Добромир обнови решението на 29.11.2015 23:22 (преди около 9 години)
+module TurtleGraphics
+ class Position < Struct.new(:x, :y)
+ end
+
+ class Orientation < Struct.new(:x, :y)
+ def self.up
+ Orientation.new(0, -1)
+ end
+
+ def self.down
+ Orientation.new(0, 1)
+ end
+
+ def self.right
+ Orientation.new(1, 0)
+ end
+
+ def self.left
+ Orientation.new(-1, 0)
+ end
+ end
+
+ class Turtle
+ def initialize(x, y)
+ @spawned, @plain = false, Canvas::Plain.new(x, y)
+ @orientation, @position = Orientation.right, Position.new(0, 0)
+ end
+
+ def move
+ spawn_at(@position.x, @position.y) if not @spawned
+ x, y = @position.x + @orientation.x, @position.y + @orientation.y
+ new_position = reposition(Position.new(x, y))
+ spawn_at(new_position.x, new_position.y)
+ end
+
+ def turn_left
+ @orientation = Orientation.new(@orientation.y, -1 * @orientation.x)
+ end
+
+ def turn_right
+ @orientation = Orientation.new(-1 * @orientation.y, @orientation.x)
+ end
+
+ def spawn_at(x, y)
+ @spawned = true
+ @position = Position.new(x, y)
+ @plain.visit(@position)
+ end
+
+ def look(orientation)
+ @orientation = Orientation.send(orientation)
+ end
+
+ def draw(canvas = nil, &block)
+ instance_eval(&block) if block_given?
+ if canvas != nil
+ canvas.draw @plain
+ else
+ @plain.plain
+ end
+ end
+
+ private
+
+ def reposition(current_position)
+ if @plain.outside_column?(current_position)
+ Position.new(0, current_position.y)
+ elsif @plain.outside_row?(current_position)
+ Position.new(current_position.x, 0)
+ else
+ current_position
+ end
+ end
+ end
+
+ module Canvas
+ class Plain
+ def initialize(x, y)
+ @rows, @columns = y, x
+ @canvas = []
+ y.times do |row|
+ @canvas[row] = []
+ x.times { |column| @canvas[row][column] = 0 }
+ end
+ end
+
+ def visit(position)
+ @canvas[position.y][position.x] += 1
+ end
+
+ def plain
+ @canvas.map(&:clone).clone
+ end
+
+ def outside_column?(position)
+ position.x >= @columns
+ end
+
+ def outside_row?(position)
+ position.y >= @rows
+ end
+ end
+
+ class ASCII
+ def initialize(symbols)
+ @delta = (Float(1) / Float(symbols.size - 1))
+ @symbols = {}
+ symbols.each_with_index do |symbol, index|
+ @symbols[Range.new((index - 1) * @delta, index * @delta)] = symbol
+ end
+ end
+
+ def draw(plain)
+ drawing = plain.plain.each.map do |row|
+ row.map do |value|
+ representation(intensity(value, plain.plain))
+ end
+ end
+
+ drawing.map(&:join).map {|str| str + "\n"}.join.strip
+ end
+
+ private
+
+ def max_visits(plain)
+ plain.map(&:max).max
+ end
+
+ def intensity(pixel, plain)
+ Float(pixel) / Float(max_visits plain)
+ end
+
+ def representation(intensity)
+ @symbols.each do |range, value|
+ return value if range.include? intensity
+ end
+ end
+ end
+
+ class HTML
+ TEMPLATE = %{
+ <!DOCTYPE html>
+ <html>
+ <head>
+ <title>Turtle graphics</title>
+
+ <style>
+ table {
+ border-spacing: 0;
+ }
+
+ tr {
+ padding: 0;
+ }
+
+ td {
+ width: %spx;
+ height: %spx;
+
+ background-color: black;
+ padding: 0;
+ }
+ </style>
+ </head>
+ <body>
+ <table>
+ %s
+ </table>
+ </body>
+ </html>
+ }
+
+ def initialize(cell_size)
+ @cell_size = cell_size
+ end
+
+ def draw(plain)
+ table = representation(plain).map do |row|
+ "<tr>#{row.join}</tr>"
+ end
+ TEMPLATE % [@cell_size, @cell_size, table.join]
+ end
+
+ private
+
+ def representation(plain)
+ template = "<td style='opacity: %s'></td>"
+ plain.plain.each.map do |row|
+ row.map do |pixel|
+ template % [format("%.2f", intensity(pixel, plain.plain))]
+ end
+ end
+ end
+
+ def max_visits(plain)
+ plain.map(&:max).max
+ end
+
+ def intensity(pixel, plain)
+ Float(pixel) / Float(max_visits plain)
+ end
+ end
+ end
+end
Здравей :)
Ето няколко коментара:
-
Floatне се прави така. Има един метод на всички видове числа, който ги превръща въвFloat - Правиш едно излишно форматиране в
representation. Първо форматираш число като%.2f, после резултата го форматираш като низ. Защо не сложиш директно%.2fвtemplate? - Не ми харесва употребата на
sendвlook. Мога да ти подам някакъв друг символ и то ще го изпълни като метод. Като цяло мисля, че само си усложнил нещата с класаOrientation. Реално не прави нищо, което не може да го направи една константа с подходящо съдържание :)