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ai_helper.get_attackable_enemies: add optional parameter 'avoid_map'

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This commit is contained in:
mattsc 2019-11-28 11:58:13 -08:00
parent 891ca93710
commit f5990b7e95
1 changed files with 16 additions and 1 deletions
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17
data/ai/lua/ai_helper.lua
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@ -1155,6 +1155,7 @@ function ai_helper.get_attackable_enemies(filter, side, cfg)
-- - enemies of the side defined in @side,
-- - not petrified
-- - and visible to the side defined in @cfg.viewing_side.
-- - have at least one adjacent hex that is not inside an area to avoid
-- For speed reasons, this is done separately, rather than calling ai_helper.get_visible_units().
--
-- Optional parameters:
@ -1164,6 +1165,8 @@ function ai_helper.get_attackable_enemies(filter, side, cfg)
-- @side: side number, if side other than current side is to be considered
-- @cfg: table with optional configuration parameters:
-- viewing_side: see comments at beginning of this file. Defaults to @side.
-- avoid_map: if given, an enemy is included only if it does not have at least one
-- adjacent hex outside of avoid_map
side = side or wesnoth.current.side
local viewing_side = cfg and cfg.viewing_side or side
@ -1181,7 +1184,19 @@ function ai_helper.get_attackable_enemies(filter, side, cfg)
and (not unit.status.petrified)
and unit:matches(filter_plus_vision)
then
table.insert(enemies, unit)
local is_avoided = false
if cfg and cfg.avoid_map then
is_avoided = true
for xa,ya in H.adjacent_tiles(unit.x, unit.y) do
if (not cfg.avoid_map:get(xa, ya)) then
is_avoided = false
break
end
end
end
if (not is_avoided) then
table.insert(enemies, unit)
end
end
end