M28AI Devlog (v130)

v117 Update
29 changes mostly based on M28 vs LOUD matches:

• Further adjustments to logic for upgrading mexes, so it's more likely on a large map, but if a T2 mex upgrade finishes in a zone, a T3 upgrade shouldn't be started if there are T1 mexes in adjacent zones that could be upgraded instead
• Capped mobile shields based on gross energy income
• T1 land factories should no longer prioritise the slowest unit (with other changes made to try and still get the effect of not building LABs after the first couple of units) - more relevant for unit mods that add more T1 units
• Engineers should be more likely to build land factories if dropping on an island that as a whole has lots of mexes (even if the zone itself doesnt)
• Units in short range support should be more likely to attack - this is most relevant if e.g. a GC is 'escorting' a T3 mobile arti or MML, and the GC thinks it can win the battle by just attacking itself
• 145 LOUD related changes, including no longer building very weak units like hoplites and T3 sniperbots, and prioritising units that are much stronger in LOUD; RAS upgrade is less likely, T3 arti are more likely, fixed issue where transport drop events weren't triggering (meaning land facs wouldnt get built by the engi drop), fixed bug where MML and arti shots wouldn't be attempted to be dodged

Acknowledgements

• Tematus – 1v1 replay vs LOUD, and noting LOUD has halved the cost of T3 arti vs FAF
• Azraeel – various suggestions and highlighting issues in LOUD, such as units that are particularly good in LOUD and ones which don’t work well with M28
• Sprouto - fixing a lua error message that would appear in the log in games where M28 was active

v118 Hotfix
Hotfix due to a bug introduced in v117 that caused the game to crash with total mayhem depending on what other mods were enabled. Other changes:

• Fixed a bug present for a long time with T3 arti target selection (that meant in most cases they weren't firing at the target they considered the best)
• Added new shot synchronisation logic for T3 arti so they are more likely to fire at the same target as other T3 arti

Acknowledgements

• TiborDeimos - Sending a log where M28 crashed with totalmayhem enabled

Thank's for the Hotfix. Wasn't sure if it went out of memory or was crashing because of some mods.

Still love this AI

@maudlin27 hi, I was wondering if the changes to the loud part will affect FAF's mod? Some mod units are weak, but I still want to see them in the game.
Also, when playing faf's high cheat multiplier, I found that the M28 hardly builds land T3. Basically, only a large number of ASF and experimental are built. Although I like to see a variety of experimental products, can M28 also make full use of the land factory in the case of high resource overflow? For example, if the resource overflow of M28 is high, can all these idle LAND factories build a large number of diversified T3 land, and directly set the production assembly point at the enemy base?

@zhanghm18 Many of the LOUD changes relating to unit mods will affect FAF games using the same unit mods, but I’d expect the variety of land units built overall to increase slightly for the t1-t3 land stage from the changes made (not decrease), as the way it was setup before was M28 would prioritise base FAF t1-3 units (now it prioritises those units and certain mod units)

Re not building more land facs, I’d expect more to be built in 15km and smaller maps if M28 has lots if mass stored and isn’t close to the unit cap, subject to how much air the opponent has

@maudlin27 I guess the problem is that AI's population has always been close to cap in the case of high resource overflow. And I find a lot of times AI is obsessed with building a lot of ASFs and gunships (high cheat multipliers). Maybe that would make it easier for him to win? But in the case of extremely high resource overflows, I still expect him to build a variety of units.
And I tried the latest version, and I felt that the AI's unit diversity was not even as good as the previous version. AI is now obsessed with building specific 1-2 mod T3 units instead of building diverse T3 units by tag like before.
It would be nice if you could set up a simpler, more random unit selection logic for high cheat multipliers (e.g., cheats over 4X)

@zhanghm18 The reason for preferring t3 air over t3 land when reaching the unit cap is the time from production to combat is much lower for air, so it ends up being a better use if the unit cap (eg you could probably build a gunship, attack the enemy base, lose it, and repeat 2 more times in the time it would take a brick to move to the enemy base and die)

v119 Update
18 changes, including:

• New game option to disable M28's unit prioritisation logic (that e.g. means after a few LABs it builds tanks; or after a few loyalists/titans it builds bricks/percies) - so e.g. @zhanghm18 you should see more variety of units when you have the unit mods enabled
• New game option to disable M28's dodge micro (for those who dont want to turn off all micro per M28Easy)
• M28 should try and build SAMs and protect them with a shield if faced with an enemy ahwassa (if it has too few asfs)
• Reduced the extent to which M28 should be aggressive with units where the enemy has vulnerable buildings to stop cases where it could cause fatboys to ignore a nearby enemy megalith
• 10 LOUD related changes, including more unit prioritisations (e.g. t1 sniperbots shouldnt be built), reducing tendancy to upgrade hydros that are near the frontline, starting the first t2 mex upgrade earlier, and increasing the land to air factory ratio

Acknowledgements

• Azraeel - several replays and suggestions re LOUD games
• Vortex - LOUD suggestions and a replay re an early factory upgrade bug
• Fearghal - Replay highlighting an issue where M28's fatboy wouldn't try and run from an enemy megalith

@maudlin27 Thank you! I'll try the latest version later

@maudlin27 Tried it out and the new option is very good! I saw a lot of mod units that had never been built before on the M28.More AI options are a really good idea. We can restrict more of the AI's behavior based on how we like to play the game, which is fun!
But the V119 seems to break cybran's experimental shield logic. cybran doesn't seem to be building experimental shields at all now.
Maybe have the AI build an experimental shield for every five normal shields built (at high resources). Maybe this will ensure that the experimental shield doesn't go unnoticed by the AI?
But I do see AI building some experimental buildings in mods (such as experimental power Generators)
In addition, I found that the AI still seemed to build engineers repeatedly and self-destruct (in the case of high unit cap occupation, but the enemy's long-range artillery destroyed the AI's shield), it seemed that the AI wanted to build more engineers to replenish the shield on the one hand, and wanted the self-destruct engineer to save the unit cap on the other hand

@maudlin27 Thanks again for your ongoing development of this great AI. Just played a game against the latest version. If you like and have a look at replay #23108870 from 51 mins on. The AI does strange things/nothing to recover from a situation where it has lost all energy generators.

