Number: 1589
Title: Rank alignment incorrectly influenced when is ranksep under .25
Submitter: Pander
Date: Tue Mar 3 06:31:34 2009
Subsys: Dot
Version: 2.21.20090302.1418
System: *-*-
Severity: minor
Problem: The rank alignment is incorrectly influenced when is ranksep gets under .25 See the enclosed example. When in this example ranksep is set to .25 or higher the rank alignment is correct again. Any value under .25 results in this extra vertical spacing because of the two smaller cluster's bottoms.
Input: 
digraph "test" {
node [shape="box" ]
edge [arrowhead="none" ]
ranksep=.125

subgraph cluster_a {
	a1 -> a2 -> a3
}
subgraph cluster_b {
	b1 -> b2
}
subgraph cluster_c {
	c1 -> c2 -> c3
}
subgraph cluster_d {
	d1 -> d2 -> d3 -> d4
}
}
Owner: *
Status: *