Factorio Forums

mrzorn wrote:Edit:

Wups
viewtopic.php?f=6&t=39474&p=251161&hili ... rt#p251161

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Hi there!

I have this brainchild I'm thinking about since a few weeks. I want to setup a train for my outposts to supply my roboports there, outside of the reach of the "Mainbase"-Network, with the Items that are requested locally.

As far as I can see there is no way to read from a Roboport what is currently "missing" within the network.

So if it would be possible to Output from a Roboport with wire not only the Items that are available but also the Items that are currently requested (via chests or blueprints) with a negative value.

I would think the result to be like this:

Yell. Belt: + (In store 100) - (Need 00) = Output + 100 Yellow Belt
Red Belt: + (In store 050) - (Need 20) = Output + 30 Red Belt
Blue Belt: + (In store 000) - (Need 10) = Output - 10 Blue Belt

Slimey wrote:
I have tried this solution before:

*Build a Constant combinator and set the stuff (and amount) you want/need in the outpost. I think the amount should be negative for my setup to work.
*Connect the output to the input of a decider combinator. Setup should be Input:"each < 0" Output: "Each".
*A roboport should output the logistic storage values to the input of the decider combinator.
*At the station, build provider chests and filter inserters set to "set filter mode". Connect the filter inserters to the output of the decider combinator.

If I managed to explain this right the inserters would grab the stuff you need from the supply train until it reaches your desired value.
The design can probably be improved. More than one inserter/wagon can result in too many items transferred since they grab one stack each.

mrzorn wrote:I see how this could work but an option to take the 'requests' from the Roboport directly would benifit this idea of an universal, modular and semi-self building blueprint collection for outposts

mattj256 wrote: There's a difference between an unsatisfied construction/logistic request (where something can't be built because the materials are missing), versus you want to stock an outpost with an arbitrary amount of certain supplies. For the first type of problem I could imagine a generic solution. For the second type of problem you'll need to set up a circuit network and hook up a constant combinator with your desired supply levels.

• It looks like the building queue is never exposed to the Lua api anywhere, so the mod would have to keep track of the placed ghosts itself, potentially causing some performance issues. I think it should be possible to build these maps incrementally, using on_robot_built_entity, on_pre_ghost_deconstructed, on_player_setup_blueprint, ..., but that brings us to
• When two robot networks merge, the corresponding ghost maps should be merged as well, that's not an issue. When two networks split however, the incremental approach breaks down, the mod would have to rescan all affected ghost entities.

gheift wrote:There is an old mod, but I haven't looked into it: https://mods.factorio.com/mod/ConstructionCombinator

-- Known limitations:
--  * Modules disappear from signal when the ghost is built
--	* Deconstructing a ghost before it's built with the deconstruction planner 
--		does not remove it from the signal until another update is triggered
--		as there does not seem to be an event fired when this happens

whitecold wrote:If anyone is interested in this behavior, I made a mod that adds a combinator that performs exactly this. (I am afraid I have no clue how to hack into the roboport)

https://mods.factorio.com/mod/missing-circuit

Shaftoe wrote:This! I want this (the OP request, not the musings afterwords) - Roboports should report negative values for the things they need for the constructors but don't have, OR, barring that, it should be a select-able toggle akin to 'read logistic network contents' or 'read robot statistics'.

I have a beautiful Logistic Train Network setup that has variable input-output stations distributed across the map, but i can't ask for trains to get loaded up with building supplies in an automated way because i can't input those requests into the network via any means i can figure out.