[2.0.39] Holding Ctrl w/o Shift results in aligned bluepring losing alignment

[Hares]

Sometimes, when you first drag blueprint over already-built entities to enforce correct alignment, and then press Ctrl+Shift while holding LMB, the resulting BP becomes misaligned. I tried to report this bug during the early SA days, but didn't succeed in recording it, and didn't encounter it since then so I thought it was fixed. It was not. Frame-by-frame inspection of recording resulted in the following fact. The recording is done at 60FPS, so it's fair game.

Steps to Reproduce

1. Have non-parameterized, tileable blueprint (local grid)
2. Build it somewhere
3. Wait until it's deployed
4. Make sure there are hard obstacles blocking next section (i.e., other structures)
5. Press & hold LMB that blueprint over these built entites
6. Drag to the side, covering these obstacles
7. Press Shift+Ctrl to force deployment

Expected:

• That blueprint is super-force built on the next spot, correctly aligned

Actual:

• If, while pressing Ctrl+Shift, you pressed Shift first, everything's OK
• If Ctrl was pressed first, however, the alignment breaks
• Then, the next frame Shift is pressed, and Super-Force deployment is triggered to the target location

Frame by frame presentation

1. Control pressed:

   

   03-06-2025, 14-43-44.png (1.98 MiB) Viewed 455 times

2. Alignment broken:

   

   03-06-2025, 14-44-05.png (2.03 MiB) Viewed 455 times

3. Shift pressed:

   

   03-06-2025, 14-44-21.png (2.38 MiB) Viewed 455 times

4. Super-force mode enabled:

   

   03-06-2025, 14-44-44.png (1.98 MiB) Viewed 455 times

5. Deploy order created:

   

   03-06-2025, 14-45-12.png (2 MiB) Viewed 455 times

My hotkeys for BP deployment are default.

Keybinds

03-06-2025, 14-34-03.png (71.27 KiB) Viewed 455 times

See Also

• 121841: Make parameterized blueprint compatible with "snap to grid"

Click to expand the recording

[Rseding91]

Thanks for the report however this all looks correct. When you press ctrl you are disabling the active build operation because ctrl + click is not bound to any building methods. It is "transfer item in cursor into entity". When you then press shift you enable "super force build" which is a bound hotkey.

As far as I can tell the answer here is you simply need to not press that key sequence if you don't want that action to happen. Or, re-bind ctrl + click (fast entity transfer) to something else.

[Hares]

Thanks for the report however this all looks correct. When you press ctrl you are disabling the active build operation because ctrl + click is not bound to any building methods. It is "transfer item in cursor into entity". When you then press shift you enable "super force build" which is a bound hotkey.

As far as I can tell the answer here is you simply need to not press that key sequence if you don't want that action to happen. Or, re-bind ctrl + click (fast entity transfer) to something else.

I can suggest adding Ctrl+LMB as a secondary hotkey for blueprint deployment (non-force, non-super-force). This should both solve the mentionted issue for all players (and I believe it's more than just me who encountered this problem), and not introduce any additional logic. This should also be compatible with mods as I never saw a mod using Ctrl+LMB used together with the selection tools, besides custom Spidertron Controls which, IIRC, uses different keybinds.

Though I didn't test the proposal as I'm out-of-Factorio currently.

[Hares]

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I can suggest adding Ctrl+LMB as a secondary hotkey for blueprint deployment (non-force, non-super-force). <...>

Confirmed. That method is fully working and completely harmless regarding backwards compatibilty unless xkcd-1172.