Stargate Iris
The iris is a metal covering on the Earth Stargate which is used to screen incoming traffic.
When the iris is closed, it forms a barrier less than three μm from the wormhole’s event horizon, thereby preventing most forms of matter from properly reintegrating.
Source: stargate.fandom.com
Stargate is a gateway to other worlds, hiding many things to discover but also many dangers.
Surely, you don’t want any uninvited visitors; there is a very democratic way of preventing such occurrences – build a wall and let every visitor smash into it, and by the wall, I mean the iris.
Iris types
Naquadah Alloy iris
naquadah_alloy_iris
Steel iris
steel_iris
Copper iris
copper_iris
Iron iris
iron_iris
Golden iris
golden_iris
Diamond iris
diamond_iris
Netherite iris
netherite_iris
Bronze iris
bronze_iris
Crafting
You will need a Stargate shielding ring first to craft an iris, which you can craft with four iron ingots and four redstone dusts.
Then, you can use the ring in the middle of the crafting table and surround it with a material for the iris type.
Setting up
Once you have an iris, you can install it into any Stargate with right-click (except for Tollan Stargate, which is too thin for an iris installation).
Only a single iris can be installed on the gate at the time. To remove the iris from the gate or replace it with another one, you must close and break it.
Controlling
Ensure all your stuff controlling the gate (the redstone circuit and related) is in the same chunk as the gate itself. Otherwise, when an incoming connection to the gate loads the remote chunk, anything outside the gate’s chunk will not be loaded, so that it won’t work.
Also, do not use pistons in the redstone circuits. Pistons and similar mechanics will not work when the gate loads the chunk.
Manual control
In some future release, an option to control the iris with computers will be added
Currently, it’s only possible to control the iris with redstone, using the basic interface.
Additionally, you can use a Garage Door Opener (GDO) to open the iris remotely.
If you don’t know redstone well, pay attention to each block and its direction, comparators and repeaters don’t work both ways.
First, you need to set up the basic interface in the shielding mode (not that other interfaces can’t be used yet).
Stargate Network / Stargate Interface / Shielding mode
Basic setup with a lever control
For controlling the iris with a single lever, we need to constantly power the interface with a signal of strength 7 or lower.
That is required to close the iris whenever the lever is turned off. Then simply powering the interface with a signal of strength 8 or more will open the iris.
There are, of course, plenty of ways how to do it, here are two examples.
The simple way using a lever and redstone torch. The torch emits a signal of strength 15, the left path is 9 blocks long. Redstone loses a level for each block, leaving the interface with signal strength 7 (which is the largest strength level that closes the iris). The direct way from lever has a length of 4 blocks, providing signal strength 12 when lever is switched on (any signal above 7 will work).
Note that the length of redstone is critical here.
More minimalistic way
The redstone torch emits signal strength 15. The right path loses two levels, providing the comparator with signal strength 13 from the side. The comparator is set to the subtraction mode outputting signal strength 2. The lever provides signal strength 15 using the repeater, which is more than two from the comparator, and so iris is opened once the lever is switched on.
Automatic iris closing
What if you wanted the iris to automatically open for outgoing connections, so you can use the gate, and closed for incoming connections reflecting any uninvited visitors, unless opened with a lever?
It is indeed possible with a very simple setup.
Using an interface in the wormhole mode will provide appropriate signal strength for the interface in the iris mode to automatically open/close the iris based on the connection direction.
During an incoming connection, the iris can be easily opened with a redstone signal of strength 8 or higher.
You can also instruct the iris to automatically open when there is no connection.
Remote iris control
So you have secured the gate with an auto-closing iris for incoming connection, but how you can open the iris when you are on the other side of the connection?
Garage Door Opener (GDO) is a hand-held device that allows to send a signal through the Stargate connection to the other side. For example, automatically opening the iris.