Class: Vamp::Graphic::Transfer

Inherits:
Object
  • Object
show all
Defined in:
lib/vamp/graphic/transfer.rb

Overview

Transfer dotter data into ASCII

Constant Summary collapse

SPACE = 
<<-'END'
___
___
___
END
SLASH = 
<<-'END'
__X
_X_
X__
END
BACKSLASH = 
<<-'END'
X__
_X_
__X
END
BACKTICK = 
<<-'END'
X__
___
___
END
PIPE = 
<<-'END'
_X_
_X_
_X_
END
MINUS = 
<<-'END'
___
XXX
___
END
UNDERSCORE = 
<<-'END'
___
___
XXX
END
FULLSTOP = 
<<-'END'
___
___
_X_
END
DOUBLEQUOTES = 
<<-'END'
X_X
___
___
END
SINGLEQUOTE = 
<<-'END'
_X_
___
___
END
STAR = 
<<-'END'
_X_
XXX
_X_
END
HASH = 
<<-'END'
XXX
XXX
XXX
END

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(context) ⇒ Transfer

Returns a new instance of Transfer.



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# File 'lib/vamp/graphic/transfer.rb', line 83

def initialize(context)
  @context = context
  @char_width = 3
  @char_height = 3
  @mapping = {
      " "  => create_pattern(SPACE),
      "/"  => create_pattern(SLASH),
      "\\" => create_pattern(BACKSLASH),
      "`"  => create_pattern(BACKTICK),
      "|"  => create_pattern(PIPE),
      "-"  => create_pattern(MINUS),
      "_"  => create_pattern(UNDERSCORE),
      "."  => create_pattern(FULLSTOP),
      "\"" => create_pattern(DOUBLEQUOTES),
      "'"  => create_pattern(SINGLEQUOTE),
      "*"  => create_pattern(STAR),
      "\#" => create_pattern(HASH),
  }
end

Instance Attribute Details

#char_height ⇒ Object (readonly)

Returns the value of attribute char_height.



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# File 'lib/vamp/graphic/transfer.rb', line 7

def char_height
  @char_height
end

#char_width ⇒ Object (readonly)

Returns the value of attribute char_width.



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# File 'lib/vamp/graphic/transfer.rb', line 6

def char_width
  @char_width
end

#context ⇒ Object (readonly)

Returns the value of attribute context.



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# File 'lib/vamp/graphic/transfer.rb', line 8

def context
  @context
end

#mapping ⇒ Object (readonly)

Returns the value of attribute mapping.



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# File 'lib/vamp/graphic/transfer.rb', line 9

def mapping
  @mapping
end

Instance Method Details

#ascii ⇒ Object 



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# File 'lib/vamp/graphic/transfer.rb', line 158

def ascii
  a = ""
  (context.height / char_height).times do |y|
    (context.width / char_width).times do |x|
      a += get_matching(get_pattern(x * char_width, y * char_height))
    end
    a += "\n"
  end
  a.chomp
end

#create_data(pattern) ⇒ Object 



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# File 'lib/vamp/graphic/transfer.rb', line 103

def create_data(pattern)
  a = pattern.split("\n")
  fail "pattern has wrong height" if a.size != char_height
  char_height.times do |dy|
    fail "pattern has wrong width" if a[dy].size != char_width
  end
  a
end

#create_pattern(pattern) ⇒ Object 



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# File 'lib/vamp/graphic/transfer.rb', line 112

def create_pattern(pattern)
  char = TextDotter.new(char_width, char_height)
  a = create_data(pattern)
  char_height.times do |y|
    char_width.times do |x|
      char.dot(x, y) if a[y][x] == "X"
    end
  end
  char
end

#difference(pattern1, pattern2) ⇒ Object 



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# File 'lib/vamp/graphic/transfer.rb', line 138

def difference(pattern1, pattern2)
  m = 0
  char_width.times do |dx|
    char_height.times do |dy|
      m += 1 if pattern1.dot?(dx, dy) != pattern2.dot?(dx, dy)
    end
  end
  m
end

#get_matching(pattern) ⇒ Object 



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# File 'lib/vamp/graphic/transfer.rb', line 148

def get_matching(pattern)
  ranking = {}
  mapping.each do |k, v|
    r = difference(pattern, v)
    ranking[k] = r
  end
  ranking.min_by{|k, v| v}[0]
end

#get_pattern(x, y) ⇒ Object 



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# File 'lib/vamp/graphic/transfer.rb', line 123

def get_pattern(x, y)
  pattern = ""
  char_height.times do |dy|
    char_width.times do |dx|
      if context.in?(x + dx, y + dy)
        pattern += (context.dot?(x + dx, y + dy) ? "X" : "_")
      else
        pattern += "_"
      end
    end
    pattern += "\n"
  end
  create_pattern(pattern.strip)
end