[HL] Vortigaunt doesn't teleport away during resonance cascade if blocked by cart

[dscharrer]

During the resonance cascade sequence, several Vortigaunts get teleported into the test chamber, fall down, and then get teleported away again before/when they reach the ground. One of them falls where the cart with the Xen crystal appears. If you pull the cart back out of the testing apparatus when the resonance cascade starts, it blocks that Vortigaunt's fall and he never teleports away:

He then happily kills the unarmed player after the resonance cascade sequence (well, if you let him anyway):

Note that you can't pull back the cart all the way, probably to prevent just this, ~~indicating that there may be a regression here~~. (edit: this also happens in the pre-Steam version if HL)

system information

[dtugend]

I am afraid this will be labelled feature xD

[treetoon]

This technique is used in speedrunning, is saves roughly a minute, improves gameplay and sets the skill cap higher. Regular players of the game is not going to run in to this issue, hence it would be asinine to change it. The 170% bunnyhop cap back in 2001 ver.1.1.0.8 has already drastically hampered the gameplay for people looking to have fun after completing HL1 "casually".

[YaLTeR]

After they completely ignored the request to add some way to enable autojump, let alone not removing _special in first place, I'm not even trying.

[lightningterror]

This happens because the cart blocks the Vortigaunt from reaching the trigger_teleport.

There are several ways to go about fixing this.

1. Can freeze the cart when inserted,
2. Can move the trigger a bit up so there won't be a collision, along with the spawn.
3. Can move the trigger to the side, along with the spawn.

Tbh dunno why there's a trigger teleport, the above trigger once can just kill/remove the entity without relying on the teleport, same goes with the other vortigaunts.