NPCs having choppy movement (MP)

[Aldro Koon]

We are troubleshooting this over at {JoF} with our Coding Team but so far we can't make much sense of it.
We believe it's something between servers and clients that are mismatched.
Does anyone have any ideas at all for why Desann here is moving in such a "choppy" way?

It's applies across OpenJK/EternalJK/JA+/JA++/Base, but some combinations don't reproduce it.

https://i.imgur.com/N1ePFSN.mp4

There are combinations of certain server executable/mod/client where the NPC moves perfectly smooth, so this is not normal incase anyone thinks it is.

[Aldro Koon]

UPDATE: @Milamber has found that it's something related to g_smoothClients / cg_smoothClients.
Fingers crossed that we manage to figure it out.

[Circa]

I've noticed this happen before too, on OpenJK servers. Hoping someone can find a solution and provide it for the rest of the community

[Aldro Koon]

On 1/25/2025 at 6:22 PM, Aldro Koon said:

UPDATE: @Milamber has found that it's something related to g_smoothClients / cg_smoothClients.
Fingers crossed that we manage to figure it out.

The above results appear to have been inconclusive, what appeared better and made us suspect this is just not being reproduced today.
It is a very strange thing and I honestly don't know if we can figure it out for we have been trying to (on and off) since 2021.

[NumberWan]

I came across a similar issue in SP on one of my maps – it included too many func_doors and other entities, so the game would have problem processing the NPC movements. This affected walking and running animations only, but not jumping, talking, etc. And OpenJK was also installed.

[Aldro Koon]

On 1/27/2025 at 4:35 PM, NumberWan said:

I came across a similar issue in SP on one of my maps – it included too many func_doors and other entities, so the game would have problem processing the NPC movements. This affected walking and running animations only, but not jumping, talking, etc. And OpenJK was also installed.

We have solved it.

Turns out it's an issue with SV_FPS being above 20, this should be an issue for everyone who plays with values above that (usually 30 or 40).

Milamber has made a patch and he'll get it to OpenJK as well.

[Circa]

9 hours ago, Aldro Koon said:

We have solved it.

Turns out it's an issue with SV_FPS being above 20, this should be an issue for everyone who plays with values above that (usually 30 or 40).

Milamber has made a patch and he'll get it to OpenJK as well.

Hm, makes sense. Mine's always been 40. Is the fix specifically to g_SmoothClients or to sv_fps or both?