Transport Tycoon Forums

I would like to present my first AI, RoadAI.

This AI will build a rapidly expanding road network. It is currently in
early development so please tell me if you find any bugs so that I can
improve it. The AI works best in the temperate or subarctic regions.

This AI uses Superlib v13. Save and Load is currently unsupported.

You may need to extend your vehicle limit from 500 since the AI builds vehicles
very quickly!

Nice to see someone doing something different than the typical point to point connection concept.

I'm also happy to see that you've built ontop of the SuperLib library and thus has been able to do this much on just 696 lines of code. I do have to say however, that the code is a bit more compact than my taste of writing code. But it is your AI and your decision how you like to write your code.

Hello again,

Your AI can sometimes build a huge amount of stations. (Edit: this game started in 1950, so some overcrowdyness is to be expected after 30 years of gameplay, but not to this extent)

Zuu wrote:Hello again,

Your AI can sometimes build a huge amount of stations.

Unnamed, 11th Jul 1981.png

RoadAI_test.sav

(Edit: this game started in 1950, so some overcrowdyness is to be expected after 30 years of gameplay, but not to this extent)

Didn't Paxlink have the same issue? I remember having a game with an old version of Paxlink where the entire city was plastered with bus stations.

How did you solve that?

Here is the next release for RoadAI. I only made a couple of fixes

Zuu wrote:Hello again,

Your AI can sometimes build a huge amount of stations.

(Edit: this game started in 1950, so some overcrowdyness is to be expected after 30 years of gameplay, but not to this extent)

I tried to address this issue by preventing the RoadAI from adding more than one network per town.

I also added another AI Setting which controls the maximum number of road networks the AI may make.

Thank you for all of your suggestions!

I gave your AI a try, here are my remarks:

I think the AI could have placed the bus station better here: Road construction often fails for some reason, maybe the AI ran out of money while building the road and didn't increase its loan? In my test, the AI has only settled in three towns by the year 1964. I have town density set to low, and every seventh town is a city.

Brumi: Do you happen to have the save game with the town in screenshot 1?

Sorry, I don't have it. SuperLib related issue?

I would recommend using SuperLib.Road.BuildStopInTown(town, road_veh_type, accept_cargo = -1, produce_cargo = -1) over using Road.BuildBusStopNextToRoad as the later does not allow specifying cargo that the bus stop should accept. I think however, that future versions of the library should probably allow passing the accept_cargo and produce_cargo params to Build*NextToRoad as well as the higher-level functions that takes a town or industry rather than a tile as argument for where the road station should be placed.

I'm not sure exactly what the choose rule is if you have both accept_cargo == -1 and produce_cargo == -1 which is the case when you use Build*InTown. IIRC it is distance from center, but I dont exactly remember. (it could actually be preferring as far as way from center as possible as that is the behaviour for airports without cargo requirement specified)

It is also worth to mention that RoadAI use min_loops == 25, while CluelessPlus (Road.BuildStopInTown) have it at 50. This setting decide how many steps the algorithm will walk around in the town before settling with the best solution so far.

Here is the next (and possibly final) release of RoadAI.
This is a picture of the improvement:
This is a very rough list of the new features:

1. Greatly improved speed (which actually changes much of the behavior of the AI in many areas )

2. Now can mass upgrade vehicles

3. More dynamic vehicle orders (as in vehicles may go to a larger variety of towns in the network)

3. Other various fixes (including a some recommended on this thread)

I am planning on creating a new AI with the majority of this AI's code simply because I feel limited by the name of the AI and I would like to add air, and possibly train support .

there's no problem with changing the name of the AI... i think... as long as you keep the shortname the same (?) (you might want someone to check that)

Though you cannot change the name of a BaNaNaS entry.

If you consider this AI "done", I'd keep it as it is. Just get a new (short)name for your new AI. It's not that we're particularly short on shortnames.

OK I see what you mean. If it becomes and issue I hope there is an admin that I can talk to to help me change it. Keep in mind that this AI will still accept bug fixes if you find any bugs that may go into my new AI!

I've tried the new version, a problem which I reported earlier still exists, the AI sometimes cannot finish road construction for some reason, probably it is out of money. It would be good if the AI took some loan in this case, or the AI could simply take the maximum loan while constructing a road, then pay it back after construction.

You could try putting something like this?

crash

RoadAI-4

Kogut wrote:crash

* Should be resolved
* Updated to SuperLib v39
* Updated to GPL v3

crash with wrong number of parameters

Crash after loading savegame.

xarick wrote:crash with wrong number of parameters

yea that crash was pretty stupid, and old!

Here is the fixed version, for both of the issues you sent, xarick