Class: Sokoban1::Sokoban

Inherits:
Object
  • Object
show all
Defined in:
lib/sokoban/game_engine.rb

Constant Summary collapse

WALL = 
"#"
OPEN_FLOOR = 
" "
MAN = 
"@"
CRATE = 
"o"
STORAGE = 
"."
MAN_ON_STORAGE = 
"+"
CRATE_ON_STORAGE = 
"*"
MAX_UNDO = 
10
PATH = 
File.expand_path(File.dirname(__FILE__))

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file = File.join(PATH, "sokoban_levels.txt")) ⇒ Sokoban

Returns a new instance of Sokoban.



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# File 'lib/sokoban/game_engine.rb', line 34

def initialize( file = File.join(PATH, "sokoban_levels.txt") )
  @level_file = file

  @board = [ ]
  @level = 0
  @over = false

  @undos = [ ]
  @moves = 0

  load_level
end

Instance Attribute Details

#level ⇒ Object (readonly)

Returns the value of attribute level.



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# File 'lib/sokoban/game_engine.rb', line 21

def level
  @level
end

#moves ⇒ Object (readonly)

Returns the value of attribute moves.



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# File 'lib/sokoban/game_engine.rb', line 21

def moves
  @moves
end

Class Method Details

.load(file = File.join(PATH, "sokoban_saved_game.yaml")) ⇒ Object 



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# File 'lib/sokoban/game_engine.rb', line 23

def self.load( file = File.join(PATH, "sokoban_saved_game.yaml") )
  game = nil

  File.open file do |f|
    game = YAML.load(f)
  end

  game ||= Sokoban.new
  game
end

Instance Method Details

#can_move_down? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sokoban/game_engine.rb', line 47

def can_move_down?( )	can_move? :down		end

#can_move_left? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sokoban/game_engine.rb', line 48

def can_move_left?( )	can_move? :left		end

#can_move_right? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sokoban/game_engine.rb', line 49

def can_move_right?( )	can_move? :right	end

#can_move_up? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sokoban/game_engine.rb', line 50

def can_move_up?( )		can_move? :up		end

#display ⇒ Object 



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# File 'lib/sokoban/game_engine.rb', line 52

def display
  @board.inject("") { |dis, row| dis + row.join + "\n" }
end

#level_solved? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sokoban/game_engine.rb', line 56

def level_solved?
  @board.each_with_index do |row, y|
    row.each_with_index do |cell, x|
      return false if cell == CRATE
    end
  end
  true
end

#load_level(level = @level += 1, file = @level_file) ⇒ Object 



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# File 'lib/sokoban/game_engine.rb', line 65

def load_level( level = @level += 1, file = @level_file )
  loaded = false

  File.open file do |f|
    count = 0
    while lvl = f.gets("")
      count += 1
      if count == level
        @board = [ ]
        lvl.chomp!
        lvl.each_line { |e| @board << e.chomp.split("") }
        loaded =  true
        break
      end
    end
  end

  if loaded
    @undos = [ ]
    @moves = 0
  else
    @over = true
  end

  loaded
end

#move_down ⇒ Object 



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# File 'lib/sokoban/game_engine.rb', line 92

def move_down( )	move :down		end

#move_left ⇒ Object 



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# File 'lib/sokoban/game_engine.rb', line 93

def move_left( )	move :left		end

#move_right ⇒ Object 



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# File 'lib/sokoban/game_engine.rb', line 94

def move_right( )	move :right	end

#move_up ⇒ Object 



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# File 'lib/sokoban/game_engine.rb', line 95

def move_up( )		move :up		end

#over? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sokoban/game_engine.rb', line 97

def over?
  @over
end

#restart_level ⇒ Object 



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# File 'lib/sokoban/game_engine.rb', line 101

def restart_level
  load_level @level
end

#save(file = File.join(PATH, "sokoban_saved_game.yaml")) ⇒ Object 



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# File 'lib/sokoban/game_engine.rb', line 105

def save( file = File.join(PATH, "sokoban_saved_game.yaml") )
  File.open(file, "w") do |f|
    f << YAML.dump(self)
  end
end

#undo ⇒ Object 



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# File 'lib/sokoban/game_engine.rb', line 111

def undo
  if @undos.size > 0
    @board = @undos.pop
    @moves -= 1
  end
end