codac2_Color.h

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#pragma once
 
#include <string>
#include <iomanip>
#include <math.h> 
 
#include"codac2_assert.h"
#include"codac2_Vector.h"
 
namespace codac2
{

  enum Model { RGB, HSV };

  struct Color : public std::array<float,4>
  {
    protected:
      Model m;
 
    public:
 
      // Constructors

      explicit Color();

      explicit Color(const std::array<float,3>& xyz, Model m_ = Model::RGB);

      explicit Color(const std::array<float,4>& xyza, Model m_ = Model::RGB);

      explicit Color(const std::initializer_list<float> xyza, Model m_ = Model::RGB);

      explicit Color(const std::string& hex_str);

      const Model& model() const { return m; }
 
 
      // other formats

      std::string hex_str() const;
 

      codac2::Vector vec() const;
 
      // Conversions

      Color rgb() const;

      Color hsv() const;
 
      // Overload flux operator

      friend std::ostream& operator<<(std::ostream& os, const Color& c)
      {
        if (c.m == Model::RGB)
          os << "RGB Color (" << c[0] << "," << c[1] << "," << c[2] << "," << c[3] << ")";
        else if (c.m == Model::HSV)
          os << "HSV Color (" << c[0] << "," << c[1] << "," << c[2] << "," << c[3] << ")";
        return os;
      }
 
      // Predefined colors

      static Color none()
      {
        return Color({255,255,255, 0.});
      };

      static Color random()
      {
        return Color({(float)Interval(0,360).rand(),100,100}, Model::HSV);
      };
 
      #define DEFINE_COLOR(NAME, R, G, B) \
        static Color NAME(float alpha = 1.) { \
            return Color({(float)(R), (float)(G), (float)(B), (float)(alpha * 255.)}); \
        }
 
      #define DEFINE_COLOR(NAME, R, G, B) \
        static Color NAME(float alpha = 1.) { \
            return Color({(float)(R), (float)(G), (float)(B), (float)(alpha * 255.)}); \
        }
 
      // Predefined colors
      
      DEFINE_COLOR(black,         0,   0,   0)
      DEFINE_COLOR(white,         255, 255, 255)
 
      DEFINE_COLOR(light_gray,    217, 217, 217)
      DEFINE_COLOR(gray,          180, 180, 180)
      DEFINE_COLOR(dark_gray,     112, 112, 112)
 
      DEFINE_COLOR(light_green,   184, 233, 118)
      DEFINE_COLOR(green,         144, 242, 0)
      DEFINE_COLOR(dark_green,    94,  158, 0)
 
      DEFINE_COLOR(light_blue,    75,  207, 250)
      DEFINE_COLOR(blue,          45,  152, 218)
      DEFINE_COLOR(dark_blue,     34,  112, 147)
 
      DEFINE_COLOR(light_cyan,    129, 236, 236)
      DEFINE_COLOR(cyan,          109, 200, 200)
      DEFINE_COLOR(dark_cyan,     82,  151, 151)
 
      DEFINE_COLOR(light_yellow,  255, 250, 101)
      DEFINE_COLOR(yellow,        255, 211, 42)
      DEFINE_COLOR(dark_yellow,   225, 177, 44)
 
      DEFINE_COLOR(light_orange,  253, 150, 68)
      DEFINE_COLOR(orange,        255, 159, 26)
      DEFINE_COLOR(dark_orange,   214, 134, 22)
 
      DEFINE_COLOR(light_red,     231, 127, 103)
      DEFINE_COLOR(red,           209, 59,  0)
      DEFINE_COLOR(dark_red,      179, 57,  57) 
 
      DEFINE_COLOR(light_brown,   208, 151, 71)
      DEFINE_COLOR(brown,         151, 109, 52)
      DEFINE_COLOR(dark_brown,    99,  72,  34)
 
      DEFINE_COLOR(light_purple,  205, 132, 241)
      DEFINE_COLOR(purple,        154, 0,   170)
      DEFINE_COLOR(dark_purple,   108, 0,   119)
 
      DEFINE_COLOR(light_pink,    253, 167, 223)
      DEFINE_COLOR(pink,          243, 104, 224)
      DEFINE_COLOR(dark_pink,     185, 79,  171)
  };
}