Class: Vida::Grid

Inherits:
Object
  • Object
show all
Defined in:
lib/vida/grid.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args = {}) ⇒ Grid

Returns a new instance of Grid.



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# File 'lib/vida/grid.rb', line 4

def initialize(args = {})
  @rows       = args.fetch(:rows, 50)
  @columns    = args.fetch(:columns, 50)
  @elements   = Array.new(rows) do |row|
    Array.new(columns) do |column|
      Vida::Cell.new(x: column, y: row, alive: random_status)
    end
  end
  @generation_number = 0
end

Instance Attribute Details

#columns ⇒ Object (readonly)

Returns the value of attribute columns.



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# File 'lib/vida/grid.rb', line 2

def columns
  @columns
end

#elements ⇒ Object (readonly)

Returns the value of attribute elements.



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# File 'lib/vida/grid.rb', line 2

def elements
  @elements
end

#rows ⇒ Object (readonly)

Returns the value of attribute rows.



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# File 'lib/vida/grid.rb', line 2

def rows
  @rows
end

Instance Method Details

#live_cells_around(cell) ⇒ Object 



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# File 'lib/vida/grid.rb', line 15

def live_cells_around(cell)
  cells = []
  cells << [
    north(cell),
    south(cell),
    west(cell),
    east(cell),
    ul_corner(cell),
    ur_corner(cell),
    dl_corner(cell),
    dr_corner(cell)
  ]
  cells.flatten!.count { |c| !c.nil? && c.alive == true }
end

#update_cells ⇒ Object 



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# File 'lib/vida/grid.rb', line 30

def update_cells
  elements.each do |column|
    column.each do |element|
      element.update_status(live_cells_around(element))
    end
  end
  @generation_number += 1
end