The Battle for Wesnoth Forums

I think I have found the problem. I made a mistake when setting metatables for my internal objects, apparently creating a reference cycle between my prototypes. That was most likely the source of the issue. It explains why Wesnoth choked when trying to display these objects or call their methods ...

gnombat wrote: December 16th, 2025, 1:49 pm It would probably be better to use std_print(message) or wesnoth.log('error', message, false) here - that will log to a file rather than the Lua console.

Thanks for the pointer, that's useful.

I didn't realise there was a Discord server for Wesnoth. Thanks!

Hello,
I'm developing a random map generator for my campaign. It's currently over 3000 lines of Lua code and probably not a very well-optimized at that. As I try to add a new feature to it. I'm going into the situation, where Wesnoth hangs on map generation. The window stops refreshing. When I call ...

I can see now that events don't prevent undos if they were filtered out by their filters. So in my case it's actually sufficient to use wesnoth.game_events.add instead of wesnoth.game_event.add_repeating and provide a filter. That said it would still be very nice to have wesnoth.experimental ...

Hello,
the EventWML documentation describes allow_undo and on_undo direct action tags. However, there seems to be no equivalent for them in the LUA API, wesnorth.game_events.add and wesnoth.game_events.add_menu don't mention any option of allowing undo. wesnoth.game_events.add_repeating does have an ...

Thanks for the pointer, I think I've figured it out now.

In Wesnoth 1.18.2, in my scenario WML, for some sides I have the following variables section:

[variables]
[tactics]
[tactic]
role=assassin
count=0
weigth=3
[/tactic]
[tactic]
role=hunter
count=0
weight=2
[/tactic]
[tactic] # no particular role
count=0
weight=1
[/tactic]
total ...

But set_extra_recruits will define additional recruits attached to the leader, right? To achieve what I want I'd need to set the side's standard recruit list to be empty and only use extra recruits. Right?

Okay, I debugged the issue and understood it. The problem was actually not in the piece of code that I have shown, buit in another, handling another type of castle, of which there were multiple instances. The reason for error was my misunderstanding of how [or] tag works. I wrote:


[filter]
side ...

I managed to solve it using formula condition instead of controller within filter_side like this:

[event]
name=prestart
[kill]
[filter_side]
side=1,2,3,4
formula="not (is_human or is_network or is_ai)"
[/filter_side]
[/kill]
[/event]

I thought to leave it there for the moment, while I'm still developing the scenario. Otherwise, what is the editor/scenarios directory good for if files in there don't load macros by default? In any case, this doesn't seem to work. When I enter any multiplayer game setup, I get Error: Macro/file ...

Thanks a lot for the explanation and the workaround. I'll try to make it work!

BTW, macros don't seem to work for me for some reason. I verified they're where they're supposed to be in /usr/share/wesnoth, but whenever I try to use one, I get file-not-found error mentioning the macro name. I place ...

Initially I didn't write side=$unit.side, I added it later thinking maybe it'd solve the problem, but it didn't/ Thanks for explanation, anyway.

Have you verified with :inspect that

Not yet. But I observed that other sides' recruitment lists change in a way consistent with what I described above.

In a multiplayer scenario that I'm working on, I want a mechanics inspired by games like Heroes of Might and Magic. Namely, I want the list of units a leader can recruit depend on the type of castle they're currently in. To do it, I'm using moveto and exit_hex events as follows:


# recruiting ...

I'm building a multiplayer scenario, intended to be played by 1-4 players. Each side has a predefined leader, so if there is less than 4 players I need to remove non-playing leaders in a prestart event. I wrote the following code to accomplish this:

[event]
name=prestart
[kill]
[filter_side ...