I`m having major trouble trying to get this to work.
I create a door in a frame (objects\door_rotate.lua) attached to door. All I want to do is start with the door locked and get a key to unlock it , open it and be on my way. I`ve spent the last two days ploughing the forum / Youtube / Steam forums and I can`t find anything that works. In the behaviour I`ve put "key" in the use key section of the door. I walk up and can just open the door when I haven`t got the key. I`ve tried linking key to door using shooter logic as I`ve seen / read, door just opens . I`ve put "door" in the if used section of the key and when I get the key the door just opens. The key does have key+ script attached from the script files objects. I really don`t think it can be that hard surly. I`ve even got my sons mate from uni to come and have a look as he is doing games design. (I know not using GG Max but thought he may have had a little clue. He didn`t) so I`m getting too my wits end. I`d be pulling my hair out if I could but that`s not possible nowadays. Bit like this door.

@Baldielocks, Click on the target icon on the right side of the screen at the top and then drag the yellow dot from the key to the yellow dot on the door to make a link between the two.

Right now, I do not have keys hooked to my door (for testing reasons) but the picture below shows the links between the lights and the wall switch. Same idea but with lights.

@@Baldielocks, Okay I re-read your post.

First, in the door behavior, uncheck the unlock box like the screenshot below shows


Second, link the key to the door like the screenshot below shows


and it should work like the video below in your test level
https://screenrec.com/share/rUSHRjtPlW

Most doors are already setup to open using the door.lua
The door_rotate.lua is really for creating your own door out of anything without animations and i do not think works with a key yet.

as synchromesh says, door_rotate.lua doesn't currently support locking/keys

Thanks for that guys, all works as it should now. Main problem was I never used the the link between key and door on any door with the "door.lua" on them as the doors I wanted to use all contained "door_rotate.lua" . I changed the"door_rotate.lua" to "door.lua" but that didn`t work either. So I think I`m correct in my assumption that any door asset what I import that has "door.lua" attached to it will work fine. I presume in time the other doors will implement keys/locking in time. Cheers for help, it is much apricated.

here's a version that works with keys - link the key via the linking system and it will automatically start locked (does require the key use key.lua)

Oh very nice ..
Thank you very much

Fantastic, just what the Doctor ordered, cheers.

Works a treat !!
Helps me out a lot thanks

Stab in the dark here but is there any way to get it to open and close via a switch ?
I dont mean lock and unlock i mean open as if you pressed "E"

yes but i had to make it so that the switch only works if it's a little away from the door otherwise you can't really use the door manually too
- this way the door will automatically go back to the state of the switch after you walk away from the door if you open / close it manually
p.s. still works with / without a key

Fantastic Huge thanks !!
Testing it now

Thank you @smallg. I sure hope this incredibly useful script will find it's way into the next build for everyone to take advantage of, rather than getting buried and forgotten in the forums.