Merge pull request #249 from fuksito/develop

Sample game of life on shoes

samples/expert-game-of-life.rb

@@ -0,0 +1,243 @@
+# Simple Game of Life with Shoes
+# by fuksito
+# vitaliy@yanchuk.me
+
+
+class Cell
+  WIDTH = 15
+  attr_accessor :live, :next_state, :y, :x, :neighbours, :live_neighbours, :app, :shoes_cell
+
+  def initialize(y, x, app, world)
+    @live = false
+    @next_state = false
+    @y = y
+    @x = x
+    @app = app
+    @world = world
+    @shoes_cell = @app.rect(left: WIDTH * y, top: WIDTH * x, width: WIDTH)
+    @shoes_cell.click{ toggle_state }
+  end
+
+  def live?
+    @live
+  end
+
+  def dead?
+    !@live
+  end
+
+  def die!
+    @next_state = false
+    @world.changed_cells.push(self)
+  end
+
+  def alive!
+    @next_state = true
+    @world.changed_cells.push(self)
+  end
+
+  def toggle_state
+    @next_state = !@live
+    set_next_state
+    draw
+  end
+
+  def set_next_state
+    if @live = @next_state
+      @world.live_cells.push(self)
+    else
+      cell_index = @world.live_cells.index(self)
+      if cell_index
+        @world.live_cells.delete_at(cell_index)
+      end
+    end
+  end
+
+  def draw
+    @shoes_cell.style(fill: live? ? '#000' : '#fff')
+  end
+
+  def iterate
+    live_cells_count = @neighbours.count{|c| c.live? }
+    if live?
+      if live_cells_count < 2 || live_cells_count > 3
+        die!
+      end
+    else
+      if live_cells_count == 3
+        alive!
+      end
+    end
+  end
+end
+
+class World
+  attr_accessor :board, :width, :height, :live_cells, :changed_cells
+
+  def initialize(width, height, app)
+    @board = []
+    @width = width
+    @height = height
+    @app = app
+    @live_cells = []
+    @changed_cells = []
+    create_board
+  end
+
+  def create_board
+    @height.times do |y|
+      @board[y] = []
+      @width.times do |x|
+        @board[y][x] = Cell.new(y, x, @app, self)
+      end
+    end
+    cells.each do |cell|
+      cell.neighbours = cell_neighbours(cell.y, cell.x)
+    end
+    draw
+  end
+
+  def cells
+    @cells ||= @board.flatten
+  end
+
+  def actual_cells
+    (@live_cells.map(&:neighbours).flatten + @live_cells).uniq
+  end
+
+  def draw
+    cells.each{|c| c.draw }
+  end
+
+  def tick
+    @changed_cells = []
+    actual_cells.each{|c| c.iterate }.each{|c| c.set_next_state }
+    @changed_cells.each{|c| c.draw }
+  end
+
+  def clear
+    live_cells.each do |cell|
+      cell.live = false
+      cell.next_state = false
+      cell.draw
+    end
+  end
+
+  def cell_neighbours(y,x)
+    result = []
+    top_row = y - 1
+    left_col = x - 1
+    right_col = x + 1
+    bottom_row = y + 1
+
+    if top_row >= 0 && left_col >= 0
+      result << @board[y-1][x-1]
+    end
+
+    if top_row >= 0
+      result << @board[y-1][x]
+    end
+
+    if top_row >= 0 && right_col < @width
+      result << @board[y-1][x+1]
+    end
+
+    if left_col >= 0
+      result << @board[y][x-1]
+    end
+
+    if right_col < @width
+      result << @board[y][x+1]
+    end
+
+    if bottom_row < @height && left_col >= 0
+      result << @board[y+1][x-1]
+    end
+
+    if bottom_row < @height
+      result << @board[y+1][x]
+    end
+
+    if bottom_row < @height && right_col < @width
+      result << @board[y+1][x+1]
+    end
+
+    result.compact
+  end
+
+  def add_specie(*cells)
+    cells.each do |y,x|
+      @board[y][x].toggle_state
+    end
+  end
+
+  def add_glinder
+    add_specie [4,2], [4,3], [4,4], [3,4], [2,3]
+  end
+
+  def add_spaceship
+    add_specie [12,3], [12,6], [13,7], [14,3], [14,7], [15,4], [15,5], [15,6], [15,7]
+  end
+
+  def add_diehard
+    add_specie [18,12], [12,13], [13,13], [13,14], [17,14], [18,14], [19,14]
+  end
+end
+
+Shoes.app(title: "The Game of Life", width: 800, height: 620, resizable: false) do
+  background white
+  @animate = false
+  stack(margin: 10) do |board_holder|
+    @new_world = World.new(40, 40, self)
+    animate(10) do |frame|
+      if @animate
+        @new_world.tick
+      end
+    end
+  end
+
+  def play
+    @animate = true
+    @run_button.style(displace_top: -100)
+    @stop_button.style(displace_top: 0)
+  end
+
+  def stop
+    @animate = false
+    @stop_button.style(displace_top: -100)
+    @run_button.style(displace_top: 0)
+  end
+
+  def clear
+    stop
+    @new_world.clear
+  end
+
+  flow(displace_left: 650) do
+    @run_button  = button('Run',  displace_top: 0,                         width: 100){ play }
+    @stop_button = button('Stop', displace_top: -100, displace_left: -100, width: 100){ stop }
+  end
+
+  stack(displace_left: 650) do
+    button('Clear', width: 100) do
+      clear
+    end
+
+    para "Species"
+    button('Glinder', width: 100) do
+      clear
+      @new_world.add_glinder
+    end
+
+    button('Spaceship', width: 100) do
+      clear
+      @new_world.add_spaceship
+    end
+
+    button('Diehard', width: 100) do
+      clear
+      @new_world.add_diehard
+    end
+  end
+
+end