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