COIN-OR::LEMON - Graph Library

source: lemon-0.x/lemon/color.h @ 2174:f9e43b5cc617

Last change on this file since 2174:f9e43b5cc617 was 2174:f9e43b5cc617, checked in by Alpar Juttner, 13 years ago

Some color constants added (BLACK, WHITE, RED etc)

File size: 5.8 KB
Line 
1/* -*- C++ -*-
2 *
3 * This file is a part of LEMON, a generic C++ optimization library
4 *
5 * Copyright (C) 2003-2006
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 <sys/time.h>
23
24#include<iostream>
25#include<fstream>
26#include<sstream>
27#include<algorithm>
28#include<vector>
29
30#include <ctime>
31#include <cmath>
32
33#include<lemon/bits/invalid.h>
34#include<lemon/xy.h>
35#include<lemon/maps.h>
36#include<lemon/bezier.h>
37
38
39///\ingroup misc
40///\file
41///\brief Tools to manage RGB colors.
42///
43///\author Alpar Juttner
44
45namespace lemon {
46
47  /// \addtogroup misc
48  /// @{
49
50///Data structure representing RGB colors.
51
52///Data structure representing RGB colors.
53///\ingroup misc
54class Color
55{
56  double _r,_g,_b;
57public:
58  ///Default constructor
59  Color() {}
60  ///Constructor
61  Color(double r,double g,double b) :_r(r),_g(g),_b(b) {};
62  ///Set the red component
63  double & red() {return _r;}
64  ///Return the red component
65  const double & red() const {return _r;}
66  ///Set the green component
67  double & green() {return _g;}
68  ///Return the green component
69  const double & green() const {return _g;}
70  ///Set the blue component
71  double & blue() {return _b;}
72  ///Return the blue component
73  const double & blue() const {return _b;}
74  ///Set the color components
75  void set(double r,double g,double b) { _r=r;_g=g;_b=b; };
76};
77
78  /// White color constant
79  extern const Color WHITE; 
80  /// Black color constant
81  extern const Color BLACK;
82  /// Red color constant
83  extern const Color RED;
84  /// Green color constant
85  extern const Color GREEN;
86  /// Blue color constant
87  extern const Color BLUE;
88  /// Yellow color constant
89  extern const Color YELLOW;
90  /// Magenta color constant
91  extern const Color MAGENTA;
92  /// Cyan color constant
93  extern const Color CYAN;
94  /// Grey color constant
95  extern const Color GREY;
96  /// Dark red color constant
97  extern const Color DARK_RED;
98  /// Dark green color constant
99  extern const Color DARK_GREEN;
100  /// Drak blue color constant
101  extern const Color DARK_BLUE;
102  /// Dark yellow color constant
103  extern const Color DARK_YELLOW;
104  /// Dark magenta color constant
105  extern const Color DARK_MAGENTA;
106  /// Dark cyan color constant
107  extern const Color DARK_CYAN;
108
109///Maps <tt>int</tt>s to different \ref Color "Color"s
110
111///This map assigns one of the predefined \ref Color "Color"s
112///to each <tt>int</tt>. It is possible to change the colors as well as their
113///number. The integer range is cyclically mapped to the provided set of colors.
114///
115///This is a true \ref concept::ReferenceMap "reference map", so you can also
116///change the actual colors.
117
118class Palette : public MapBase<int,Color>
119{
120  std::vector<Color> colors;
121public:
122  ///Constructor
123
124  ///Constructor
125  ///\param have_white indicates whether white is
126  ///amongst the provided color (\c true) or not (\c false). If it is true,
127  ///white will be assigned to \c 0.
128  ///\param num the number of the allocated colors. If it is \c 0,
129  ///the default color configuration is set up (26 color plus the white).
130  ///If \c num is less then 26/27 then the default color list is cut. Otherwise
131  ///the color list is filled repeatedly with the default color list.
132  ///(The colors can be changed later on.)
133  Palette(bool have_white=false,int num=0)
134  {
135    do {
136      if(have_white) colors.push_back(Color(1,1,1));
137
138      colors.push_back(Color(0,0,0));
139      colors.push_back(Color(1,0,0));
140      colors.push_back(Color(0,1,0));
141      colors.push_back(Color(0,0,1));
142      colors.push_back(Color(1,1,0));
143      colors.push_back(Color(1,0,1));
144      colors.push_back(Color(0,1,1));
145     
146      colors.push_back(Color(.5,0,0));
147      colors.push_back(Color(0,.5,0));
148      colors.push_back(Color(0,0,.5));
149      colors.push_back(Color(.5,.5,0));
150      colors.push_back(Color(.5,0,.5));
151      colors.push_back(Color(0,.5,.5));
152     
153      colors.push_back(Color(.5,.5,.5));
154      colors.push_back(Color(1,.5,.5));
155      colors.push_back(Color(.5,1,.5));
156      colors.push_back(Color(.5,.5,1));
157      colors.push_back(Color(1,1,.5));
158      colors.push_back(Color(1,.5,1));
159      colors.push_back(Color(.5,1,1));
160     
161      colors.push_back(Color(1,.5,0));
162      colors.push_back(Color(.5,1,0));
163      colors.push_back(Color(1,0,.5));
164      colors.push_back(Color(0,1,.5));
165      colors.push_back(Color(0,.5,1));
166      colors.push_back(Color(.5,0,1));
167    } while(int(colors.size())<num);
168    //    colors.push_back(Color(1,1,1));
169    if(num>0) colors.resize(num);
170  }
171  ///\e
172  Color &operator[](int i)
173  {
174    return colors[i%colors.size()];
175  }
176  ///\e
177  const Color &operator[](int i) const
178  {
179    return colors[i%colors.size()];
180  }
181  ///\e
182  void set(int i,const Color &c)
183  {
184    colors[i%colors.size()]=c;
185  }
186  ///Sets the number of the exiting colors.
187  void resize(int s) { colors.resize(s);}
188  ///Returns the number of the existing colors.
189  std::size_t size() const { return colors.size();}
190};
191
192///Returns a visible distinct \ref Color
193
194///Returns a \ref Color which is as different from the given parameter
195///as it is possible.
196inline Color distantColor(const Color &c)
197{
198  return Color(c.red()<.5?1:0,c.green()<.5?1:0,c.blue()<.5?1:0);
199}
200///Returns black for light colors and white for the dark ones.
201
202///Returns black for light colors and white for the dark ones.
203inline Color distantBW(const Color &c){
204  return (.2125*c.red()+.7154*c.green()+.0721*c.blue())<.5 ? WHITE : BLACK;
205}
206
207/// @}
208
209} //END OF NAMESPACE LEMON
210
211#endif // LEMON_COLOR_H
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