#from slipnode import Slipnode

class Sliplink(object):
	def __init__(self, source, destination, label=None, length=0.0):
		self.source = source
		self.destination = destination
		self.label = label
		self.fixedLength = length
		source.outgoingLinks += [self]
		destination.incomingLinks += [self]

	def degreeOfAssociation(self):
		if self.fixedLength > 0 or not self.label:
			return 100.0 - self.fixedLength
		return self.label.degreeOfAssociation()

	def intrinsicDegreeOfAssociation(self):
		if self.fixedLength > 1:
			return 100.0 - self.fixedLength
		if self.label:
			return 100.0 - self.label.intrinsicLinkLength
		return 0.0

	def spread_activation(self):
		self.destination.buffer += self.intrinsicDegreeOfAssociation()

	def points_at(self, other):
		return self.destination == other