M28AI Devlog (v224)

NomenNominandum

It would be awesome if I could tell the AI to gift me an engineer.

maudlin27

@NomenNominandum You can (try using a text marker to ask)

maudlin27

v224 Update
15 changes, including:

M28 should place markers when it spots high value enemy units if it has a human teammate
Engineers should be more likely to reclaim wrecks within a second of being in range of the wreck.
Decreased bomber aggression early game and where M28 lacks intel
T2 radar outside the base can be upgraded to omni on larger maps when M28 has very good eco
2 QUIET specific changes, including an infinite upgrade bug and fixing factory enhancements

Acknowledgements

Relent0r - identifying triggers relating to a brain gaining visual of a unit that I was able to use to add in some taunts (although after working on it some more I decided to go with a custom approach for greater functionality)

Swarm133

Firstly, I like the AI. For someone that likes to play vs AI rather than pvp, I appreciate the work you do.

It would be great to have a setting to turn down the strat bomber hover spam. Or the ability to scale the amount of APM to a more human-like amount. I get flooded with 50+ strat bombers, each hovering out of range, flicking bombs forward. No shields can protect you and AA cant kill them fast enough. By itself, it is a minor issue, but the AI being able to focus on that while doing micro on everything else on the battlefield can make it hard to deal with.

I'm also unsure of how balanced ASF vs AI ASF combat is. I've often outnumbered their ASF while having vehicle AA below, and my ASFs get decimated while the AI ASF are barely touched.

Laso

The AI is cheating again.
Last game the M28 (easy) marked a nuke without seen it.
Same seems with other funktions but i cannot proof it. For example the first bomber. It seems he sees everything without having a scout.
It would be nice to have a funktion to stop M28 doing things that are not possible for humans.

Sprouto

@Laso That's essentially how M28 (and many previous AI as well) performs. It has information it shouldn't, and does things with units that you would find it either impossible or incredibly difficult to do. It's not, and doesn't claim to be, a level playing field.

maudlin27

@Swarm133 Thanks for the feedback; I can look at how feasible it would be to add further customisation into how it uses hover-micro as a game setting (e.g. the number of units it's able to hover-micro simultaneously); in the meantime you can play using M28Easy which should disable all hover-micro.

For ASF vs ASF combat I've seen it lose lots of air fights that have looked relatively close in separate replays, but there is a high degree of variability in asf matchups even with the same tactics being used by both the player and the AI, so it's certainly possible that you can have more asf and lose an air fight, although I'd expect with a significantly larger force you should overcome the variability/micro difference.

To help illustrate what I mean, in sandbox you could create 50 asf for two players, and have 1 group attack-move towards the 2nd group, and the 2nd group move and then press stop when near the 1st group; I'd expect the 2nd group to win the fight. M28Easy will disable the main micro M28 uses in asf vs asf fights, which I'd expect to make it weaker (although I've not actually tested to confirm!)

@Laso Please can you provide a replay - the only scenario I'dve thought M28 would have knowledge of a nuke it hasn't scouted is if that nuke has already launched its missile; M28 aims to approximate what a competent human player can infer by recognising certain units exist when they fire, to avoid scenarios where an unscouted unit can fire at M28 and it continues as though that unit doesnt exist (another example would be a monkeylord firing outside of visual range - a human player would see the big laser and know there's a monkeylord there). I'd need a replay to check or (if it's marking the nuke when it shouldn't) to fix the bug causing this).

As for the first bomber again I'd also need a replay to assess, but I can assure you it is very much limited by intel, and doesn't see everything despite not having a scout. For example, in the recent rainbow cup semi-finals you can see the dark blue early t1 bomber do a number of suboptimal plays due to its lack of intel:
https://www.youtube.com/watch?v=GQI_jUrivfk&t=120s

Once it gets near the enemy T1 AA (bombers have a radar+visual range although you can't see this in the cast due to observer view) it decides to turn and try and seek a different target
It then proceeds to go towards various empty mexes with no units, because it's trying to find enemy engineers to target (2m10 of the replay/2m32 of the video)
It's not until 3m20 of the replay (3m47 of the video) that it approaches a location with enemy units, having wasted a long time trying to find some

Saver

@maudlin27

Hello maudlin,

I can confirm the message that the M28 detects special units such as Experimentel or Nuke even without sighting. Unfortunately I don't have an ID because I tested it in the offline mod. However, here is a picture. The M28 was in support mode here.

Laso

@maudlin27
You are correct the nuke was marked when it was fired.
Replay is #24774490
I watched the replay and the bomber looks ok. Fast reactions but ok.

maudlin27

@Saver If it's the last game you played then the replay should be available, e.g. in:
C:\Users\USERNAME\Documents\My Games\Gas Powered Games\Supreme Commander Forged Alliance\replays\FAPROFILENAME\LastReplay.SCFAReplay

I expect in your case M28 sent an air scout near the enemy units at some point which allowed it to detect them (e.g. since both those units have an anti-air attack, it could've been that they fired this at the air scout; alternatively M28 could've got intel with no Omni coverage, or subsequently stalled E, meaning the unit was visible for a brief period of time to it)

However in the case of nukes I'll tone down it's approach to highlighting units for enemies so if it doesnt have a visual and it is a long ranged unit (like a nuke) it should just warn in chat (since while a player might have a good idea where the unit is from the direction the missiles/arti shells come from, on some larger maps it can still be hard to infer)

maudlin27

v225 Update
17 changes, including:

New game options to make M28's micro more configurable. You can now specify the maximum number of units it can simultaneously apply dodge micro to, and/or hover micro to (previously there was just an option to enable/disable dodge micro, or to use M28Easy to disable). Refer to the "M28: Use hover air micro?" and "M28: Use dodge micro?" settings in Game Options. @Swarm133 this means you can disable its hover-micro with asfs without affecting other micro.
Gunships should use a more precise check of if the enemy has nearby groundAA when deciding whether to retreat (or search for further away targets)
T1-T2 gunships should be more cautious when taking damage so they're less likely to die (e.g. meaning jesters have a chance of surviving when fighting a single flak)
Several refinements to how ASFs decide whether to attack targets, including factoring in nearby enemy ground AA that isn't large enough to make the asfs run in its own right, but when combined with the enemy air force could turn an air win to an air loss
Changed the use of markers to a general chat message where long ranged units that M28 hasn't seen start firing at it and it wants to warn its teammates

Acknowledgements

Votex – Highlighting M28 building t3 shields to protect 1 mex from a t3 arti