///Set the blue component
57    double & blue() {return _b;}
58    ///Return the blue component
59    const double & blue() const {return _b;}
60    ///Set the color components
61    void set(double r,double g,double b) { _r=r;_g=g;_b=b; };
62  };
63
64  /// White color constant
[209]65  extern const Color WHITE;
[128]66  /// Black color constant
67  extern const Color BLACK;
68  /// Red color constant
69  extern const Color RED;
70  /// Green color constant
71  extern const Color GREEN;
72  /// Blue color constant
73  extern const Color BLUE;
74  /// Yellow color constant
75  extern const Color YELLOW;
76  /// Magenta color constant
77  extern const Color MAGENTA;
78  /// Cyan color constant
79  extern const Color CYAN;
80  /// Grey color constant
81  extern const Color GREY;
82  /// Dark red color constant
83  extern const Color DARK_RED;
84  /// Dark green color constant
85  extern const Color DARK_GREEN;
86  /// Drak blue color constant
87  extern const Color DARK_BLUE;
88  /// Dark yellow color constant
89  extern const Color DARK_YELLOW;
90  /// Dark magenta color constant
91  extern const Color DARK_MAGENTA;
92  /// Dark cyan color constant
93  extern const Color DARK_CYAN;
94
[313]95  ///Map <tt>int</tt>s to different <tt>Color</tt>s
[128]96
97  ///This map assigns one of the predefined \ref Color "Color"s to
98  ///each <tt>int</tt>. It is possible to change the colors as well as
99  ///their number. The integer range is cyclically mapped to the
100  ///provided set of colors.
101  ///
102  ///This is a true \ref concepts::ReferenceMap "reference map", so
103  ///you can also change the actual colors.
104
105  class Palette : public MapBase<int,Color>
106  {
107    std::vector<Color> colors;
108  public:
109    ///Constructor
110
[206]111    ///Constructor.
112    ///\param have_white Indicates whether white is among the
[133]113    ///provided initial colors (\c true) or not (\c false). If it is true,
114    ///white will be assigned to \c 0.
[206]115    ///\param num The number of the allocated colors. If it is \c -1,
[133]116    ///the default color configuration is set up (26 color plus optionaly the
[128]117    ///white).  If \c num is less then 26/27 then the default color
118    ///list is cut. Otherwise the color list is filled repeatedly with
119    ///the default color list.  (The colors can be changed later on.)
[129]120    Palette(bool have_white=false,int num=-1)
[128]121    {
122      if (num==0) return;
123      do {
124        if(have_white) colors.push_back(Color(1,1,1));
125
126        colors.push_back(Color(0,0,0));
127        colors.push_back(Color(1,0,0));
128        colors.push_back(Color(0,1,0));
129        colors.push_back(Color(0,0,1));
130        colors.push_back(Color(1,1,0));
131        colors.push_back(Color(1,0,1));
132        colors.push_back(Color(0,1,1));
[209]133
[128]134        colors.push_back(Color(.5,0,0));
135        colors.push_back(Color(0,.5,0));
136        colors.push_back(Color(0,0,.5));
137        colors.push_back(Color(.5,.5,0));
138        colors.push_back(Color(.5,0,.5));
139        colors.push_back(Color(0,.5,.5));
[209]140
[128]141        colors.push_back(Color(.5,.5,.5));
142        colors.push_back(Color(1,.5,.5));
143        colors.push_back(Color(.5,1,.5));
144        colors.push_back(Color(.5,.5,1));
145        colors.push_back(Color(1,1,.5));
146        colors.push_back(Color(1,.5,1));
147        colors.push_back(Color(.5,1,1));
[209]148
[128]149        colors.push_back(Color(1,.5,0));
150        colors.push_back(Color(.5,1,0));
151        colors.push_back(Color(1,0,.5));
152        colors.push_back(Color(0,1,.5));
153        colors.push_back(Color(0,.5,1));
154        colors.push_back(Color(.5,0,1));
155      } while(int(colors.size())<num);
156      if(num>=0) colors.resize(num);
157    }
158    ///\e
159    Color &operator[](int i)
160    {
161      return colors[i%colors.size()];
162    }
163    ///\e
164    const Color &operator[](int i) const
165    {
166      return colors[i%colors.size()];
167    }
168    ///\e
169    void set(int i,const Color &c)
170    {
171      colors[i%colors.size()]=c;
172    }
[206]173    ///Adds a new color to the end of the color list.
[209]174    void add(const Color &c)
[128]175    {
176      colors.push_back(c);
177    }
178
[206]179    ///Sets the number of the existing colors.
[128]180    void resize(int s) { colors.resize(s);}
181    ///Returns the number of the existing colors.
182    int size() const { return int(colors.size());}
183  };
184
[133]185  ///Returns a visibly distinct \ref Color
[128]186
187  ///Returns a \ref Color which is as different from the given parameter
188  ///as it is possible.
[209]189  inline Color distantColor(const Color &c)
[128]190  {
191    return Color(c.red()<.5?1:0,c.green()<.5?1:0,c.blue()<.5?1:0);
192  }
193  ///Returns black for light colors and white for the dark ones.
194
195  ///Returns black for light colors and white for the dark ones.
196  inline Color distantBW(const Color &c){
197    return (.2125*c.red()+.7154*c.green()+.0721*c.blue())<.5 ? WHITE : BLACK;
198  }
199
200  /// @}
201
202} //END OF NAMESPACE LEMON
203
204#endif // LEMON_COLOR_H
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