Linear Velocity lagging on the server? But not the client?

Help and Feedback Scripting Support
#1

Hello, this is a repost because my last post about this wasnt giving too much information. I am making a roll script, that uses Linear Velocity to move the player. But the problem is that the linear velocity only looks smooth on the client. On the server and to other players, it looks like a teleport and is laggy.

https://medal.tv/games/roblox/clips/vsh4p3ErzUuc3/d13373YrOVt5?invite=cr-MSxqZ1gsODE2MTQ0ODEs - clip of it happening

local script -

local UIS = game:GetService("UserInputService")
local keyStates = {}
local keysToTrack = { [Enum.KeyCode.A]=true, [Enum.KeyCode.D]=true, [Enum.KeyCode.W]=true, [Enum.KeyCode.S]=true }

UIS.InputBegan:Connect(function(inputObj, processed)
	if processed then return end
	if keysToTrack[inputObj.KeyCode] then
		keyStates[inputObj.KeyCode] = true
	end
	if inputObj.KeyCode == Enum.KeyCode.Q then
		if keyStates[Enum.KeyCode.A] then
			print("A")
			game.ReplicatedStorage.RemoteEvents.RollEvent:FireServer("Left")
		elseif keyStates[Enum.KeyCode.D] then
			game.ReplicatedStorage.RemoteEvents.RollEvent:FireServer("Right")
		elseif keyStates[Enum.KeyCode.W] then
			game.ReplicatedStorage.RemoteEvents.RollEvent:FireServer("Foward")
		elseif keyStates[Enum.KeyCode.S] then
			game.ReplicatedStorage.RemoteEvents.RollEvent:FireServer("Back")
		else
			game.ReplicatedStorage.RemoteEvents.RollEvent:FireServer("Back")
		end
	end	
end)

UIS.InputEnded:Connect(function(inputObj, processed)
	if keysToTrack[inputObj.KeyCode] then
		keyStates[inputObj.KeyCode] = false
	end
end)

server script

local cd = {}

game.ReplicatedStorage.RemoteEvents.RollEvent.OnServerEvent:Connect(function(plr, rolltype)
	if not table.find(cd, plr.Name) then
		table.insert(cd, plr.Name)
		cd[plr.Name] = false
	end

	if cd[plr.Name] == true then return end
	if plr.Character.Status:FindFirstChild("Stun") then return end
	if plr.Character.Status:FindFirstChild("M1") then return end
	if plr.Character.Status:FindFirstChild("Parry") then return end
	if plr.Character.Status:FindFirstChild("Roll") then return end
	cd[plr.Name] = true
	
	local char = plr.Character
	local humanoid = char.Humanoid
	
	humanoid:SetStateEnabled(Enum.HumanoidStateType.Ragdoll, false)
	
	if plr.Character.Status:FindFirstChild("Blocking") then
		plr.Character.Status.Blocking:Destroy()
		for i, v in pairs(plr.Character.Humanoid:FindFirstChild("Animator"):GetPlayingAnimationTracks()) do
			if v.Name == "VigilSwordBlock" then
				v:Stop()
				humanoid.WalkSpeed = 16
			end
		end
	end
	
	if rolltype == "Left" then
		
		-----------------------------------------------------
		
		local anim = game.ReplicatedStorage.Animations.LeftRoll
		local animloaded = humanoid:FindFirstChild("Animator"):LoadAnimation(anim)

		--animloaded:Play()
		local rollf = Instance.new("Folder", plr.Character.Status)
		rollf.Name = "Roll"

		local a = Instance.new("Attachment", char.HumanoidRootPart)
		a.Name = "A0"
		a.Orientation = Vector3.new(0, 0, 0)

		local lv = Instance.new("LinearVelocity", plr.Character.HumanoidRootPart)
		lv.MaxForce = 100000
		lv.RelativeTo = "Attachment0"
		lv.Attachment0 = char.HumanoidRootPart.A0
		lv.VelocityConstraintMode = Enum.VelocityConstraintMode.Line
		lv.LineDirection = Vector3.new(1, 0, 0)
		lv.LineVelocity = -45
		char.Humanoid.JumpPower = 0
		char.Humanoid.WalkSpeed = 0
		if char.Status:FindFirstChild("Sprinting") then
			char.Status.Sprinting:Destroy()
		end
		
		local connect
		
		connect = char.Status.ChildRemoved:Connect(function(instance)
			if instance.Name == "Roll" then
				local anim2 = game.ReplicatedStorage.Animations.RollCancel
				local animloaded2 = humanoid:FindFirstChild("Animator"):LoadAnimation(anim2)
				animloaded2:Play()
				if plr.Character.HumanoidRootPart:FindFirstChild("LinearVelocity") then
					plr.Character.HumanoidRootPart.LinearVelocity:Destroy()
				end
				if plr.Character.HumanoidRootPart:FindFirstChild("A0") then
					plr.Character.HumanoidRootPart.A0:Destroy()
				end
				local rcf = Instance.new("Folder", plr.Character.Status)
				rcf.Name = "RollCancel"
				game.Debris:AddItem(rcf, 0.25)
				local rcif = Instance.new("Folder", plr.Character.Status)
				rcif.Name = "RCiFrames"
				game.Debris:AddItem(rcif, 0.25)
				char.Humanoid.JumpPower = 50
				char.Humanoid.WalkSpeed = plr.Stats.BaseWalkspeed.Value
				connect:Disconnect()
			end
		end)

		task.wait(0.04)

		local rollif = Instance.new("Folder", plr.Character.Status)
		rollif.Name = "RiFrames"

		task.wait(0.24)

		connect:Disconnect()
		
		if plr.Character.Status:FindFirstChild("RiFrames") then
			plr.Character.Status.RiFrames:Destroy()
		end

		if plr.Character.Status:FindFirstChild("Roll") then
			plr.Character.Status.Roll:Destroy()
		end
		if plr.Character.HumanoidRootPart:FindFirstChild("LinearVelocity") then
			plr.Character.HumanoidRootPart.LinearVelocity:Destroy()
		end
		if plr.Character.HumanoidRootPart:FindFirstChild("A0") then
			plr.Character.HumanoidRootPart.A0:Destroy()
		end
		char.Humanoid.JumpPower = 50
		char.Humanoid.WalkSpeed = plr.Stats.BaseWalkspeed.Value
		
	elseif rolltype == "Right" then
		
		-----------------------------------------------------
		
		local anim = game.ReplicatedStorage.Animations.LeftRoll
		local animloaded = humanoid:FindFirstChild("Animator"):LoadAnimation(anim)

		--animloaded:Play()
		local rollf = Instance.new("Folder", plr.Character.Status)
		rollf.Name = "Roll"

		local a = Instance.new("Attachment", char.HumanoidRootPart)
		a.Name = "A0"
		a.Orientation = Vector3.new(0, 0, 0)

		local lv = Instance.new("LinearVelocity", plr.Character.HumanoidRootPart)
		lv.MaxForce = 100000
		lv.RelativeTo = "Attachment0"
		lv.Attachment0 = char.HumanoidRootPart.A0
		lv.VelocityConstraintMode = Enum.VelocityConstraintMode.Line
		lv.LineDirection = Vector3.new(1, 0, 0)
		lv.LineVelocity = 45
		char.Humanoid.JumpPower = 0
		char.Humanoid.WalkSpeed = 0
		if char.Status:FindFirstChild("Sprinting") then
			char.Status.Sprinting:Destroy()
		end

		local connect

		connect = char.Status.ChildRemoved:Connect(function(instance)
			if instance.Name == "Roll" then
				local anim2 = game.ReplicatedStorage.Animations.RollCancel
				local animloaded2 = humanoid:FindFirstChild("Animator"):LoadAnimation(anim2)
				animloaded2:Play()
				if plr.Character.HumanoidRootPart:FindFirstChild("LinearVelocity") then
					plr.Character.HumanoidRootPart.LinearVelocity:Destroy()
				end
				if plr.Character.HumanoidRootPart:FindFirstChild("A0") then
					plr.Character.HumanoidRootPart.A0:Destroy()
				end
				local rcf = Instance.new("Folder", plr.Character.Status)
				rcf.Name = "RollCancel"
				game.Debris:AddItem(rcf, 0.25)
				local rcif = Instance.new("Folder", plr.Character.Status)
				rcif.Name = "RCiFrames"
				game.Debris:AddItem(rcif, 0.25)
				char.Humanoid.JumpPower = 50
				char.Humanoid.WalkSpeed = plr.Stats.BaseWalkspeed.Value
				connect:Disconnect()
			end
		end)

		task.wait(0.04)

