LinearVelocity is laggy

[shinonWasTaken (shinon)]

just finished this “Jumpad” and “Barrier” code that basically pushes the player away everytime its in contact with the player.

however as you can see its very laggy when seen from another player, but its very smooth when seen by the server

local debugging = false

local jumpHeight = 50 --// How much force will the player have
local cooldown = 0.5 --// How much time until the player stops floating

--//Scripting...
local rayPartConfig = require(script.RayLaserConfig)
local CollectionService = game:GetService("CollectionService") 
--// Locals^

--// Touch Check
debounce = false
local function onTag(tag)
	tag.Touched:Connect(function(hit)
		if not debounce then
			debounce = true
			if (hit.Parent:FindFirstChild('Humanoid')~=nil) then
				local char = hit.Parent
				local HRP = char:FindFirstChild('HumanoidRootPart')		
				if debounce then
					--// Checking for what the player is currently touching and if its the parent of this script.
					--// Code goes here
					local target = hit.Parent:FindFirstChild('HumanoidRootPart')
					local rayOrigin = hit.Parent.PrimaryPart.CFrame.Position
					local rayDirection = tag.CFrame.Position - rayOrigin
					local raycastParams = RaycastParams.new()
					raycastParams.FilterDescendantsInstances = {hit.Parent}
					raycastParams.FilterType = Enum.RaycastFilterType.Blacklist
					raycastParams.IgnoreWater = true
					local raycastResult = workspace:Raycast(rayOrigin, rayDirection, raycastParams)

					if raycastResult then
						if raycastResult.Normal then
							local raycastNormal = raycastResult.Normal
							local Att0 = Instance.new('Attachment'):Clone()
							local linearVelocity = Instance.new('LinearVelocity'):Clone()

							Att0.Name = 'linearVelocityAtt0'
							Att0.Parent = HRP
							linearVelocity.VelocityConstraintMode = 'Line'
							linearVelocity.RelativeTo = 'World'
							linearVelocity.LineDirection = raycastNormal
							linearVelocity.LineVelocity = jumpHeight
							linearVelocity.MaxForce = 100000
							linearVelocity.Attachment0 = Att0
							linearVelocity.Name = 'jumpadLForce'
							linearVelocity.Parent = HRP

							if debugging then
								--//Visual Ray
								local rayPart = rayPartConfig.Part:Clone()
								local rayPE = rayPartConfig.PE:Clone()
								local rayBeam = rayPartConfig.Beam:Clone()
								local rayAtt0 = rayPartConfig.Att0:Clone()
								local rayAtt1 = rayPartConfig.Att1:Clone()
								--//Locals^

								rayPE.Parent = rayAtt0
								rayBeam.Parent = rayPart
								rayAtt0.Parent = rayPart
								rayAtt1.Parent = target
								rayBeam.Attachment0 = rayAtt0
								rayBeam.Attachment1 = rayAtt1
								rayPart.Parent = workspace
								local rayPart = workspace:FindFirstChild('rayPart')
								rayPart.Position = raycastResult.Position
								rayPart.CFrame = CFrame.lookAt(rayPart.Position, target.CFrame.Position)
								task.wait(0.05)
								workspace:FindFirstChild('rayPart'):Destroy()
								rayAtt1:Destroy()

								print('['..tag.Name..']',hit.Parent.Name,'bounced off',tag.Name,'at',linearVelocity.LineVelocity,'LineVelocity','from',raycastResult.Distance,'studs')

							end

							if CollectionService:HasTag(tag,"Tag_Barrier") then
								task.wait(cooldown/2)
								linearVelocity:Destroy()
								Att0:Destroy()
							end

							if CollectionService:HasTag(tag,"Tag_Jumpad") then
								task.wait(cooldown)
								linearVelocity:Destroy()
								Att0:Destroy()
							end

							--//^
						end
					end

				end
			end
			debounce = false
		end
	end)
end

--// Tag Check
for _, part in (CollectionService:GetTagged("Tag_Jumpad")) do
	onTag(part)
end

for _, part in (CollectionService:GetTagged("Tag_Barrier")) do
	onTag(part)
end

CollectionService:GetInstanceAddedSignal("Tag_Jumpad"):Connect(function(jumpad)
	onTag(jumpad)
end)

CollectionService:GetInstanceAddedSignal("Tag_Barrier"):Connect(function(barrier)
	onTag(barrier)
end)

what could be causing this issue?

[SubtotalAnt8185]

This is currently an issue with LinearVelocity and is why many people didn’t switch to it and kept using BodyVelocity.

Currently, the only fix I know of is to set the network owner of the player on the jump pad to the server.

