curtag = 0
for edge in mesh:
	if edge is creased:
		edge.v1.someflag = curtag
		edge.v2.someflag = curtag
		curtag+= 1

done = 0
while(!done):
	done = 1	
	for edge in mesh:
		if edge is creased:
			if edge.v1.someflag < edge.v2.someflag:
				edge.v2.someflag = edge.v1.someflag
				done = 0
			else if edge.v2.someflag < edge.v1.someflag:
				edge.v1.someflag = edge.v2.someflag
				done = 0