Noticed something: quickly double-clicking "untangle" for a "concentric" map, causes it to pop out to better fit a widescreen monitor. Nice little side effect.
Yea, one of the adaptations I made to the force-directed approach was to scale the "total bounding rectangle" of the resulting graph down to the actual "official galaxy coordinates" rectangle that the game uses. So the algorithm's model is unaffected, but when its coordinates are applied to the actual planet objects it does that scaling, and it does that at every step of the process, including the first.
So you can actually use it really quickly as a "expand map to fill coordinate area" thing.
Neat. It works really well! Something I've been wanting for some time.