Class: Theseus::Formatters::ASCII::Sigma

Inherits:
Theseus::Formatters::ASCII show all
Defined in:
lib/theseus/formatters/ascii/sigma.rb

Overview

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).

Instance Attribute Summary

Attributes inherited from Theseus::Formatters::ASCII

#height, #width

Instance Method Summary collapse

Methods inherited from Theseus::Formatters::ASCII

#[], #[]=, #to_s

Constructor Details

#initialize(maze, options = {}) ⇒ Sigma

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.



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# 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