【引擎触发】道士群体治疗：范围回复与仇恨代价的实现

---beginmagic: 使用技能前触发
function beginmagic(self, maigicID, maigicName, targetObject, x, y)
    if maigicName ~= "群体治疗术" then return end
    local sid = getskillindex("群体治疗术")
    local lv = getskilllevel(self, sid)
    local heal = 45 + lv * 25
    local members = getgroupmember(self) or {}
    for _, mate in ipairs(members) do
        local dx = mate.x - self.x
        local dy = mate.y - self.y
        if dx * dx + dy * dy <= 16 and mate:GetHp() < mate:GetMaxHp() then
            local actual = math.min(heal, mate:GetMaxHp() - mate:GetHp())
            humanhp(mate, "+", actual)
            sendmsg(mate, 1, "获得道士的治疗 " .. actual .. " 点")
        end
    end
end

---治疗仇恨：治疗量的一半计入道士仇恨
function Heal.hate(actor, actual)
    -- 半量转仇恨，救人的风险写进机制
    Hate.add(actor, actual * 0.5)
end

---治疗暴击：10% 概率双倍
function Heal.rollCrit()
    return math.random(1, 100) <= 10
end