Module: Chingu::Helpers::GameObject

Extended by:
Forwardable
Included in:
Console, GameState, Window
Defined in:
lib/chingu/helpers/game_object.rb

Overview

Convenience-methods for classes that hold game objects Mixed into Chingu::Window and Chingu::GameState

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#game_objects ⇒ Object (readonly)

Returns the value of attribute game_objects



34
35
36
 
# File 'lib/chingu/helpers/game_object.rb', line 34

def game_objects
  @game_objects
end

Instance Method Details

#game_objects_of_class(klass) ⇒ Object

Fetch game objects of a certain type/class



46
47
48
 
# File 'lib/chingu/helpers/game_object.rb', line 46

def game_objects_of_class(klass)
  @game_objects.select { |game_object| game_object.is_a? klass }
end

#load_game_objects(options = {}) ⇒ Object

Creates game objects from a Chingu-spezed game objects file (created with game state 'Edit')



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
82
83
 
# File 'lib/chingu/helpers/game_object.rb', line 53

def load_game_objects(options = {})
  file = options[:file] || self.filename + ".yml"
  debug = options[:debug]
  except = Array(options[:except]) || []
  
  require 'yaml'
  
  puts "* Loading game objects from #{file}" if debug
  if File.exists?(file)
    objects = YAML.load_file(file)
    objects.each do |object|
      object.each_pair do |klassname, attributes|
        begin
          klass = Object
          names = klassname.split('::')
          names.each do |name|
            klass = klass.const_defined?(name) ? klass.const_get(name) : klass.const_missing(name)
          end
          unless klass.class == "GameObject" && !except.include?(klass)
            puts "Creating #{klassname.to_s}: #{attributes.to_s}" if debug
            object = klass.create(attributes)
            object.options[:created_with_editor] = true if object.options
          end
        rescue => e
          puts "Couldn't create class '#{klassname}' because: #{e}"
          #raise # I suggest this re-raise the error.
        end
      end
    end
  end
end

#save_game_objects(options = {}) ⇒ Object

Save given game_objects to a file. Hashoptions

:file - a String, name of file to write to, default is current game_state class name. :game_objects - an Array, game objects to save :classes - an Array, save only game objects of theese classes

NOTE: To save a color do: :color => game_object.color.argb



94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
 
# File 'lib/chingu/helpers/game_object.rb', line 94

def save_game_objects(options = {})
  #
  # TODO: Move this to GameObjectList#save ?
  #
  file = options[:file] || "#{self.class.to_s.downcase}.yml"
  game_objects = options[:game_objects]
  classes = options[:classes]
  attributes = options[:attributes] || [:x, :y, :angle, :zorder, :factor_x, :factor_y, :alpha]
  
  require 'yaml'
  objects = []
  game_objects.each do |game_object|
    # Only save specified classes, if given.
    next if classes and !classes.empty? and !classes.include?(game_object.class)
    
    attr_hash = {}
    attributes.each do |attr| 
      begin
      attr_hash[attr] = game_object.send(attr)
      rescue NoMethodError
        # silently ignore attributes that doesn't exist on the particular game object
      end
    end
    objects << {game_object.class.to_s => attr_hash}
  end

  File.open(file, 'w') { |out| YAML.dump(objects, out) }
end