Checking for existence in rules

[baku...@yahoo.com]

I know you can use the No keyword very effectively in the WinConditions section, but I am wondering: is it possible to use it in the Rules as well? My scenario is that I want there to be a door object that cannot be passed through, but it becomes an open door object after you catch all the monsters on the level. When you catch a monster, it becomes a "CapturedMonsters" object instead of a Monsters object, so I tried the statement
[Door][No Monsters] -> [OpenDoor][]
to no avail. I am pretty new to Puzzlescript so any help would be much appreciated!

[Stephen Lavelle]

[no monsters] matches every tile without a monster.  There's no good syntax for checking if I a monster doesn't exist.  You can do some weird inverting to get the same effect:

[monster] [] -> [monster] [temp] (flood all tiles with temp if there's a monster)

random [door no temp] -> [ opendoor ] (open a door if there's a temp)

[temp] -> [] (remove all temps)

[baku...@yahoo.com]

Ah, that's a shame. Thanks!

[Hugo]

Oh, that explains some similar issues I had with my game. That certainly clarifies things now. Thanks!

[Joe Shermetaro]

I was searching for an answer to the same question. An alternative solution is to put these two rules at the end:

late [DoorClosed] -> [DoorOpen]

late [Monster] [DoorOpen] -> [Monster] [DoorClosed]

This opens the door every turn, but then instantly closes it again unless there are no monsters remaining.

[Pancake Robot]

This gives me the visual of a guard peeking out of the door every turn only to slam it shut when he sees a monster.

[Builder17]

torstai 28. toukokuuta 2020 1.06.20 UTC+3 Pancake Robot kirjoitti:

This gives me the visual of a guard peeking out of the door every turn only to slam it shut when he sees a monster.

But would this work?

late [DoorClosed] -> [DoorClosed Temp]

late [Monster] [DoorClosed Temp] -> [Monster] [DoorClosed] 

late [DoorClosed Temp] -> [DoorOpen]

I believe it would.