There were two booleans that could be merged into the flag word.
This also fixes a bug with CHAN_NOSTOP not working for local sounds because it checked the wrong sound source for the playing sound.
- These are offsets for camera angles that allow turning the camera without affecting aim or movement direction.
- Added SPF_VIEW flag for A_SetAngle/Pitch/Roll, which will set the view direction instead of the actor's actual facing direction.
- Added ABSVIEWANGLES flag, used to make the view absolute instead of an offset.
- added Marisa Kirisame's CHAN_OVERLAP flag.
- exported S_IsActorPlayingSomething to ZScript.
The sound API change required deprecating A_PlaySound and S_Sound. There are now new variants S_StartSound and A_StartSound which have two distinct parameters for channel and flags.
There are two options here - one only disables the vertical thrust and the other goes back fully to the original non-z-aware code.
Both options are settable through MAPINFO.
For the compatibility presets, the normal ones only disable the vertical thrust, the strict ones force use of the old code entirely.
