Class: MazeBTrace

Inherits:
Maze
  • Object
show all
Defined in:
lib/maze/maze_btrace.rb

Instance Attribute Summary

Attributes inherited from Maze

#height, #height_full, #matrix, #mirrored, #width, #width_full

Instance Method Summary collapse

Methods inherited from Maze

#cell, #hash, #inspect, #print, #value, #xy_to_ij

Constructor Details

#initialize(width, height) ⇒ MazeBTrace

Returns a new instance of MazeBTrace.



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# File 'lib/maze/maze_btrace.rb', line 11

def initialize(width, height)
	super(width, height)
end

Instance Method Details

#between_cells(cell_a, cell_b) ⇒ Object 



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# File 'lib/maze/maze_btrace.rb', line 15

def between_cells(cell_a, cell_b)
	i_a, j_a = xy_to_ij(cell_a.x, cell_a.y)
	i_b, j_b = xy_to_ij(cell_b.x, cell_b.y)
	[(i_a + i_b).abs / 2, (j_a + j_b).abs / 2]
end

#generate ⇒ Object 



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# File 'lib/maze/maze_btrace.rb', line 21

def generate
	super
	stack = []
	visited_cells = []
	all_index_cells = []
	current_cell = cell(rand(@width), rand(@height))
	visited_cells.push current_cell
	(0...@width).each do |x|
		(0...@height).each do |y|
			all_index_cells << [x, y]
		end
	end
	while visited_cells.size != @width * @height
		neighbours = current_cell.neighbours
		visited_cells.push current_cell
		unvisited_neighbours = (neighbours - visited_cells)
		if !unvisited_neighbours.empty?
			stack.push current_cell
			random_neighbour = unvisited_neighbours.shuffle.shift
			i, j = xy_to_ij(random_neighbour.x, random_neighbour.y)
			inner_i, inner_j = between_cells(current_cell, random_neighbour)
			@matrix[inner_i][inner_j] = 0
			current_cell = random_neighbour
			visited_cells.push current_cell
		elsif !stack.empty?
			current_cell = stack.pop
		else
			unvisited_index_cells = all_index_cells - visited_cells.map { |c| [c.x, c.y] }
			unvisited_index_cell = unvisited_index_cells.shuffle.shift
			current_cell = cell(unvisited_index_cell[0], unvisited_index_cell[0])
			visited_cells.push current_cell
		end
		visited_cells.uniq!
	end
	self
end