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