Linked Energy Sources/Script-Controlled Electric Networks

[braxbro]

Hi. I wrote a long preamble for why I'd like this, which is in a spoiler block below for brevity.

TLDR - Linked connections for both items and fluids exist - and for items, have for a while

We've had Linked Belts and Linked Chests for a fair bit. (both were present in 1.1; I don't know how much older than that they are because 1.0 and before were documented on the wiki, and the wiki docs have been removed and redirected to the new API reference, which only covers 1.1 and 2.0)

Both are tremendously useful for both modded cross-surface purposes and various niche custom stuff dealing with compound entities, though internal (pointed inside of the entity's hitbox) fluid connections were arguably a superior, if ugly, alternative at the time for compound entity use cases.

We've also had the (less useful, but still useful) ability to connect power poles by script, ignoring surface/distance restrictions, allowing for the creation of cross-surface power poles for a while as well. (AAI Signal Transmission and notnotmelon's fork of Factorissimo both use this)

In 2.0, we got the 'Linked' connection type for fluid box connections, alleviating the ugliness of internal fluid connections in compound entities, and enabling both more complex compound entities and the creation of linked pipes. We also got vector_to_place_result for all assemblers, furnaces, and rocket silos, (as nonsensical as it might be for the latter) where it was previously limited to mining drills, which can be useful for compound entities by enabling the automatic output of items into other parts of the entity. (though I don't know if it works when the vector is inside of the entity's hitbox...?)

Both of these now make it easier than ever to build compound entities with various behaviors that aren't seen in the base game, significantly raising the ceiling for what mods can do without having to rely on Lua scripting hacks.

As of right now, there are only two aspects (that I can think of) of an entity that can't be linked in this manner: energy sources and heat connections. The latter can be addressed, as far as I know, through 1.1-style internal heat connections for compound entity applications. (but not for pseudo-underground heat pipes or cross-surface heat connections; those in theory can be hacked together with two assemblers creating a dummy fluid and two reactor prototypes consuming it using linked fluid boxes to connect them and a script to disable the reactors above a certain heat cap)

The former cannot. The best you can do right now is integrate a power pole into your compound entity and forbid placing power poles such that their connection area overlaps with the entity, or use linked connections to put all the energy source stuff on another surface. (which doesn't work if one of the components needs to be at the location of the compound entity... such as, say, a lightning rod)

So I propose the creation of a linked energy source type that functions as an electric energy source that only connects via control-stage script. This energy source would be available for prototypes anywhere an electric energy source is available. (maybe it should be a runtime thing or a property of electric energy sources?) For a full list, in case others are unaware, you can look at the api reference for ElectricEnergySources.

This would enable many things that aren't currently feasible without Lua scripting, hopefully in a less intrusive manner than, for example, adding fluid energy sources to entities that can only use void or electric energy inputs, or adding optional fluid/heat outputs to generator prototypes that don't already support them.

Example ideas enabled as compound entities by linked energy sources

• Non-electric beacons which won't be implemented otherwise for performance reasons
• Solars that output heat, steam, or the like (There are a few heat-based solar mods already; this would likely make them more performance friendly.)
• Lightning rods that output heat, steam, or the like (I want to make a steam-based lightning rod that explodes when it gets full!)
• Fusion reactors that output heat, steam or the like (while still properly maintaining a coolant loop; recipes cannot be fully aware of fluid temperature variance without an ungodly number of prototypes)
• Lamps that run on oil/combustibles, I guess?
• Burner/fluid/heat powered roboports (IR3 had steam canister-powered personal roboports; having a steam powered non-personal roboport may be something modders would be interested in)
• Burner/fluid/heat powered logic circuits? Dunno why you'd want that, but... it's there...?
• Burner equivalents to laser/flame turrets, I guess???
• Asteroid collectors that require lubrication???
• Maybe personal grid equipment that runs off of the base's power grid or links to it??? That's kinda a stretch, but still...

Sorry for the huge write-up. I just had a thought and it kept going and going like a clown/magician pulling a chain of handkerchiefs out of their sleeve...

[BraveCaperCat]

It doesn't make any sense for there to not be linked energy sources. I mean, there's already linked belts, linked containers/chests and linked fluid boxes/pipes, why not linked energy connectors? (or linked energy sources, receivers, etc)

[curiosity]

It doesn't make any sense for there to not be linked energy sources. I mean, there's already linked belts, linked containers/chests and linked fluid boxes/pipes, why not linked poles? (or linked energy connectors, sources, etc)

Poles can already be linked. But the OP explicitly explains that poles aren't a solution and why.

