A client made object affecting server parts

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#1

I am making a placement system with a client made sentry, where it is supposed to collide, but not move with non-player parts in the workspace. However, the sentry i spawned seems to be able to move a tree in the client and replicate the movement into the server which is not what I want.

Video showing the problem in detail: https://youtu.be/HIRyKuVUAyQ

This is strange as I clone the sentry in the client, and it moves server stuff

This is the collision group setting for the sentry, and I made it so that the sentry can collide with regular workspace parts, but not other players or sentries
image

Below is the script I use to replicate the sentry:

local function AddPlaceholderSentry(attack)
	RemovePlaceholderSentry()
	
	sentryToSpawn = attack.Sentry.Value:Clone()
	sentryToSpawn.Parent = workspace
	
	for i, object in ipairs(sentryToSpawn:GetDescendants()) do
		if object:IsA("BasePart") then
			PhysicsService:SetPartCollisionGroup(object, "SentryToSpawn")
			object.Material = Enum.Material.ForceField
		end
	end
end

RunService.RenderStepped:Connect(function()
	if not sentryToSpawn then
		return
	end
	
	local result = MouseRaycast(sentryToSpawn)
	local x = result.Position.X
	local y = result.Position.Y + (sentryToSpawn:GetExtentsSize().Y / 2)
	local z = result.Position.Z
	
	local cframe = CFrame.new(x, y, z) * CFrame.Angles(0, math.rad(rotation), 0)
	sentryToSpawn:SetPrimaryPartCFrame(cframe)
end)

Post down in the comments if you could help!

#2

Anchor your trees.

Best regards,
Pinker

#3

other than the trees, moving unanchorable parts would cause an unfair advantage to happen to the player and there may be stuff I don’t want to anchor

Oh yeah it can also push unanchored humanoids as well which is a problem of the sentry, not the trees

think of the unplaced sentry as a ghost that collides with its surrounding objects but cannot move it
is the alternative complicated?

#4

Just make it so the clone cant collide? Or give it a collision group with the ground only.

1 Like
#5

I also want the sentry to collide with the anchored parts on the map that I may add like buildings and trees, but not be able to move them

essentially, unanchored parts are ‘anchored’ on collision with the sentry
is that too much to ask for?

#6

Yk youtube exists… try searching roblox studio placement system

1 Like
#7

Or just make it so the parts aren’t unanchored, where they only unanchor in the situation you want them to. Also implement collison groups so it cant touch npcs.

1 Like
#8

hmm ill try and figure out something