Bug: taking physics objects through a portal with a gravity gun breaks physics

Trico-Everfire commented 2 years ago

Describe the bug

There is strange, undefined behaviour when it comes to gravity gunning a object, and taking it through a portal, depending on how you take the object through, the way you drop it and the way you interact with it after it's been dropped, it can have the following recorded effects:

object becomes incorporeal, doesn't allow the player to collide with it.
picking up the object will send it to the location of one of the portals, causing it to go through and usually launch out of it.
object will start flying through a portal and then into the player's gravity hold.
object will fly in an infinite loop through the portals, this'll semi release the object from the gravity gun's grasp, attempting to stop the object usually results in a game crash, similarly, picking up another physics object with E (the 'use' key) will cause the object you're attempting to grab to fly in the opposite direction through the portals as the affected object, usually causing it to collide with it, crashing your game as mentioned before.

Issue Map

sp_a2_triple_laser

To Reproduce

open sp_a2_triple_laser use portal gun to create 2 portals. give yourself a weapon_physcannon. use weapon_physcannon. walk through a portal with the object. do this a couple of times, eventually stuff will show up.

https://user-images.githubusercontent.com/55441008/189681429-01b204f1-c7a9-46f7-9f0b-2694fb8ec41a.mp4

https://user-images.githubusercontent.com/55441008/189681450-09f6c12a-4dc0-47fb-bbe6-ff6c41d459d5.mp4

https://user-images.githubusercontent.com/55441008/189681459-ff6fc4e9-835c-4c55-bfc5-ade00bb8cdfa.mp4