【进阶实战】装备试穿模拟：试穿属性的预览封装

local function previewEquip(actorName, newEquipId)
    local actor = getplayerbyname(actorName)
    local curAtk = tonumber(getplayvar(actor, "HUMAN", "Atk")) or 0
    local curDef = tonumber(getplayvar(actor, "HUMAN", "Def")) or 0
    local newAtk = curAtk - getSlotBonus(actor, "weapon") +
        getEquipAtk(newEquipId)
    local newDef = curDef - getSlotBonus(actor, "armor") +
        getEquipDef(newEquipId)
    local dAtk = newAtk - curAtk
    local dDef = newDef - curDef
    local arrow = function(v)
        return v >= 0 and ("↑" .. v) or ("↓" .. math.abs(v))
    end
    sendmsg(actor, 1, "试穿预览 攻击" .. arrow(dAtk) ..
        " 防御" .. arrow(dDef))
end

local function colorHint(dAtk, dDef)
    if dAtk > 0 and dDef > 0 then
        return "全属性提升"
    end
    if dAtk < 0 or dDef < 0 then
        return "存在属性下降，请确认"
    end
    return "属性持平"
end