Surely an exceptional case and probably something not in your key focus. But maybe there is an easy fix to this behavior?

Thanks for the new info for updates. Not sure if this is related to the update, but during a game it looks like there was an error.

If it's of any help, can post some error info here.

EXCEPTION_ACCESS_VIOLATION (0xc0000005) at address 0x0067a1a7
attempted to read memory at 0x5e50a9c1

warning: Error running lua script: ...mmander forged alliance\mods\m28ai\lua\ai\m28map.lua(745): table index is NaN
stack traceback:
...mmander forged alliance\mods\m28ai\lua\ai\m28map.lua(745): in function `GetClosestPlateauOrZeroAndZoneToPosition'

@lightwire Could you post the replay ID? The 'error running lua script' message is something I could look into.

@Hammi I'll have a look but if all of M28's power was destroyed then it's not something I'm likely to be able to solve - it should already prioritise building more power in such scenarios, but as the game will be lost if the opponent has killed all of its power, there's a limit to what I can do (without either negatively impacting its normal logic, or further complicating already cpu intensive processes for pausing units when stalling energy)

@zhanghm18 I can't think of a change in 119 that would've impacted on building experimental shields. If the shields are the same size as normal shields, M28 has great eco (including energy), only has Cybran on the team, and is building scathis and/or t3 arti I'd have expected it to build some.
For the engi self destruct this is likely a consequence of two competing systems fighting each other for which there isn't really a solution - i.e. it wants more engineers to spend its mass in high eco scenarios, but if it has got rid of all its T1-T2 units and has lots of engineers it will ctrl-K some of its t3 engineers (prioritising those without orders) to free up its unit cap, although I can probably mask the problem slightly more

@maudlin27 said in M28AI Devlog (v119):

@Hammi I'll have a look but if all of M28's power was destroyed then it's not something I'm likely to be able to solve - it should already prioritise building more power in such scenarios, but as the game will be lost if the opponent has killed all of its power, there's a limit to what I can do (without either negatively impacting its normal logic, or further complicating already cpu intensive processes for pausing units when stalling energy)

I just find it interesting that the AI doesn't actually start again from scratch by building power. It just builds a factory and then sits there.

Unfortunately the replay desyncs around 26m so I can't see for sure what the circumstances are. At a high level, I'd expect if all factories are destroyed the ACU should try and build a new land factory; if there are engineers they should build power as a high priority; if there are no engineers, the factory should build some. The exception would be if there are enemies near the factory/engineers.

In the desynced version the ACU was trying to build a t1 land factory first which is in line with what I'd expect, but was hampered because of the energy drain from its T3 mexes. However, adding a fix for this (pausing T3 mexes) could cause its own problems elsewhere since it's very rare to want to do this.

@maudlin27 I think that's the reason for the problem. The experimental shield in the MOD is larger than the normal shield SIZE. This resulted in M28 not building them.
It should be noted that I remember that the M28 built these larger experimental shields in previous versions. But the problem started with some recent version (sorry, I'm not sure which one).

@maudlin27

Sure. After the game crashed, It didn't show the reply right away in the replay list.

I think this is the one.

https://replay.faforever.com/23113989

@lightwire said in M28AI Devlog (v119):

23113989

Thanks, the 'table index is NaN' error message looks like an issue with the map where a building got destroyed off-map/something strange happened (as the position of the building in the engine shows as an infinite value), I'll add a check for that in the next update so it doesn't cause a bunch of error messages with M28's logic.

Don't know if it would have contributed to the crash or not; I'd have thought it plausible lots of error messages could make a crash more likely, but my change won't necessarily help that as the unit mods being used were generating lots of error messages themselves prior to that point.

v120 Update
19 changes, mostly relating to minor bugfixes, including:

• New asf/intie hover-micro to increase DPS when targeting slower enemy air units such as transports
• New higher priority T1 and T2 radar builder where M28 has a significant force of longer ranged units that lack radar coverage
• Fixed an issue for water zone assignemnt in the small area surrounding an island that led to some strange zones on white fire
• 4 LOUD/mod changes, including support for upgradable t2 pgens, and observation satellite

Acknowledgements

• Lightwire – Replay where a map issue caused repeated M28 error messages
• Azraeel – LOUD replay
• Fertgl – Replay where a megalith got stuck

@zhanghm18 said in M28AI Devlog (v120):

@maudlin27 I think that's the reason for the problem. The experimental shield in the MOD is larger than the normal shield SIZE. This resulted in M28 not building them.
It should be noted that I remember that the M28 built these larger experimental shields in previous versions. But the problem started with some recent version (sorry, I'm not sure which one).

@maudlin27 hi, I would like to ask if the construction of the larger experimental shield will be solved?