[shinonWasTaken (shinon)]

any idea if that could cause any issue at all?

[SubtotalAnt8185]

It would make the client a little more laggy but it shouldn’t cause very many issues if you use the humanoid physics system.

[shinonWasTaken (shinon)]

ill just use bodyvelocity , any common issues with bodyvelocity that i should know about?

[SubtotalAnt8185]

Nothing much, just that it has existed since 2006 and that it is now deprecated.

[lysandr (Joey)]

Going to have to be honest, the legacy BodyMovers are still proving more useful during my development than the new ones. Things like RocketPropulsion I have yet to find an alternative for in the new BodyMovers.

So yeah I’d probably switch back to the legacy BodyVelocity until Roblox polishes the new alternatives. (Years from now probably lol)

[MysteryOfHyper]

Don’t know why roblox refuses to fix this. Bodyvelocity obviously is doing it right so why can’t linearvelocity (a NEWER version) do it properly?

[shinonWasTaken (shinon)]

btw I completely separated the code into a server script and a local script, if anybody was curious about the code and wanted to use it for their own games here you go, you’ll need to use Tag Editor though I heavily suggest to just wait for the Studio Tag Editor that Roblox will be adding soon!

and just a heads-up the barrier uses like 2 modules and its kind of long blablabla, just do a barrier yourself with this code if that’s what you want, or just ask me if you really need it.

DO NOT rotate the part at all, put an attachment inside of the jumppad part and put it where you want the player to go, the script will do the rest, however if you know more than me then feel free to edit the script to whatever you need it to do, i made it this way because i work with a friend and i dont want him to have the need to edit the script and rather just simply move the attachment.

ServerScript for the jumpads:

local debugging = false

--//Scripting...
local CollectionService = game:GetService("CollectionService") 
--// Locals^

local function onJumpPad(tag, hit)
   local debounce = false
   if not debounce then
   	debounce = true
   	task.spawn(function()
   	local char = hit.Parent
   	local HRP = char:FindFirstChild('HumanoidRootPart')	
   	local Att0 = Instance.new('Attachment'):Clone()
   	local bodyVelocity = Instance.new('BodyVelocity'):Clone()
   	local cooldown = tag:GetAttribute("Cooldown")

   	local attDistance = tag:FindFirstChild('attDistance')

   	Att0.Name = 'linearVelocityAtt0'
   	Att0.Parent = HRP
   	bodyVelocity.P = 3000
   	bodyVelocity.MaxForce = Vector3.new(400000000, 400000000, 400000000)
   	bodyVelocity.Velocity = attDistance.CFrame.Position*2
   	bodyVelocity.Name = 'jumpadLForce'
   	bodyVelocity.Parent = HRP
   		
   		task.wait(0.1)
   			bodyVelocity:Destroy()
   			Att0:Destroy()
   			debounce = false
   	
   	end)
   end
end

local function onTagJumpPad(tag)
   tag.Touched:Connect(function(hit)
   	if (hit.Parent:FindFirstChild('Humanoid')~=nil) then
   		task.spawn(function()
   			local char = hit.Parent
   			local HRP = char:FindFirstChild('HumanoidRootPart')		
   			local rayOrigin = hit.Parent.PrimaryPart.CFrame.Position
   			local rayDirection = tag.CFrame.Position - rayOrigin
   			local raycastParams = RaycastParams.new()
   			raycastParams.FilterDescendantsInstances = {hit.Parent}
   			raycastParams.FilterType = Enum.RaycastFilterType.Blacklist
   			raycastParams.IgnoreWater = true
   			local raycastResult = workspace:Raycast(rayOrigin, rayDirection, raycastParams)

   			if raycastResult then
   				if raycastResult.Normal then
   					if (hit.Parent:FindFirstChild('Humanoid')~=nil) then
   						if CollectionService:HasTag(tag, 'Tag_JumpPad') then
   							onJumpPad(tag, hit)
   							end
   					end
   				end
   			end
   		end)
   	end
   end)
end

--// Tag Check
for _, part in (CollectionService:GetTagged('Tag_JumpPad') do
   onTagJumpPad(part)
   part.Orientation = Vector3.new(0,0,0) --//(in case my dumb brain rotates one of them and have no clue why they arent working properly)
end

CollectionService:GetInstanceAddedSignal('Tag_JumpPad'):Connect(function(jumpad)
   onTagJumpPad(jumpad)
   jumpad.Orientation = Vector3.new(0,0,0) --//(in case my dumb brain rotates one of them and have no clue why they arent working properly)
end)

I’m very new at coding so if you see any issues do tell me, I would love to learn more.