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Wormhole Junction Proof of Concept

KNOWN BUGS:

This will sometimes cause a crash to desktop loading the map (typically for smaller maps). I suggest using this only on huge (or maybe large) maps to avoid. As soon as I find a way around this issue I will implement it.

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To see it in action (or play with it), launch a game as a custom faction using the mantiocre system initializer for its home system.
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This is a proof of concept for a wormhole junction a la David Weber's Honor Harrington/Honorvese books. In these junctions, a ship is able to travel from any terminus to the central junction or vise-versa, but not directly between terminuses without stopping at the junction first.

Creating the junction would require a single system having wormhole links to several other systems, which is not possible in the current implmentation of Stellaris (wormholes are 1-to-1 on a system level - even if you place multiple wormholes in the same system, they will all connect to the same place).

This is a brute force approach to get around this. I use an event to spawn a system with no hyperlanes near manticore that acts as the junction, and connect it to manticore via wormhole.

Then I use an event to spawn seven systems surrounding that one with no hyperlanes. Each of these systems is one of the "junction vectors"

I then connect the junction vector systems to the junction system with hyperlanes, and add a wormhole to each junction vector system connecting them to wherever they are supposed to lead.

It looks messy on galaxy map view with 8 systems stacked on top of each other, but it works. With this setup, you can defend the entire wormhole junction with a station/fleet at the junction system, because the only way to get from any vector system to any other vector system is through the junction system.
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