Class: Color::HSL

Inherits:
Base
  • Object
show all
Defined in:
lib/color.rb

Instance Method Summary collapse

Methods inherited from Base

#+, #-, #==, inherited, #initialize, #primary_components, #to_a, #to_s

Constructor Details

This class inherits a constructor from Color::Base

Instance Method Details

#css=(string) ⇒ Object 



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# File 'lib/color.rb', line 145

def css=(string)
  self.h, self.s, self.l = RGB.new(string).to_hsl.to_a
end

#to_css ⇒ Object 



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# File 'lib/color.rb', line 141

def to_css
  to_rgb.to_css
end

#to_rgb ⇒ Object 



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# File 'lib/color.rb', line 124

def to_rgb
  return RGB.new(l, l, l, a) if epsilon(s)
  q = l < 0.5 ? l * (1.0 + s) : (l + s) - l * s
  p = 2 * l - q
  tc = [h + 1.0/3.0, h, h - 1.0/3.0]
  tc.map! do |x|
    x < 0 ? x + 1.0 :
      x > 1.0 ? x - 1.0 : x
  end
  rgb = tc.map do |tc|
    tc < 1.0/6.0 ? p + ((q - p) * 6.0 * tc) :
    tc < 3.0/6.0 ? q :
    tc < 4.0/6.0 ? p + ((q - p) * 6.0 * (2.0/3.0 - tc)) : p
  end
  RGB.new(rgb + [a])
end