Скачать или смотреть ChebMaster's improved monster aiming vs DooM default aiming

Monster aiming: vanilla Brutal Doom v22test3 versus my custom build of Brutal Doom v21che (do not forget: BD is the masterpiece of Sergeant Mark IV, even "my" build is 99% made by him)
Being a rabid proponent of Free Software, I propose this code (or some re-imagination of it) to be included into BD 22 proper.
Shooting at invisible player results in monsters jerking around like they have a spasm (legacy doom behavior), which in fact makes the invisibility sphere a hazard because a skilled player is much more likely to be hit by the resulting bullet hell than by monsters' aimed fire. No wonder the creator of BD replaced all invisibility powerups with captured marine NPCs: classic doom inviso SUXX.
The video is 4-part:
1. invisible player vs vanilla BD 22: bullet hell, doom default
2. invisible player vs ChebMaster's aiming algorithms: monster aims once, then its firing direction is locked until the end of the burst. A) Much more natural, B) makes invisibility really USEFUL, could put it back in the maps.
3. visible player taking cover vs vanilla BD 22: monsters keep firing at the wall, doom default, making "move behind a wall, wait for the burst to end, pop out of the cover" a really powerful technique.
4. visible player taking cover vs ChebMaster's aiming algorithms: monster stops leading player as soon as player is out of its line of sight. Resulting, with a reasonably high probability, with the entire burst flying past your cover. The tried and true "move behind a wall, wait for the burst to end, pop out of the cover" will result in you catching the rest of the burst with your face -- which makes doom more BRUTAL.

Technically, this is very simple: a lot of jump instructions added around each instance of A_FaceTarget except the first one (don't look into that DECORATE code, your eyes will bleed) and the actual firing of the projectile is performed with a combination of flags that disable standard auto-aiming, meaning the monster's facing angle is used for the projectile (retains vertical auto-aim, though). There are two exceptions with a bit more complex code: the mancubus and the cyberdemon, who fire off-center so they need auto-aim (at a player who is not invisible and in their LOS) to compensate for that offset.