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Contents
# When hitpoints are at zero or lower, it calls kill! if available, destroy! else.
#
module Hitpoints extend Trait
# TODO def revive!
#
# Prints an amount of information on these capabilities.
#
manual <<-MANUAL
Defines:
hitpoints <some trait>
Example:
hitpoints 10_000
Call hit(damage = 1) to remove hitpoints. This will call
* hit! if hitpoints are still higher than 0.
* kill!, and if not available, destroy! if hitpoints are lower than 0.
MANUAL
def self.included target_class
target_class.extend ClassMethods
end
module ClassMethods
# Define the amount of hitpoints of the thing.
#
def hitpoints amount
include InstanceMethods
class_inheritable_accessor :prototype_hitpoints
self.prototype_hitpoints = amount
hook = lambda { self.hitpoints = self.class.prototype_hitpoints }
InitializerHooks.register self, &hook
end
end
module InstanceMethods
attr_accessor :hitpoints
# Override to handle hit!
#
def hit!
end
# Hit the thing with that much damage.
#
# hit!-s if hitpoints higher than 0
# kill!-s if lower, or destroy!-s if kill!
# is not available.
#
def hit damage = 1
self.hitpoints -= damage
if self.hitpoints > 0
hit!
else
if respond_to?(:kill!)
kill!
else
destroy!
end
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems