LinearVelocity "teleport/skipping" on knockback

[egidijus1979 (Chad)]

I have been trying to make a knockback system in my combat game. The thing is, whenever this rush move gets used, everything is okay, apart from how the knockback/linear velocity acts. The knockback should happen from where the player attacking faces, but the enemy usually sinks into the floor a bit, then sort of jolts and instantly teleports a bit forward. I am confused on how to solve this.

Here is what is happening:

External Media

Here is the code below:

local collectionService = game:GetService("CollectionService")

coolerMove1Remote.OnServerEvent:Connect(function(client, rushData)
	local c = rushData.Character
	local enemyPart = rushData.Target.HumanoidRootPart
	local enemyHuman = rushData.Target.Humanoid
	local hrp = c.HumanoidRootPart
	enemyHuman:TakeDamage(20)
	local enemyLookVector = hrp.CFrame.LookVector * -1
	if rushData.Action == "Rushed" then
		c.Humanoid.AutoRotate = false
		local lv = Instance.new("LinearVelocity")
		local a0 = Instance.new("Attachment")
		lv.Attachment0 = a0
		lv.Parent = a0
		a0.Parent = enemyPart
		lv.MaxForce = math.huge
		lv.VectorVelocity = enemyLookVector * -75
		if rushData.Target then
			lv.VectorVelocity = enemyLookVector * -75
			coolerMove1Remote:FireClient(client, "TargetFound")
			lv:Destroy()
			a0:Destroy()
		end
		task.wait(.2)
		enemyPart.CFrame = hrp.CFrame:ToWorldSpace(CFrame.new(0,0,-2))
		c.Humanoid.AutoRotate = true
		task.wait(.6)
		local attachment = Instance.new("Attachment")
		attachment.Parent = enemyPart
		local lv = Instance.new("LinearVelocity")
		lv.Parent = attachment     
		lv.MaxForce = math.huge
		lv.VectorVelocity = enemyLookVector * -60
		lv.Attachment0 = attachment
		game.Debris:AddItem(attachment, .5)
		game.Debris:AddItem(lv,.5)
	end	
end)

I want to mostly want to understand whether I do not have a basic understanding of linear velocity, because I only just started trying to use linear velocity, so I need help seeing what is causing this problem.

[LOCK3DOOR]

Try getting rid of the Y Vector3 on the LinearVelocity because the look vector could have negative Y in it making the NPC go into the ground.

-- Replace both lines with this
lv.MaxForce = Vector3.new(math.huge, 0, math.huge)

[egidijus1979 (Chad)]

That wouldn’t work though would it? Because its a Vector3 and not a number?

[egidijus1979 (Chad)]

Alright, I found the solution. Getting rid of the Y Vector3 on LinearVelocity idea helped me.

I had to make the Linear Velocity ForceLimitMode to be PerAxis.
I had to also add a VelocityConstraintMode to be Vector.
Then this makes me have to use MaxAxesForce and not MaxForce since MaxForce is a number while MaxAxesForce allows for each of the Axis.

Code below that I needed to replace/add:

lv.ForceLimitMode = 1
lv.VelocityConstraintMode = 2
lv.MaxAxesForce = Vector3.new(math.huge, 0, math.huge)

Thanks for the help/idea! I was very unknowledgeable to Linear Velocities but that idea helped me find out more about Linear Velocity.