		local rollif = Instance.new("Folder", plr.Character.Status)
		rollif.Name = "RiFrames"

		task.wait(0.24)
		
		connect:Disconnect()

		if plr.Character.Status:FindFirstChild("RiFrames") then
			plr.Character.Status.RiFrames:Destroy()
		end

		if plr.Character.Status:FindFirstChild("Roll") then
			plr.Character.Status.Roll:Destroy()
		end
		if plr.Character.HumanoidRootPart:FindFirstChild("LinearVelocity") then
			plr.Character.HumanoidRootPart.LinearVelocity:Destroy()
		end
		if plr.Character.HumanoidRootPart:FindFirstChild("A0") then
			plr.Character.HumanoidRootPart.A0:Destroy()
		end
		
		char.Humanoid.JumpPower = 50
		char.Humanoid.WalkSpeed = plr.Stats.BaseWalkspeed.Value
		
	elseif rolltype == "Foward" then
		
		-----------------------------------------------------
		
		local anim = game.ReplicatedStorage.Animations.LeftRoll
		local animloaded = humanoid:FindFirstChild("Animator"):LoadAnimation(anim)

		--animloaded:Play()
		local rollf = Instance.new("Folder", plr.Character.Status)
		rollf.Name = "Roll"
		
		local a = Instance.new("Attachment", char.HumanoidRootPart)
		a.Name = "A0"
		a.Orientation = Vector3.new(0, -90, 0)

		local lv = Instance.new("LinearVelocity", plr.Character.HumanoidRootPart)
		lv.MaxForce = 100000
		lv.RelativeTo = "Attachment0"
		lv.Attachment0 = char.HumanoidRootPart.A0
		lv.VelocityConstraintMode = Enum.VelocityConstraintMode.Line
		lv.LineDirection = Vector3.new(1, 0, 0)
		lv.LineVelocity = -45
		char.Humanoid.JumpPower = 0
		char.Humanoid.WalkSpeed = 0
		if char.Status:FindFirstChild("Sprinting") then
			char.Status.Sprinting:Destroy()
		end
		
		

		local connect

		connect = char.Status.ChildRemoved:Connect(function(instance)
			if instance.Name == "Roll" then
				local anim2 = game.ReplicatedStorage.Animations.RollCancel
				local animloaded2 = humanoid:FindFirstChild("Animator"):LoadAnimation(anim2)
				animloaded2:Play()
				if plr.Character.HumanoidRootPart:FindFirstChild("LinearVelocity") then
					plr.Character.HumanoidRootPart.LinearVelocity:Destroy()
				end
				if plr.Character.HumanoidRootPart:FindFirstChild("A0") then
					plr.Character.HumanoidRootPart.A0:Destroy()
				end
				local rcf = Instance.new("Folder", plr.Character.Status)
				rcf.Name = "RollCancel"
				game.Debris:AddItem(rcf, 0.25)
				local rcif = Instance.new("Folder", plr.Character.Status)
				rcif.Name = "RCiFrames"
				game.Debris:AddItem(rcif, 0.25)
				char.Humanoid.JumpPower = 50
				char.Humanoid.WalkSpeed = plr.Stats.BaseWalkspeed.Value
				connect:Disconnect()
			end
		end)
		
		task.wait(0.04)

		local rollif = Instance.new("Folder", plr.Character.Status)
		rollif.Name = "RiFrames"

		task.wait(0.24)

		connect:Disconnect()
		
		if plr.Character.Status:FindFirstChild("RiFrames") then
			plr.Character.Status.RiFrames:Destroy()
		end
		
		if plr.Character.Status:FindFirstChild("Roll") then
			plr.Character.Status.Roll:Destroy()
		end
		if plr.Character.HumanoidRootPart:FindFirstChild("LinearVelocity") then
			plr.Character.HumanoidRootPart.LinearVelocity:Destroy()
		end
		if plr.Character.HumanoidRootPart:FindFirstChild("A0") then
			plr.Character.HumanoidRootPart.A0:Destroy()
		end
		
		char.Humanoid.JumpPower = 50
		char.Humanoid.WalkSpeed = plr.Stats.BaseWalkspeed.Value
		
	elseif rolltype == "Back" then
		
		-----------------------------------------------------
		
		local anim = game.ReplicatedStorage.Animations.LeftRoll
		local animloaded = humanoid:FindFirstChild("Animator"):LoadAnimation(anim)

