Class: Knossos::Serializer::Bitmask

Inherits:
Object
  • Object
show all
Defined in:
lib/knossos/serializer/bitmask.rb

Constant Summary collapse

NORTH = 
1
EAST = 
2
SOUTH = 
4
WEST = 
8

Instance Method Summary collapse

Instance Method Details

#deserialize(encoded_maze:) ⇒ Object 



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# File 'lib/knossos/serializer/bitmask.rb', line 45

def deserialize(encoded_maze:)
  rows = encoded_maze.length
  columns = encoded_maze.first.length
  grid = Knossos::Grid.new({rows: rows, columns: columns})

  encoded_maze.each_with_index do |cells, row|
    cells.each_with_index do |cell, column|
      current_cell = grid[row, column]

      grid.build_passage(current_cell, grid[row - 1, column]) if (cell & NORTH > 0)
      grid.build_passage(current_cell, grid[row, column + 1]) if (cell & EAST > 0)
      grid.build_passage(current_cell, grid[row + 1, column]) if (cell & SOUTH > 0)
      grid.build_passage(current_cell, grid[row, column - 1]) if (cell & WEST > 0)
    end
  end

  grid
end

#serialize(grid:) ⇒ Object 



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# File 'lib/knossos/serializer/bitmask.rb', line 9

def serialize(grid:)
  encoded_maze = Array.new(grid.columns) { Array.new(grid.rows, 0) }

  grid.each_row do |cells, row|
    cells.each_with_index do |cell, column|
      link_mask = 0

      cell.links.each do |link|
        link_mask |=
          case column <=> link.column
          when -1
            EAST
          when 0
            0
          when 1
            WEST
          end

        link_mask |=
          case row <=> link.row
          when -1
            SOUTH
          when 0
            0
          when 1
            NORTH
          end
        end

      encoded_maze[row][column] = link_mask
    end
  end

  encoded_maze
end