alternative_map.rb

class Map
  TileSetPath = "../data/graphics/texturepack_dungeon.png"
  TileSetSize = 32

  def initialize(f_map)
    puts "Loading map from #{f_map}.."

    @tileset   = Gosu::Image.load_tiles(TileSetPath, TileSetSize, TileSetSize)
    @tile_size = TileSetSize
    @tiles     = File.readlines(f_map, chomp: true).map.with_index { |line, y|
      line.chars.each_slice(2).map.with_index { |(char, _), x|
        Tile.new(x * @tile_size, y * @tile_size, @tileset, char)
      }
    }
    @width  = @tiles.first.size
    @height = @tiles.size
    
    puts "\n" + 'width: ' + @width.to_s + ', height: ' + @height.to_s
    puts 'Test data: ' + @tiles[0, 1].get_code
  end

  def tile_at(x, y)
    @tiles.dig(y, x)
  end

  # Render whole map
  def draw
    @tiles.each do |row|
      row.each(&:draw)
    end
  end
end