Class: Wiper::Squeegee

Inherits:
Object
  • Object
show all
Defined in:
lib/wiper/squeegee.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize {|_self| ... } ⇒ Squeegee

Returns a new instance of Squeegee.

Yields:

  • (_self)

Yield Parameters:



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# File 'lib/wiper/squeegee.rb', line 5

def initialize
  @grid = [[0] * 45] * 7
  @direction = :east
  @curtain = false
  @interval = 0.1
  @index = 0
  @limit = 45

  yield self if block_given?
end

Instance Attribute Details

#curtain ⇒ Object

Returns the value of attribute curtain.



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# File 'lib/wiper/squeegee.rb', line 3

def curtain
  @curtain
end

#direction ⇒ Object

Returns the value of attribute direction.



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# File 'lib/wiper/squeegee.rb', line 3

def direction
  @direction
end

#grid ⇒ Object

Returns the value of attribute grid.



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# File 'lib/wiper/squeegee.rb', line 3

def grid
  @grid
end

#interval ⇒ Object

Returns the value of attribute interval.



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# File 'lib/wiper/squeegee.rb', line 3

def interval
  @interval
end

Instance Method Details

#each ⇒ Object 



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# File 'lib/wiper/squeegee.rb', line 37

def each
  while @index < @limit
    wipe
    yield @grid
  end
end

#wipe ⇒ Object 



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# File 'lib/wiper/squeegee.rb', line 21

def wipe
  @grid.transpose! if [:north, :south].include? @direction
  @grid.map do |row|
    row.reverse! if [:north, :west].include? @direction
    row[@index] = 1 if @index < row.length
    unless curtain
      row[@index - 1] = 0 if @index > 0
    end
    row.reverse! if [:north, :west].include? @direction
  end
  @grid.transpose! if [:north, :south].include? @direction
  @grid.interval = @interval

  @index += 1
end