Factorio Forums

We can rotate entities we copy before pasting them. Any plans to allow us to mirror/flip them?

Would love this feature.

Probably not, for the same reasons that you can't mirror/flip blueprints in vanilla.

Blueprints with chem plants, refineries and stations/signals often break when mirrored/flipped. Refineries because when the blueprint is mirrored, what was a water input pipe, is now connected to the refineries crude oil input, and heavy and petrol output pipes swap places as well. Chem plants with recipes using 2 different input or output fluids have the same problem. Stations and signals, because the station/signal needs to be always on the right hand side of the track, but mirroring/flipping means they are now on the opposite side of the track, which means most rail blueprints would be broken.

This makes much sense

Even though one could implement flipping as long as those mentioned blacklist doodads do not exist in the blueprint, and give a errormsg otherwise, but for large blueprints this is probably almost never the case.

I'm pretty sure a warning like "This blueprint might not work as expected if mirrored" would be enough and everyone would have an awesome feature.

The Foreman mod does mirroring, though it may need to be updated for 0.17. I'd prefer it to be in Vanilla though.

I don't think that the edge cases justify not implementing mirroring. Have you ever tried manually mirroring a large belt balancer? Ugh. Having to fix a few signals, structures, or pipe connections that can't be placed occasionally is a small price to pay.

Also the BlueprintExtensions does it pretty well, and is up to date for the 0.17.

First time I heard about that extension, thanks for recommendation.