Roblox Studio：如何检测玩家何时离开Region3安全区域？

我借助Phloem实现了检测玩家是否处于Region3区域内的脚本，代码如下：

while true do
    wait(1)
    local partsInregion = game.Workspace:FindPartsInRegion3(region2, nil, 1000)
    for i, part in pairs(partsInregion) do
        if part.Parent:FindFirstChild("Humanoid") ~= nil and part.Parent.Name ~= "NextBot" then
            print("Player found in region"..part.Parent.Name)
            local char = part.Parent
            
            local player = Players:GetPlayerFromCharacter(char)
            local inSafety = player:WaitForChild("inSafety")
            inSafety.Value = "True"
            
            local valueFound = findValue( playersinSafeZone, player)
            if valueFound then
                print(char.Name .."  Is already apart of the safety  table bro")
            else
                print("Putting this guy in the safety table")
                table.insert(playersinSafeZone,player)
            end
            
        end
    end
end

另外还有一个用于查找表中值的findValue()函数：

local playersinSafeZone = {}
-- findTableValue
local function findValue(whichArray, itemName)
    for currentIndex = 1, #whichArray do
        if whichArray[currentIndex] == itemName then
            --返回当前索引
            return currentIndex
        end
    end
end

我知道需要检查安全表中的玩家是否未被区域检测函数识别到，从而关闭inSafety值，但不清楚如何将该逻辑整合到脚本中。

解决方案 #

核心思路是每次检测区域内玩家后，对比安全表中的玩家，找出已离开区域的玩家并更新状态。具体实现如下：

local Players = game:GetService("Players")
local playersinSafeZone = {}

-- 查找表中值的函数
local function findValue(whichArray, itemName)
    for currentIndex = 1, #whichArray do
        if whichArray[currentIndex] == itemName then
            return currentIndex
        end
    end
end

while true do
    wait(1)
    local partsInregion = game.Workspace:FindPartsInRegion3(region2, nil, 1000)
    -- 临时哈希表，快速记录当前区域内的玩家
    local currentRegionPlayers = {}

    -- 处理进入区域的玩家，更新状态并加入临时表
    for i, part in pairs(partsInregion) do
        if part.Parent:FindFirstChild("Humanoid") ~= nil and part.Parent.Name ~= "NextBot" then
            local char = part.Parent
            local player = Players:GetPlayerFromCharacter(char)
            if player then
                print("Player found in region: " .. char.Name)
                local inSafety = player:WaitForChild("inSafety")
                inSafety.Value = "True"
                
                local valueFound = findValue(playersinSafeZone, player)
                if not valueFound then
                    print("Putting " .. char.Name .. " in the safety table")
                    table.insert(playersinSafeZone, player)
                else
                    print(char.Name .. " is already in the safety table")
                end
                -- 将玩家加入临时哈希表，用于后续对比
                currentRegionPlayers[player] = true
            end
        end
    end

    -- 检查安全表中已离开区域的玩家，倒序遍历避免索引错乱
    for i = #playersinSafeZone, 1, -1 do
        local player = playersinSafeZone[i]
        -- 若玩家不在当前区域的临时表中，说明已离开
        if not currentRegionPlayers[player] then
            print(player.Name .. " has left the safe zone")
            local inSafety = player:FindFirstChild("inSafety")
            if inSafety then
                inSafety.Value = "False"
            end
            -- 从安全表中移除该玩家
            table.remove(playersinSafeZone, i)
        end
    end
end

关键细节说明 #

• 用**哈希表currentRegionPlayers**替代循环查找，大幅提升玩家存在性判断的效率
• 倒序遍历安全表移除元素，避免正向遍历时因元素删除导致的索引错位问题
• 增加player存在性判断，避免空引用报错

内容的提问来源于stack exchange，提问作者Coder10101