shadow.rb

# Sample usage of Ruby recursive shadowcasting implementation:
# http://roguebasin.roguelikedevelopment.org/index.php?title=Ruby_shadowcasting_implementation

require "ShadowcastingFieldOfView"

class Map
  def initialize(map)
    @map = map
    @view = Array.new(map.length)
    @view.length.times do |y|
      @view[y] = Array.new(map[y].length)
    end
  end

  def blocked?(x, y)
    @map[y][x] == 1
  end

  def light(x, y)
    @view[y][x] = true
  end

  def to_s
    (0...@view.length).map{ |y| (0...@view[y].length).map{ |x| (x == 5 && y == 5) ? "@" : (@view[y][x] ? (@map[y][x] == 1 ? "#" : ".") : " ") }.join }.join("\n")
  end

  include ShadowcastingFieldOfView
end

m = Map.new([
  [1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
  [1, 0, 0, 0, 0, 0, 0, 0, 0, 1],
  [1, 0, 0, 1, 1, 0, 0, 0, 0, 1],
  [1, 0, 0, 0, 0, 0, 0, 1, 0, 1],
  [1, 0, 0, 0, 0, 0, 0, 1, 0, 1],
  [1, 0, 1, 0, 0, 0, 0, 0, 0, 1],
  [1, 0, 0, 0, 0, 0, 0, 0, 0, 1],
  [1, 0, 0, 0, 0, 0, 1, 1, 0, 1],
  [1, 0, 0, 0, 0, 0, 1, 1, 0, 1],
  [1, 0, 1, 1, 1, 0, 0, 0, 0, 1],
  [1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
])
m.do_fov(5, 5, 10)
puts(m.to_s)