No, I don't think so. My impression is that currently the API doesn't support Undo in general. It would be nice if this was officially acknowledged.

Oooh, nice! I got it to work. Thank you so much!

Oh, yes, I realized this after reading. But it still gave me a bit of that sinking feeling when I first read it.

The intention was to say "The following might be a terrible idea, but...".

How does it work? Is there any way for mod authors to use it?

Which API calls cause an item to get added to the Undo stack?

This is a terrible idea...

Just a heads up, starting a post in this manner might set the wrong tone. :)

I don't care if it's terrible. The game doesn't seem to offer a clean way of letting mods undo things. The devs give mod authors the silent treatment. So anything that works is a good idea in ...

https://forums.factorio.com/viewtopic.php?p=674901#p674901 doesn't seem to be working. It's a mp4 created by OBS. The local file plays fine in my browser.

Here's the BBCode:

[webm][attachment=0]2025-06-20 17-04-25.mp4[/attachment][/webm]

Couldn't find anything here https://forums.factorio.com ...

Made a mod that does this myself.

I made a mod that adds and removes red and green wires. How do I add undo support?

I found LuaUndoRedoStack , but I don't see a way to add anything to the stack. Is this possible?

The mod defines a selection-tool , similar to https://mods.factorio.com/mod/WideChests. on_event(defines.events.on ...

There's a new feature that leaves red and green wires connected when cutting and pasting entities. This is an amazing QoL improvement over 1.0.

However, it's a little dangerous to use. If the wires go out of reach, they will be silently cut. Or rather, not added back in. There is no user feedback ...

https://mods.factorio.com/mod/power-grid-comb but for circuit wires.

It should leave each network intact, but reconnect wires to the connection point that is closest. I believe this would prevent crossing wires.

Is there any mod out there that does this?

grafik.png



I absolutely love the new decider combinators. I am knee deep in combinators right now, and it's great!
However, creating complex conditions can be tedious.

Suggestion: Add a way to copy-paste and/or duplicate a condition.

Idea: Reuse the Delete button for conditions. When the ...

When clicking on Set constant, a dialog opens with a slider and a text edit.

Please set the keyboard focus to the text edit.


This would be consistent with clicking on the Constant number widget which sets the keyboard focus on the text edit.
That is all. Thank you.

I've found these two videos which address the problems mentioned. He's using combinators to dispatch only the required number of trains.

Designing an LTN-style Logistics Train Network in Vanilla Factorio 2.0 Using Interrupts https://www.youtube.com/watch?v=EggDldJVggM

Parametrising Blueprints and ...

The downside of a push system is that it requires more trains.

Let's say you have 5 providers of iron, 1 requester. Also 1 provider and 1 requester of copper. You put 3 trains into the system.

If the iron providers produce (even just a little) more than what is used by the requesters, eventually ...

True! You're referring to https://www.factorio.com/blog/post/fff-377.

My thinking is: Rails are getting a big overhaul. New curves, new diagonals, elevation. Why stop there?

TL;DR
Allow train stops on curved or diagonal rails for more compact station designs.

What ?
Currently, train stops can only be built on straight rails.
It would be nice if train stops would offer more alternatives for station designs, e. g. a station like this:
08-24-2024, 18-46-33.png

Why ...

I've done some tests regarding efficiency of daisy chained labs in 1.1.109. Didn't see a rule about unearthing old topics.

I've only investigated 60 s 6-science research.

Inserters next to labs activate when the science value becomes 1. That requires all inserters to be limited to a stack of 1 ...

My main motivation was that I don't want three cars lying around in chests. I think the items that should be produced in small quantities should get special treatment.

But you're right, for most items it doesn't matter if there's three too many. It's more of an engineering challenge than of great ...

I've been trying to design a mall circuit that delivers the exact amount of items requested. So if 7 belts are requested, it won't deliver 8 or 9, but exactly 7. Similar to this topic .

Here's my current design:
2024-06-29 19_44_06-Factorio 1.1.107.png ...

You posted the edit link to the blueprint. Here's the working link: https://factorioprints.com/view/-LXNpyTm9_3pVRdhNcCk

Here's a blueprint that demonstrates how to use this, with some timers.
0eNrlmd9v4jgQx/8VK9JJ7TZ08zuAru9tpT6V1T3crZBJDFibOJHjdA9V/O83TkqBQMBO2O2t9qVqYPy1PZ ...