GameOfLife/game_of_life.rb at main · JuttonS/GameOfLife · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
class GameOfLife
  def get_next_grid(current_grid)
    new_grid = current_grid

    new_grid.each_with_index do |row, row_index|
      row.each_with_index do |cell, column_index|
        living_neighbours_count = number_of_living_neighbours(row_index, column_index, new_grid)
        new_state_of_cell(cell, living_neighbours_count)
      end
    end
  end

  def new_state_of_cell(cell, living_neighbours_count)
    if cell == :live && living_neighbours_count < 2
      cell = :dead
    elsif cell == :live && living_neighbours_count > 3
      cell = :dead
    elsif cell == :live && living_neighbours_count == 2
      cell = :live
    elsif cell == :live && living_neighbours_count == 3
      cell == :live
    elsif cell == :dead && living_neighbours_count == 3
      cell = :live
    else
      cell = :dead
    end
  end

  def number_of_living_neighbours(cell_row, cell_column, grid)
    living_neighbours = 0
    if grid[cell_row+1] != nil
      if grid[cell_row+1][cell_column] == :live
        living_neighbours += 1
      end
    end

    if grid[cell_row-1] != nil
      if grid[cell_row-1][cell_column] == :live
        living_neighbours += 1
      end
    end

    if grid[0][cell_column+1] != nil
      if grid[cell_row][cell_column+1] == :live
        living_neighbours += 1
      end
    end

    if grid[0][cell_column-1] != nil
      if grid[cell_row][cell_column-1] == :live
        living_neighbours += 1
      end
    end

    if grid[cell_row-1] != nil && grid[0][cell_column+1] != nil
      if grid[cell_row-1][cell_column+1] == :live
        living_neighbours += 1
      end
    end

    if grid[cell_row+1] != nil && grid[0][cell_column-1] != nil
      if grid[cell_row+1][cell_column-1] == :live
        living_neighbours += 1
      end
    end

    if grid[cell_row-1] != nil && grid[0][cell_column-1] != nil
      if grid[cell_row-1][cell_column-1] == :live
        living_neighbours += 1
      end
    end

    if grid[cell_row+1] != nil && grid[0][cell_column+1] != nil
      if grid[cell_row+1][cell_column+1] == :live
        living_neighbours += 1
      end
    end

    return living_neighbours
  end
end