Class: Graphics::Hue

Inherits:
Rainbow show all
Defined in:
lib/graphics/rainbows.rb

Overview

The full RGB spectrum

Instance Attribute Summary

Attributes inherited from Rainbow

#cache

Instance Method Summary collapse

Methods inherited from Rainbow

#cache_colors, #clamp, #color, #initialize, #scale

Constructor Details

This class inherits a constructor from Graphics::Rainbow

Instance Method Details

#_color(degree) ⇒ Object

:nodoc:



64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
 
# File 'lib/graphics/rainbows.rb', line 64

def _color degree # :nodoc:
  main_color = 1 * 255 # Let chroma (saturation * brightness) always == 1
  second_strongest_color = ((1 - (degree/60.0 % 2 - 1).abs) * 255).floor

  case degree
  when 0..60
    [main_color, second_strongest_color, 0]
  when 61..120
    [second_strongest_color, main_color, 0]
  when 121..180
    [0, main_color, second_strongest_color]
  when 181..240
    [0, second_strongest_color, main_color]
  when 241..300
    [second_strongest_color, 0, main_color]
  when 301..360
    [main_color, 0, second_strongest_color]
  end
end