Class: ShadedAscii

Inherits:
AsciiImage show all
Defined in:
lib/honeybii/shaded_ascii.rb

Class Attribute Summary collapse

Attributes inherited from AsciiImage

#ascii, #raw

Instance Method Summary collapse

Methods inherited from AsciiImage

#to_s

Constructor Details

#initialize(image_filename, point_size = 12, gradient_level: 0) ⇒ ShadedAscii 



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# File 'lib/honeybii/shaded_ascii.rb', line 15

def initialize(image_filename, point_size = 12, gradient_level: 0)
  super image_filename, point_size
  @gradient = ShadedAscii.gradients[gradient_level]
  to_ascii!
end

Class Attribute Details

.gradients ⇒ Object

Returns the value of attribute gradients.



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# File 'lib/honeybii/shaded_ascii.rb', line 3

def gradients
  @gradients
end

Instance Method Details

#grayscale! ⇒ Object 



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# File 'lib/honeybii/shaded_ascii.rb', line 21

def grayscale!
  @raw = @raw.quantize(256, Magick::GRAYColorspace)
end

#pixelate! ⇒ Object 



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# File 'lib/honeybii/shaded_ascii.rb', line 25

def pixelate!
  columns = @raw.columns / @point_size
  rows = @raw.rows / (@point_size * 2)
  @raw.resize!(columns, rows)
end

#to_ascii! ⇒ Object 



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# File 'lib/honeybii/shaded_ascii.rb', line 31

def to_ascii!
  grayscale!
  pixelate!

  ascii_array = Array.new(@raw.rows).collect do |row|
    Array.new(@raw.columns)
  end
  
  @raw.each_pixel do |pixel, col, row|
    index = (((@gradient.size - 1) * pixel.intensity).to_f / 65535.to_f).round
    ascii_array[row][col] = @gradient[index]
  end

  @ascii = ascii_array.map { |row| row.join }.join("\n")
end