class Theseus::Formatters::ASCII::Sigma

Renders a SigmaMaze to an ASCII representation, using 3 characters horizontally and 3 characters vertically to represent a single cell.

 _   _   _
/ \_/ \_/ \_
\_/ \_/ \_/ \ 
/ \_/ \_/ \_/
\_/ \_/ \_/ \ 
/ \_/ \_/ \_/
\_/ \_/ \_/ \ 
/ \_/ \_/ \_/
\_/ \_/ \_/ \

You shouldn't ever need to instantiate this class directly. Rather, use SigmaMaze#to(:ascii) (or SigmaMaze#to_s to get the string directly).

Public Class Methods

new(maze, options={}) click to toggle source

Returns a new Sigma canvas for the given maze (which should be an instance of SigmaMaze). The options parameter is not used.

The returned object will be fully initialized, containing an ASCII representation of the given SigmaMaze.

Calls superclass method Theseus::Formatters::ASCII::new
# File lib/theseus/formatters/ascii/sigma.rb, line 26
def initialize(maze, options={})
  super(maze.width * 2 + 2, maze.height * 2 + 2)

  maze.height.times do |y|
    py = y * 2
    maze.row_length(y).times do |x|
      cell = maze[x, y]
      next if cell == 0

      px = x * 2

      shifted = x % 2 != 0
      ry = shifted ? py+1 : py

      nw = shifted ? Maze::W : Maze::NW
      ne = shifted ? Maze::E : Maze::NE
      sw = shifted ? Maze::SW : Maze::W
      se = shifted ? Maze::SE : Maze::E

      self[px+1,ry]   = "_" if cell & Maze::N == 0
      self[px,ry+1]   = "/" if cell & nw == 0
      self[px+2,ry+1] = "\\" if cell & ne == 0
      self[px,ry+2]   = "\\" if cell & sw == 0
      self[px+1,ry+2] = "_" if cell & Maze::S == 0
      self[px+2,ry+2] = "/" if cell & se == 0
    end
  end
end