local CONST = require 'config.const'
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local Balance = require 'config.balance'
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local M = {}
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-- ---------------------------------------------------------
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-- 刺杀入口
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-- ---------------------------------------------------------
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function M.attempt(attacker, target)
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local cd = attacker:storage_get('kill_cd') or 0
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if cd > 0 then return false end
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if not attacker:is_in_radius(target, Balance.KILL_RANGE) then return false end
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if attacker:storage_get('is_disguising') then return false end
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if attacker:storage_get('is_dragging') then return false end
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if attacker:storage_get('is_attacking') then return false end
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local GameMgr = require 'core.game_manager'
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if GameMgr.get_state() == 'prepare' then return false end
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local backstab = M.is_backstab(attacker, target)
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local windup = backstab and Balance.BACKSTAB_WINDUP or Balance.KILL_WINDUP
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local damage = backstab and Balance.BACKSTAB_DAMAGE or Balance.KILL_DAMAGE
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attacker:play_animation('attack', 1.0, 0, -1, false, true)
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attacker:storage_set('is_attacking', true)
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clicli.timer.wait(windup, function()
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attacker:storage_set('is_attacking', false)
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attacker:stop_cur_animation()
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if not attacker:is_in_radius(target, Balance.KILL_RANGE + 0.5) then
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M.on_miss(attacker)
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return
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end
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if not target:is_alive() then return end
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M.on_hit(attacker, target, damage)
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end)
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return true
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end
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-- ---------------------------------------------------------
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-- 命中处理
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-- ---------------------------------------------------------
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function M.on_hit(attacker, target, damage)
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if target:has_buff_by_key(CONST.BUFF_SHIELD) then
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target:remove_buffs_by_key(CONST.BUFF_SHIELD)
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M.set_cooldown(attacker, Balance.KILL_CD_HIT)
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return
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end
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attacker:damage({
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target = target,
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damage = damage,
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type = CONST.DAMAGE_TYPE_ASSASSINATE,
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no_miss = true,
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})
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local Suspicion = require 'systems.suspicion'
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local witness_count = M.count_witnesses(attacker, 10)
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if witness_count > 0 then
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Suspicion.add(attacker, Balance.SUS_KILL_WITNESSED)
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else
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Suspicion.add(attacker, Balance.SUS_KILL_UNWITNESSED)
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end
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if not target:is_alive() then
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M.set_cooldown(attacker, Balance.KILL_CD_KILL)
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M.on_kill(attacker, target)
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else
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M.set_cooldown(attacker, Balance.KILL_CD_HIT)
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end
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end
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-- ---------------------------------------------------------
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-- 未命中
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-- ---------------------------------------------------------
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function M.on_miss(attacker)
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local Suspicion = require 'systems.suspicion'
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Suspicion.add(attacker, Balance.SUS_KILL_MISS)
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M.set_cooldown(attacker, Balance.KILL_CD_MISS)
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end
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-- ---------------------------------------------------------
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-- 击杀后处理
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-- ---------------------------------------------------------
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function M.on_kill(killer, victim)
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local is_silent = killer:has_buff_by_key(CONST.BUFF_SILENCER)
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if victim:has_tag('npc') then
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victim:add_tag('corpse')
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victim:set_recycle_on_remove(false)
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if not is_silent then
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local NpcMgr = require 'core.npc_manager'
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NpcMgr.trigger_panic(victim:get_point(), Balance.PANIC_RADIUS)
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end
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if is_silent then
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killer:remove_buffs_by_key(CONST.BUFF_SILENCER)
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end
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clicli.timer.wait(Balance.CORPSE_DECAY_TIME, function()
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if victim:has_tag('corpse') and not victim:has_tag('hidden') then
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victim:remove()
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end
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end)
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end
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if victim:has_tag('player_controlled') then
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local PlayerMgr = require 'core.player_manager'
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PlayerMgr.on_player_killed(killer, victim)
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end
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end
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-- ---------------------------------------------------------
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-- 背刺判定
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-- ---------------------------------------------------------
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function M.is_backstab(attacker, target)
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local atk_point = attacker:get_point()
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local tgt_point = target:get_point()
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local tgt_face = target:get_facing()
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local dx = atk_point:get_x() - tgt_point:get_x()
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local dy = atk_point:get_y() - tgt_point:get_y()
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local angle_to_attacker = math.deg(math.atan(dy, dx))
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local diff = math.abs(angle_to_attacker - tgt_face)
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if diff > 180 then diff = 360 - diff end
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return diff > 120
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end
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-- ---------------------------------------------------------
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-- 目击者计数
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-- ---------------------------------------------------------
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function M.count_witnesses(attacker, radius)
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local area = clicli.area.create_circle_area(attacker:get_point(), radius)
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local units = area:get_all_unit_in_area()
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area:remove()
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local count = 0
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for _, u in ipairs(units) do
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if u ~= attacker and u:is_alive() then
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if u:has_tag('player_controlled') or u:has_tag('npc') then
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count = count + 1
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end
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end
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end
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return count
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end
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-- ---------------------------------------------------------
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-- 冷却
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-- ---------------------------------------------------------
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function M.set_cooldown(unit, duration)
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unit:storage_set('kill_cd', duration)
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clicli.timer.wait(duration, function()
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unit:storage_set('kill_cd', 0)
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end)
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end
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return M
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