【界面UI】寻路路径预览线：点击目的地的虚线渲染与回收

local dots = {}
local function drawPath(path)
    clearPath()
    local n = math.min(#path, 40)
    for i = 1, n do
        local dot = GUI:Text_Create(mapLayer, "pd" .. i, path[i].x, path[i].y, "·", 16, { 120, 220, 255 })
        dots[#dots + 1] = dot
    end
end
local function clearPath()
    for _, d in ipairs(dots) do
        GUI:removeFromParent(d)
    end
    dots = {}
end

SL:RegisterLuaNetMsg(6801, function(data)
    local step = tonumber(data.step) or 0
    if dots[step] ~= nil then
        GUI:removeFromParent(dots[step])
        dots[step] = nil
    end
    if step >= 40 then clearPath() end
end)