there is an object in the portal 2 sdk that I think is ported to here
IDK

bruh the addon claled "doors" has a custom map in the "other" section of the map loader thingy and its called "spacial_bullsh*t" and the creator of this map probably took the code or model or whatever of those and ported them into hammer its not that hard to understand (me saying this is probably not true in some ways)