Class: BehaviorTree::ControlNodeBase

Inherits:
NodeBase
  • Object
show all
Includes:
NodeIterators::AllNodes, NodeIterators::PrioritizeRunning
Defined in:
lib/behavior_tree/control_nodes/control_node_base.rb

Overview

A node that has children (abstract class).

Direct Known Subclasses

Selector, Sequence

Class Method Summary collapse

Instance Method Summary collapse

Methods included from NodeIterators::AllNodes

#all_nodes

Methods included from TreeStructure::Algorithms

#cycle?, #each_node, #repeated_nodes, #uniq_nodes?

Constructor Details

#initialize(children = []) ⇒ ControlNodeBase

Returns a new instance of ControlNodeBase.

Raises:



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# File 'lib/behavior_tree/control_nodes/control_node_base.rb', line 11

def initialize(children = [])
  raise IncorrectTraversalStrategyError, nil.class if traversal_strategy.nil?
  raise IncorrectTraversalStrategyError, traversal_strategy unless respond_to?(traversal_strategy, true)

  super()
  @children = children
end

Class Method Details

.traversal_strategy ⇒ Object 



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# File 'lib/behavior_tree/control_nodes/control_node_base.rb', line 71

def traversal_strategy
  @traversal_strategy ||= ancestors.find do |constant|
    next if constant == self
    next unless constant.is_a? Class
    next unless constant.respond_to? :traversal_strategy
    next if constant.traversal_strategy.nil?

    break constant.traversal_strategy
  end
end

Instance Method Details

#<<(child) ⇒ Object 



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# File 'lib/behavior_tree/control_nodes/control_node_base.rb', line 19

def <<(child)
  @children << child
  @children.flatten! # Accepts array of children too.
  @children.map!(&:chainable_node)
end

#halt! ⇒ Object 



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# File 'lib/behavior_tree/control_nodes/control_node_base.rb', line 25

def halt!
  validate_non_leaf!

  super

  @children.each(&:halt!)
end