LuaWML/Sides

This page describes the LuaWML functions and helpers for handling sides and villages.

wesnoth.sides

This is not a function but a table indexed by side numbers. Its elements are proxy tables with these fields:

• side: the side number
• gold, village_gold, base_income: integers (read/write)
• total_income: integer (read only)
• objectives, user_team_name: translatable strings (read/write)
• objectives_changed: boolean (read/write)
• team_name: string (read/write)
• is_local (Version 1.13.3 and later only): boolean (read). Whether the side is local. Careless use will cause OOS errors.
• controller: string (read/write) :

note: In networked multiplayer, the controller attribute is ambiguous (won't be the same on all clients). Be very careful or you'll have OOS errors.

The controller attribute has 6 possible values: human, network, ai, network_ai, null, idle.

A local human should always be "human", a local ai should always be "ai", a remote human should always be "network". and a remote ai should always be "network_ai". An empty side should be null on all clients.

An idle side should appear similarly as a "human" side for all sides that don't own the idle side, i.e. as "network".

These values may be checked using lua, or the :controller command in game.

This value can only be set to 'human', 'ai' or 'null'.

• fog: boolean (read (Version 1.13.7 and later only)/write)
• shroud: boolean (read (Version 1.13.7 and later only)/write)
• hidden: boolean (read/write)
• name: string (read)
• faction: (Version 1.13.5 and later only) id of the selected faction, string (multiplayer-only, read)
• faction_name: (Version 1.13.5 and later only) name of the selected faction, string (multiplayer-only, read)
• color: string (read/write)
• recruit: table of strings (read/write)
• scroll_to_leader: boolean (read/write)
• village_support: string (read/write)
• flag: string (read (Version 1.13.7 and later only)/write)
• flag_icon: string (read (Version 1.13.7 and later only)/write)
• defeat_condition: string (read/write) See description at SideWML, ScenarioWML#Scenario_End_Conditions
• lost: bool (read/write) If lost=true this side will be removed from the persitent list at the end of the scenario. This key can also be used to stop the engine from removing a side by setting it to false. Writing this key only works in a victory/defeat event.
• persistent (Version 1.13.5 and later only): boolean (read/write)
• suppress_end_turn_confirmation (Version 1.13.7 and later only): boolean (read/write)
• share_vision (Version 1.13.7 and later only): string (read/write)
• share_maps (Version 1.13.7 and later only): boolean (read)
• share_view (Version 1.13.7 and later only): boolean (read)
• num_units (Version 1.13.7 and later only): integer (read)
• num_villages (Version 1.13.7 and later only): integer (read)
• total_upkeep (Version 1.13.7 and later only): integer (read)
• expenses (Version 1.13.7 and later only): integer (read)
• net_income (Version 1.13.7 and later only): integer (read)
• __cfg: WML table (dump)

The metatable of these proxy tables appears as "side".

local team = wesnoth.sides[1]
team.gold = team.gold + 50
wesnoth.message(string.format("%d sides", #wesnoth.sides))

wesnoth.get_sides

• wesnoth.get_sides(filter)

Returns a table array containing proxy tables for these sides matching the passed StandardSideFilter. The output is the same format as the wesnoth.sides table, above.

--set gold to 0 for all sides with a leader
local sides = wesnoth.get_sides({ {"has_unit", { canrecruit = true }} })
for i,v in ipairs(sides) do
    v.gold = 0
end

wesnoth.get_village_owner

• wesnoth.get_village_owner(x, y)

Returns the side that owns the village at the given location.

local owned_by_side_1 = wesnoth.get_village_owner(12, 15) == 1

wesnoth.set_village_owner

• wesnoth.set_village_owner(x, y, side, [fire_events])

Gives ownership of the village at the given location to the given side (or remove ownership if none). Ownership is also removed if nil or 0 is passed for the third parameter, but no capture events are fired in this case. An optional 4th parameter (boolean true|false, default: false) can be passed determining whether to fire any capture events.

wesnoth.set_village_owner(12, 15, 1)

wesnoth.is_enemy

• wesnoth.is_enemy(side1, side2)

Returns true if side A is enemy of side B, false otherwise.

local enemy_flag = wesnoth.is_enemy(1, 3)

wesnoth.match_side

• wesnoth.match_side(side, filter)

Matches a side against a given StandardSideFilter.

wesnoth.message(tostring(wesnoth.match_side(1, {{"has_unit", { type = "Troll" }}})))

wesnoth.get_starting_location

• wesnoth.get_starting_location(side)

Returns the starting location of the given side.

local loc = wesnoth.get_starting_location(1)
wesnoth.message(string.format("side 1 starts at (%u, %u)", loc[1], loc[2]))

wesnoth.set_side_id

(Version 1.13.7 and later only)

• wesnoth.set_side_id(side, color, flag)

Changes the visual identification of a side. Pass an empty string if you only want to change one of these two attributes.

wesnoth.place_shroud

(Version 1.13.7 and later only)

• wesnoth.place_shroud(side, shroud)

Shrouds the specified hexes. You can pass a shroud_data string (which will be merged with existing shroud), a list of specific locations (where each location is a two-element list of x and y coordinates), or the special string "all" to shroud all hexes.

wesnoth.clear_shroud

(Version 1.13.7 and later only)

• wesnoth.clear_shroud(side, shroud)

Unshrouds the specified hexes. Hexes are specified as with place_shroud, except that a shroud_data string will not work.

wesnoth.is_fogged

(Version 1.13.7 and later only)

• wesnoth.is_fogged(side, location)

Tests if the given location is under fog from the point of view of the given side.

wesnoth.is_shrouded

(Version 1.13.7 and later only)

• wesnoth.is_shrouded(side, location)

Tests if the given location is under shroud from the point of view of the given side.

wesnoth.switch_ai

(Version 1.13.7 and later only)

• wesnoth.switch_ai(side, file)

Replaces a side's AI with the configuration from a specified file.

wesnoth.append_ai

(Version 1.13.7 and later only)

• wesnoth.append_ai(side, params)

Appends AI parameters (aspects, stages, goals) to the side's AI. The syntax for the parameters to be appended is the same as that supported by [modify_side].

wesnoth.add_ai_component

(Version 1.13.7 and later only)

• wesnoth.add_ai_component(side, path, component)

Adds a component to the side's AI. The path syntax is the same as that used by [modify_ai]. The component is the content of the component - it should not contain eg a toplevel [facet] tag.

wesnoth.change_ai_component

(Version 1.13.7 and later only)

• wesnoth.change_ai_component(side, path, component)

Like add_ai_component, but replaces an existing component instead of adding a new one.

wesnoth.delete_ai_component

(Version 1.13.7 and later only)

• wesnoth.delete_ai_component(side, path)

Like add_ai_component, but removes a component instead of adding one.

helper.all_teams

• helper.all_teams()

Returns an iterator over teams that can be used in a for-in loop.

for team in helper.all_teams() do team.gold = 200 end