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Contents
module Imageable extend Trait
class ImageMissingError < RuntimeError
def initialize
super <<-MESSAGE
In an Imageable, you either need to define method
image path, *args
for an unchanging image
or
sequenced_image path, width, height, frequency = 10, &block
for a sprite sequence.
MESSAGE
end
end
def self.included klass
klass.extend ClassMethods
end
def initialize window
raise ImageMissingError.new unless self.respond_to? :image
super window
end
module ClassMethods
def image path, *args
InitializerHooks.register self do
@image = Gosu::Image.new self.window, File.join(Resources.root, path), *args
end
define_method :image do
@image
end
end
def sequenced_image path, width, height, frequency = 10, &block
InitializerHooks.register self do
@image_sequence_started = Time.now
@image = Gosu::Image::load_tiles self.window, File.join(Resources.root, path), width, height, false
end
# divider = 1000 / frequency
define_method :image do
@image[(block ? block : lambda { (Time.now - @image_sequence_started)*frequency % @image.size })[]]
end
end
end
end
Version data entries
11 entries across 11 versions & 1 rubygems