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class Entity
attr_accessor :id
def initialize(*signature)
final_signature = 0
signature.each do |sig|
final_signature += sig
end
@id = Entity.generate_new_id
self.class.all.push self
self.class.signatures.push final_signature
Components.entity_created(@id)
end
class <<self
# All entities that exist
def all
@all ||= []
end
def id_queue
@id_queue ||= []
end
def generate_new_id
if id_queue.empty?
all.size
else
id_queue.shift
end
end
# What components a given entity uses
def signatures
@signatures ||= []
end
def destroy_entity(entity_id)
if all[entity_id].nil?
puts 'Entity can not be destroyed, id out of bounds'
elsif entity_id < all.size - 1
Components.constants.each do |constant|
unless (signatures[entity_id] & Components::const_get(constant).id).zero?
Components::const_get(constant).delete(entity_id)
end
end
all[entity_id] = nil
signatures[entity_id] = nil
id_queue.push entity_id
elsif entity_id == all.size - 1
Components.constants.each do |constant|
unless (signatures[entity_id] & Components::const_get(constant).id).zero?
Components::const_get(constant).delete(entity_id)
end
end
all.pop
signatures.pop
else
puts 'Unknown error with destroy_entity, entity not destroyed'
end
end
end
end
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