Getting a Part from all the models in workplace for raycasting

Help and Feedback Scripting Support
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1

Hi everyone, so I am creating a sensor system on a bus that can detect humanoid or a part called ‘BusTouched’ which is placed at the rear in the body of all my buses, It has visual and audio alert system in placed too. When I first started, I did a simple script using Touched:Connect. It did work but I face issues such as when a tween service is on going nearby, it will disturb the Touched:Connect causing a looping of the warning sound until the tween service has stopped. So I decided to change the script and use raycast to detect the part named ‘BusTouched’. However I am now stuck, the script below. Line 7 is the problem, the “workspace.Parent.Parent.BusTouched”. I am not sure what to type in there to get all the bus model with the part ‘BusTouched’ to be whitelisted. The grouping of the A-chassis for the bus is below the script.

local sensor = script.Parent

local origin = sensor.Position
local direction = sensor.CFrame.LookVector * 88

local raycastParams = RaycastParams.new()
raycastParams.FilterDescendantsInstances = {workspace.Parent.Parent.BusTouched}
raycastParams.FilterType = Enum.RaycastFilterType.Whitelist

local raycastResult = workspace:Raycast(origin, direction, raycastParams)

if raycastResult then
	script.Parent.Parent.Parent.Display.Screen.Collision:Play()
	script.Parent.Parent.Parent.Display.Screen.SurfaceGui.RedHeadway.Visible = true
	wait(0.25)
	script.Parent.Parent.Parent.Display.Screen.SurfaceGui.RedHeadway.Visible = false
	wait(0.25)
	script.Parent.Parent.Parent.Display.Screen.SurfaceGui.RedHeadway.Visible = true
	wait(0.25)
	script.Parent.Parent.Parent.Display.Screen.SurfaceGui.RedHeadway.Visible = false
	wait(0.25)
	script.Parent.Parent.Parent.Display.Screen.SurfaceGui.RedHeadway.Visible = true
	wait(0.1)
end

Screen Shot 2022-11-10 at 12.33.40 PM

I’ve tried using :GetDecendents but I am not sure how I can put it in to the raycast script and make it work.

2

CollectionService is great for this. Just tag all the parts you want with e.g. “BusWarningVolume”, then do

local TagS = game:GetService("CollectionService")
...
raycastParams.FilterDescendantsInstances = TagS:GetTagged("BusWarningVolume")
3

hm I am not sure where I am doing wrong as I’ve already tagged all the parts that needed to be whitelisted but i got this error message in the output when I paste the script in the command bar below. I’ve also tried putting samples of the tagged part in the workplace and it still did not detect it.

local tagS = game:GetService("CollectionService")

local sensor = script.Parent

local origin = sensor.Position
local direction = sensor.CFrame.LookVector * 88

local raycastParams = RaycastParams.new()
raycastParams.FilterDescendantsInstances = tagS:GetT:3: attempt to index nil with 'Parent'```
4

Uhhh not sure what’s going with that??