Class: Griddle::Point

Inherits:
Struct
  • Object
show all
Includes:
Comparable
Defined in:
lib/griddle/point.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#col ⇒ Object

Returns the value of attribute col

Returns:

  • (Object) —

    the current value of col



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# File 'lib/griddle/point.rb', line 4

def col
  @col
end

#row ⇒ Object

Returns the value of attribute row

Returns:

  • (Object) —

    the current value of row



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# File 'lib/griddle/point.rb', line 4

def row
  @row
end

Instance Method Details

#<=>(point) ⇒ Object

TODO: not sure this is really necessary,

it seemed like a good idea at the time



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# File 'lib/griddle/point.rb', line 9

def <=>(point)
  [row, col] <=> [point.row, point.col]
end

#delta(point) ⇒ Object 



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# File 'lib/griddle/point.rb', line 25

def delta(point)
  Point.new(
    (self.row - point.row).abs,
    (self.col - point.col).abs
  )
end

#move(directions) ⇒ Object 



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# File 'lib/griddle/point.rb', line 45

def move(directions)
  directions.each_pair do |direction, amount|
    amount = amount.to_i

    case direction.to_sym
    when :up
      self.row -= amount
    when :down
      self.row += amount
    when :left
     self.col -= amount
    when :right
     self.col += amount
    end
  end
end

#nil? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/griddle/point.rb', line 17

def nil?
  row.nil? && col.nil?
end

#to_rectangle(point) ⇒ Object

‘point` is used to calculate the width and height

of the new rectangle



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# File 'lib/griddle/point.rb', line 34

def to_rectangle(point)
  d = delta(point)

  Rectangle.new(
    row,
    col,
    d.col + 1,
    d.row + 1
  )
end

#to_s ⇒ Object 



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# File 'lib/griddle/point.rb', line 13

def to_s
  "[#{row}, #{col}]"
end

#zero? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/griddle/point.rb', line 21

def zero?
  row.zero? && col.zero?
end