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--[[
Basic stroll ai
--]]
local STROLL_TIMEOUT = 20
local STROLL_TIMEOUT_RANDOMNESS = 10
-- Wrapping the monster update callback in order to do the stroll ai here
local old_on_update = MonsterClass.on_update
local update_functions = {}
function MonsterClass:on_update(callback)
update_functions[self] = callback
end
local stroll_timer = {}
local angerlist = {}
local mob_config = require "scripts/monster/settings"
local function find_target(mob, config)
local target
local target_priority
local attack_x, attack_y
for _, being in ipairs(get_beings_in_circle(mob, config.trackrange)) do
if being:type() == OBJECT_CHARACTER
and being:action() ~= ACTION_DEAD
then
local anger = angerlist[being] or 0
if anger == 0 and config.aggressive then
anger = 1
end
local possible_attack_positions = {
{
x = being:x() - config.attack_distance or TILESIZE,
y = being:y()
},
{
x = being:x()
y = being:y() - config.attack_distance or TILESIZE,
},
{
x = being:x() + config.attack_distance or TILESIZE,
y = being:y(),
},
{
x = being:x()
y = being:y() + config.attack_distance or TILESIZE,
},
}
for _, point in ipairs(possible_attack_positions) do
local priority = calculate_position_priority(mob:position(), point.x, point.y)
end
end
end
end
local function stroll_update(mob, tick)
local stroll_tick = stroll_timer[mob]
local mobconfig = mob_config[mob:name()]
local trackrange = mobconfig and mobconfig.trackrange or nil
local strollrange = mobconfig and mobconfig.strollrange or nil
if (not stroll_tick or stroll_tick <= tick) and strollrange then
local x, y = mob:position()
local destination_x = math.random(x - strollrange, x + strollrange)
local destination_y = math.random(y - strollrange, y + strollrange)
if is_walkable(destination_x, destination_y) then
mob:walk(destination_x, destination_y)
end
stroll_timer[mob] = tick + STROLL_TIMEOUT
+ math.random(STROLL_TIMEOUT_RANDOMNESS)
end
local monsterclass = get_monster_class(mob:monster_id())
local update_function = update_functions[monsterclass]
if update_function then
return update_function(mob, tick)
end
end
-- Register all update functions for strolling
for _, monsterclass in ipairs(get_monster_classes()) do
old_on_update(monsterclass, stroll_update)
end
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