AssemblyLinearVelocity Bug

Help and Feedback Scripting Support
1

You can write your topic however you want, but you need to answer these questions:

  1. What do you want to achieve? Keep it simple and clear!
    In my soccer game I made a steal move. When you press e, you dash forward and tackle the player.

  2. What is the issue? Include screenshots / videos if possible!
    Right when the tackle is over, the screen shakes for a millisecond and jitters like I teleported

  3. What solutions have you tried so far? Did you look for solutions on the Developer Hub?
    Reviewing code/searching online

player.Character:WaitForChild("HumanoidRootPart"):SetNetworkOwner(nil)

	player.Character:WaitForChild("HumanoidRootPart").AssemblyLinearVelocity = player.Character:WaitForChild("HumanoidRootPart").CFrame.lookVector * 400



	

	local touchedEvent = stealHitbox.Touched:Connect(function(hit)
		
		if hit.Parent:FindFirstChild("Ball") and hit.Parent:FindFirstChild("Humanoid") and hit.Parent.Name ~= player.Name and hit.Parent:FindFirstChild("HumanoidRootPart"):FindFirstChild("Ball") then
			if hit.Parent.Ball.CanSteal.Value == false then
				return
			end
			hit.Parent.HumanoidRootPart:WaitForChild("Ball"):Destroy()
			hit.Parent.Ball.PossessorName.Value = player.Name
			hit.Parent.Ball.InPossession.Value = true
			local motor6D = Instance.new("Motor6D")
			motor6D.Part0 = player.Character:WaitForChild("HumanoidRootPart")
			hit.Parent:FindFirstChild("Ball").Parent = player.Character
			motor6D.Part1 = player.Character:FindFirstChild("Ball")
			motor6D.Parent = player.Character.HumanoidRootPart
			motor6D.Name = "Ball"
	
		end
	end)
	task.wait(player.Character.StealCooldown.Value * 0.25)
	player.Character:WaitForChild("HumanoidRootPart"):SetNetworkOwner(player)

(part of code which makes it slide)

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-- This is an example Lua code block

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1 Like
2

This is because of the sudden change in network ownership, where the transfer in physics control causes a very brief jitter since client and server have very different physics states. Try removing the network owner lines

3

without the network owner lines, the assembly linear velocity change is ignored

4

Assuming this is a server script, you won’t be able to change the HumanoidRootPart’s (HRP) AssemblyLinearVelocity outside of the player’s network ownership – and you’re solving that by setting the HRP’s network owner to the server.

As you can see, that switch-up causes a noticeable jitter/lag. I’d recommend figuring out a way so that

player.Character:WaitForChild("HumanoidRootPart").AssemblyLinearVelocity = player.Character:WaitForChild("HumanoidRootPart").CFrame.lookVector * 400

runs on the client itself, rather than the server.

5

before moving it to the server, i had this line in the script and the player didnt move