Actually, what might help with the OP problem, if not linked energy sources, is electric network categories. Entities from different categories don't connect. It makes the power pole solution viable.

[BraveCaperCat]

It doesn't make any sense for there to not be linked energy sources. I mean, there's already linked belts, linked containers/chests and linked fluid boxes/pipes, why not linked poles? (or linked energy connectors, sources, etc)

Poles can already be linked. But the OP explicitly explains that poles aren't a solution and why.

Actually, what might help with the OP problem, if not linked energy sources, is electric network categories. Entities from different categories don't connect. It makes the power pole solution viable.

When I posted my reply, I hadn't read the actual original post. Instead, I read about it in a few sentences elsewhere, which linked here. Those few sentences (unlike the "quite a lot" amount of sentences used here) didn't explain that linked poles were different from linked energy sources or that they couldn't fulfil the same purposes.

[braxbro]

...

Poles can already be linked. But the OP explicitly explains that poles aren't a solution and why.

Actually, what might help with the OP problem, if not linked energy sources, is electric network categories. Entities from different categories don't connect. It makes the power pole solution viable.

They are a solution, the issue is that the constraints on that solution are terribly awkward to work with and unintuitive for the player overall.

If you don't forbid electric network stuff near the compound machine with the power pole in it, then they may be confused, for example, when they see their boiler lightning rod (which is an idea that I had for a mod I intend to make that this would facilitate) drawing a ridiculous amount of energy because their power poles were placed too close. And if you do, you make it terribly inconvenient to work around the compound entity, which sucks.

Having the ability to set electric network 'layers' of sorts would also fulfill this feature request, though, you are right. (Hell, even just being able to override electric network connections for electric energy sources directly would cover it, tbh.)

[BraveCaperCat]

...

Poles can already be linked. But the OP explicitly explains that poles aren't a solution and why.

Actually, what might help with the OP problem, if not linked energy sources, is electric network categories. Entities from different categories don't connect. It makes the power pole solution viable.

They are a solution, the issue is that the constraints on that solution are terribly awkward to work with and unintuitive for the player overall.

If you don't forbid electric network stuff near the compound machine with the power pole in it, then they may be confused, for example, when they see their boiler lightning rod (which is an idea that I had for a mod I intend to make that this would facilitate) drawing a ridiculous amount of energy because their power poles were placed too close. And if you do, you make it terribly inconvenient to work around the compound entity, which sucks.

Having the ability to set electric network 'layers' of sorts would also fulfill this feature request, though, you are right. (Hell, even just being able to override electric network connections for electric energy sources directly would cover it, tbh.)

What if you made a power pole with a connection radius of 0 and a supply area of 1? (or more if that's not enough, it just needs to be able to cover the combined entity)

[curiosity]

What if you made a power pole with a connection radius of 0 and a supply area of 1? (or more if that's not enough, it just needs to be able to cover the combined entity)

It's not the power pole that's the problem, it's every other power pole with its own supply area.

[braxbro]

...

What if you made a power pole with a connection radius of 0 and a supply area of 1? (or more if that's not enough, it just needs to be able to cover the combined entity)

Entities can connect to multiple electric networks at once, and have no means of prioritizing between the two. This can be most easily seen by placing accumulators bridging two disconnected power networks; they serve as a sort of flow control for power between the two networks as one network charges them and the other draws from them. The receiving network(s) can never receive more than the accumulators can discharge, and the charging network(s) can never contribute more than the accumulators can accept.

[protocol_1903]

+1, I've run into similar issues with compound entities that a generic linked energy source like the one mentioned would solve

[BraveCaperCat]

...

What if you made a power pole with a connection radius of 0 and a supply area of 1? (or more if that's not enough, it just needs to be able to cover the combined entity)

Entities can connect to multiple electric networks at once, and have no means of prioritizing between the two. This can be most easily seen by placing accumulators bridging two disconnected power networks; they serve as a sort of flow control for power between the two networks as one network charges them and the other draws from them. The receiving network(s) can never receive more than the accumulators can discharge, and the charging network(s) can never contribute more than the accumulators can accept.

Yeah, I'm not very good with control scripting. Or electricity management. (best I can do is set a reactor to stop receiving nuclear fuel when it has too high a temperature or there's already fuel)