Class: GameOfLife::Map

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/game_of_life/map.rb

Overview

Represents a 2-dimensional collection of Cells

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(width = 10, height = 10) ⇒ Map

Returns a new instance of Map.



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# File 'lib/game_of_life/map.rb', line 13

def initialize(width=10, height=10)
	@width, @height = width, height	
	@cells = Array.new(@width) { Array.new(@height) { GameOfLife::Cell.new } }
end

Instance Attribute Details

#cells ⇒ Object

Returns the value of attribute cells.



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# File 'lib/game_of_life/map.rb', line 11

def cells
  @cells
end

#height ⇒ Object (readonly)

Returns the value of attribute height.



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# File 'lib/game_of_life/map.rb', line 10

def height
  @height
end

#width ⇒ Object (readonly)

Returns the value of attribute width.



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# File 'lib/game_of_life/map.rb', line 10

def width
  @width
end

Instance Method Details

#[](x, y) ⇒ Object 



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# File 'lib/game_of_life/map.rb', line 18

def [](x,y)
	@cells[y].nil? || y < 0	|| x < 0 ? [] : @cells[y][x]
end

#[]=(x, y, value) ⇒ Object 



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# File 'lib/game_of_life/map.rb', line 22

def []=(x,y, value)
	@cells[y][x] = value
end

#deep_copy ⇒ Object 



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# File 'lib/game_of_life/map.rb', line 89

def deep_copy
	copy_map = self.dup
	copy_map.cells = Marshal.load(Marshal.dump(@cells))	
	copy_map
end

#each(&block) ⇒ Object 



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# File 'lib/game_of_life/map.rb', line 27

def each &block
	@cells.each do |x| 
		x.each do |cell| 
			yield cell
		end
	end
end

#from_s(map) ⇒ Object 



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# File 'lib/game_of_life/map.rb', line 46

def from_s(map)
	return if map.empty?
	new_cells = []
	new_row = []
	map.each_char do |c|
		case c
		when "."
			new_row << GameOfLife::Cell.new(:dead)
		when "#"
			new_row << GameOfLife::Cell.new(:live)
		when "\n"
			new_cells << new_row.dup
			new_row = []
		end
	end
	@cells = new_cells
	@width = new_cells[0].length
	@height = new_cells.size
end

#next_generation ⇒ Object 



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# File 'lib/game_of_life/map.rb', line 66

def next_generation
	next_map = deep_copy
	for y in 0..@height-1 do
		for x in 0..@width-1 do
			neighbors = [self[x-1,y-1],
						 self[x,y-1],
						 self[x+1,y-1],
						 self[x-1,y],
						 self[x+1,y],
						 self[x-1,y+1],
						 self[x,y+1],
						 self[x+1,y+1]].flatten.keep_if { |n| !n.nil? }
			next_map[x,y].update_state neighbors 
		end
	end
	next_map
end

#next_generation! ⇒ Object 



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# File 'lib/game_of_life/map.rb', line 84

def next_generation!
	next_map = next_generation
	@cells = next_map.cells
end

#to_s ⇒ Object 



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# File 'lib/game_of_life/map.rb', line 35

def to_s
	result_string = ""
	@cells.each do |x|
		x.each do |cell|
			result_string += cell.to_s
		end
		result_string += "\n"
	end
	result_string	
end