Class: Savio::HsvColor

Inherits:
Struct
  • Object
show all
Defined in:
lib/savio/hsv2rgb.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#h ⇒ Object

Returns the value of attribute h

Returns:

  • (Object) —

    the current value of h



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# File 'lib/savio/hsv2rgb.rb', line 39

def h
  @h
end

#s ⇒ Object

Returns the value of attribute s

Returns:

  • (Object) —

    the current value of s



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# File 'lib/savio/hsv2rgb.rb', line 39

def s
  @s
end

#v ⇒ Object

Returns the value of attribute v

Returns:

  • (Object) —

    the current value of v



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# File 'lib/savio/hsv2rgb.rb', line 39

def v
  @v
end

Class Method Details

.newFromRGB(rgb) ⇒ Object 



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# File 'lib/savio/hsv2rgb.rb', line 40

def self.newFromRGB(rgb)
  hsv = rgb.to_hsv()
  return HsvColor.new(hsv.h,hsv.s,hsv.v)
end

Instance Method Details

#to_rgb ⇒ Object 



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# File 'lib/savio/hsv2rgb.rb', line 44

def to_rgb()
  hue = h.to_f
  saturation = s.to_f
  value = v.to_f

  chroma = (value * saturation).to_f
  hPrime = hue/60.0
  x = (chroma * (1 - (hPrime % 2 - 1).abs)).to_f

  if 0 <= hPrime && hPrime < 1
    rgb = [chroma, x, 0]
  elsif 1 <= hPrime && hPrime < 2
    rgb = [x, chroma, 0]
  elsif 2 <= hPrime && hPrime < 3
    rgb = [0, chroma, x]
  elsif 3 <= hPrime && hPrime < 4
    rgb = [0, x, chroma]
  elsif 4 <= hPrime && hPrime < 5
    rgb = [x, 0, chroma]
  elsif 5 <= hPrime && hPrime < 6
    rgb = [chroma, 0, x]
  else
    rgb = [0,0,0]
  end

  match = (value - chroma).to_f

  rgb[0] = (rgb[0] + match).to_f
  rgb[1] = (rgb[1] + match).to_f
  rgb[2] = (rgb[2] + match).to_f

  return RgbColor.new(rgb[0],rgb[1],rgb[2])
end