Better handling of inexact computation.
We do not use tolerance for excess, just for edges
3 * This file is a part of LEMON, a generic C++ optimization library
5 * Copyright (C) 2003-2006
6 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
7 * (Egervary Research Group on Combinatorial Optimization, EGRES).
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.
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
24 #include<lemon/maps.h>
29 ///\brief Tools to manage RGB colors.
31 ///\author Alpar Juttner
39 ///Data structure representing RGB colors.
41 ///Data structure representing RGB colors.
46 ///Default 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; };
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;
97 ///Map <tt>int</tt>s to different \ref Color "Color"s
99 ///This map assigns one of the predefined \ref Color "Color"s
100 ///to each <tt>int</tt>. It is possible to change the colors as well as their
101 ///number. The integer range is cyclically mapped to the provided set of colors.
103 ///This is a true \ref concepts::ReferenceMap "reference map", so you can also
104 ///change the actual colors.
106 class Palette : public MapBase<int,Color>
108 std::vector<Color> colors;
113 ///\param have_white indicates whether white is
114 ///amongst the provided color (\c true) or not (\c false). If it is true,
115 ///white will be assigned to \c 0.
116 ///\param num the number of the allocated colors. If it is \c 0,
117 ///the default color configuration is set up (26 color plus the white).
118 ///If \c num is less then 26/27 then the default color list is cut. Otherwise
119 ///the color list is filled repeatedly with the default color list.
120 ///(The colors can be changed later on.)
121 Palette(bool have_white=false,int num=0)
124 if(have_white) colors.push_back(Color(1,1,1));
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));
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));
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));
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 // colors.push_back(Color(1,1,1));
157 if(num>0) colors.resize(num);
160 Color &operator[](int i)
162 return colors[i%colors.size()];
165 const Color &operator[](int i) const
167 return colors[i%colors.size()];
170 void set(int i,const Color &c)
172 colors[i%colors.size()]=c;
174 ///Sets the number of the exiting colors.
175 void resize(int s) { colors.resize(s);}
176 ///Returns the number of the existing colors.
177 std::size_t size() const { return colors.size();}
180 ///Returns a visible distinct \ref Color
182 ///Returns a \ref Color which is as different from the given parameter
183 ///as it is possible.
184 inline Color distantColor(const Color &c)
186 return Color(c.red()<.5?1:0,c.green()<.5?1:0,c.blue()<.5?1:0);
188 ///Returns black for light colors and white for the dark ones.
190 ///Returns black for light colors and white for the dark ones.
191 inline Color distantBW(const Color &c){
192 return (.2125*c.red()+.7154*c.green()+.0721*c.blue())<.5 ? WHITE : BLACK;
197 } //END OF NAMESPACE LEMON
199 #endif // LEMON_COLOR_H