Adds support for client-side Thinkers, Actors, and ACS scripts (ACS uses the existing CLIENTSIDE keyword). These will tick regardless of the network state allowing for localized client handling and are put in their own separate lists so they can't be accidentally accessed by server code. They currently aren't serialized since this would have no meaning for other clients in the game that would get saved. Other logic like the menu, console, HUD, and particles have also been moved to client-side ticking to prevent them from becoming locked up by poor network conditions. Additionally, screenshotting and the automap are now handled immediately instead of having to wait for any game tick to run first, making them free of net lag.
Now uses its own self-managed linked list with its level tracking the head pointer. Allows for VisualThinkers to be moved to any desired stat instead of being stuck in STAT_VISUALTHINKER.
- Effectively similar to Actors, but without the excess.
- Can be created with either the `level` function or the static `Spawn` function in ZSprite.
- STAT_SPRITE belongs to ZSprites only; ZSprites cannot be moved out of, nor can anything else be moved in to, this statnum.
Misc:
- Fixed (Sprite)Offset taking roll into account.
Crediting phantombeta, RicardoLuis0 and RaveYard for assistance.
The level’s global flag is unreliable and cannot be used. The operation this was initially supposed to skip cannot be skipped anyway so the impact should be minor.
- Previous comments in dobjgc.cpp suggested that StepMul was used
to determine how quickly garbage was collected based on how quickly
memory was being allocated. This was not the case. Now it is.
- Remove calls to CheckGC from the thinkers. With GC running at a
stable rate (once per frame), there should be no need to inject
pauses into the collection process to keep it from injecting stutters
(provided StepMul is sane). The risk of running out of memory because
we don't run a collection pass absolutely every thinker should be
practically zero.
- Reduce DEFAULT_GCMUL from 400 to 200, since it does what it says now
instead of something else.
Especially in the thinker code this is needed for software rendering.
Strictly speaking, the software renderer should do the same, but it checks r_dynlight in so many places deep in the logic where the level is not available.
When exception is thrown from JITed code, VM stask isn't cleared during unwinding
It needs to be clear explicitly to avoid memory leaks and references to destructed objects on shutdown
https://forum.zdoom.org/viewtopic.php?t=66172