		--animloaded:Play()
		local rollf = Instance.new("Folder", plr.Character.Status)
		rollf.Name = "Roll"

		local a = Instance.new("Attachment", char.HumanoidRootPart)
		a.Name = "A0"
		a.Orientation = Vector3.new(0, -90, 0)

		local lv = Instance.new("LinearVelocity", plr.Character.HumanoidRootPart)
		lv.MaxForce = 100000
		lv.RelativeTo = "Attachment0"
		lv.Attachment0 = char.HumanoidRootPart.A0
		lv.VelocityConstraintMode = Enum.VelocityConstraintMode.Line
		lv.LineDirection = Vector3.new(1, 0, 0)
		lv.LineVelocity = 45
		char.Humanoid.JumpPower = 0
		char.Humanoid.WalkSpeed = 0
		if char.Status:FindFirstChild("Sprinting") then
			char.Status.Sprinting:Destroy()
		end

		local connect

		connect = char.Status.ChildRemoved:Connect(function(instance)
			if instance.Name == "Roll" then
				local anim2 = game.ReplicatedStorage.Animations.RollCancel
				local animloaded2 = humanoid:FindFirstChild("Animator"):LoadAnimation(anim2)
				animloaded2:Play()
				if plr.Character.HumanoidRootPart:FindFirstChild("LinearVelocity") then
					plr.Character.HumanoidRootPart.LinearVelocity:Destroy()
				end
				if plr.Character.HumanoidRootPart:FindFirstChild("A0") then
					plr.Character.HumanoidRootPart.A0:Destroy()
				end
				local rcf = Instance.new("Folder", plr.Character.Status)
				rcf.Name = "RollCancel"
				game.Debris:AddItem(rcf, 0.25)
				local rcif = Instance.new("Folder", plr.Character.Status)
				rcif.Name = "RCiFrames"
				game.Debris:AddItem(rcif, 0.25)
				char.Humanoid.JumpPower = 50
				char.Humanoid.WalkSpeed = plr.Stats.BaseWalkspeed.Value
				connect:Disconnect()
			end
		end)
		
		task.wait(0.04)
		
		local rollif = Instance.new("Folder", plr.Character.Status)
		rollif.Name = "RiFrames"
		
		task.wait(0.24)
		
		connect:Disconnect()
		
		if plr.Character.Status:FindFirstChild("RiFrames") then
			plr.Character.Status.RiFrames:Destroy()
		end
		if plr.Character.Status:FindFirstChild("Roll") then
			plr.Character.Status.Roll:Destroy()
		end
		if plr.Character.HumanoidRootPart:FindFirstChild("LinearVelocity") then
			plr.Character.HumanoidRootPart.LinearVelocity:Destroy()
		end
		if plr.Character.HumanoidRootPart:FindFirstChild("A0") then
			plr.Character.HumanoidRootPart.A0:Destroy()
		end
		
		char.Humanoid.JumpPower = 50
		char.Humanoid.WalkSpeed = plr.Stats.BaseWalkspeed.Value
		
	end
	
	task.wait(1.8)
    cd[plr.Name] = false
end)

i am very confused on this problem so I need help. Also because of the fact that im inserting the Linear Velocity from the server? but its only not laggy on the client?

2 Likes
Linear Velocity set to Line looks like teleporting to others
#2

Would setting the network owner to the player before the roll work?

#3

i tried it, but it made wasd have a 5 second delay before moving the character

#4

What if you put it in a separate script?

#5

Like put the linear velocity in a different script?

#6

Oh…
I just realized I thought I was replying to a different post than I thought I was.

Forget the putting it in a separate script part.
What if you have the network owner as the player the entire time?

#7

The reason it might be lagging is because you are creating the LinearVelocity on the Server instead of the Client. Creating it on the client works better if the player is lagging.

3 Likes
Help With Dummy [NPC] and Player Physics
#8

but would other players see people roll if I add it to the client?

#9

It will replicate. Physics applied to the character will always replicate over even without the object existing on the server

2 Likes
#10

Yes because the Player owns the Character parts (like as a network owner).

#11

Using bodyvelocity or linearvelocity on the server delays the projectile in the beginning and maybe some other issues which I forgot and the final solution is to create a moving projectile that is invisible in the server and a moving projectile that is visible in the client so that the projectile can always be smooth in the client and accurate with lower performance cost though it is tedious to do on the server and the client, but that’s the only way to use them properly.