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Tile = Struct.new(:pos, :up, :right, :down, :left)
class Maze
attr_reader :width
attr_reader :height
def initialize(width, height)
@width = width
@height = height
@h_walls = Array.new(@width) { Array.new(@height + 1, true) }
@v_walls = Array.new(@width + 1) { Array.new(@height, true) }
end
def inBounds?(pos)
x = pos.x
y = pos.y
x >= 0 && y >= 0 && x < @width && y < @height
end
def get(pos)
raise IndexError unless inBounds?(pos)
x = pos.x
y = pos.y
Tile.new(pos, @h_walls[x][y], @v_walls[x + 1][y], @h_walls[x][y + 1], @v_walls[x][y])
end
def neighbors(pos)
neighbors = []
[:up, :right, :down, :left].each do |dir|
neighbors.push(pos.move(dir)) if inBounds?(pos.move(dir))
end
neighbors
end
def set(pos, dir, state)
raise IndexError if pos.x >= @width
raise IndexError if pos.y >= @height
case dir
when :up
@h_walls[pos.x][pos.y] = state
when :right
@v_walls[pos.x + 1][pos.y] = state
when :down
@h_walls[pos.x][pos.y + 1] = state
when :left
@v_walls[pos.x][pos.y] = state
end
end
def to_s(prefix='')
drawingField = Array.new(@height * 2 + 1) { " " * (@width * 2 + 1) }
@v_walls.each_index do |x|
@v_walls[x].each_index do |y|
next if @v_walls[x][y] == false
drawingField[y * 2][x * 2] = "█"
drawingField[y * 2 + 1][x * 2] = "█"
drawingField[y * 2 + 2][x * 2] = "█"
end
end
@h_walls.each_index do |x|
@h_walls[x].each_index do |y|
next if @h_walls[x][y] == false
drawingField[y * 2][x * 2] = "█"
drawingField[y * 2][x * 2 + 1] = "█"
drawingField[y * 2][x * 2 + 2] = "█"
end
end
drawingField.map { |line| prefix + line }.join("\n")
end
end
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