LinearVelocity sends character flying

pinkowyno · May 16, 2023, 7:57pm

Hello! I was recently working on a tps framework, i tried to do a knockback system, and i was trying to make it so LinearVelocity accumulates speed, as multiple LinearVelocities in a HumanoidRootPart doesn’t accumulate. But then, this happened:

This is in the code, it’s a remote that is executed in the victim’s client when it gets attacked:

local totalKnockback = Vector3.new()

local function onCharacterKnockback(attacker)
	if not plr.Character or not attacker.Character then return end
	
	local knockbackPower = 40
	local direction = (plr.Character.HumanoidRootPart.Position - attacker.Character.HumanoidRootPart.Position).Unit

	local char = plr.Character
	
	print("executing remote")
	
	local force = 800000000
	
	if plr.Character.HumanoidRootPart.Velocity.Magnitude > 0.1 then
		warn("Char magnitude:", plr.Character.HumanoidRootPart.Velocity.Magnitude)
		plr.Character.Humanoid:SetStateEnabled(Enum.HumanoidStateType.Physics, false)
		plr.Character.HumanoidRootPart.Velocity = Vector3.new(0,0,0)
		plr.Character.Humanoid:SetStateEnabled(Enum.HumanoidStateType.Physics, true)
	end
	
	local att = char.HumanoidRootPart:FindFirstChild("KBAttachment")
	local kbVelocityIns = char.HumanoidRootPart:FindFirstChild("KBLinearVelocity")

	if att then att:Destroy() end
	if kbVelocityIns then kbVelocityIns:Destroy() end
	
	local att = Instance.new("Attachment")
	att.Name = "KBAttachment"
	att.Parent = plr.Character.HumanoidRootPart
	
	totalKnockback += direction * knockbackPower
	
	task.spawn(function()
		wait(0.02)
		totalKnockback -= direction * knockbackPower
	end)
	
	print(totalKnockback)
	
	local kbVelocityIns = Instance.new("LinearVelocity")
	kbVelocityIns.Name = "KBLinearVelocity"
	kbVelocityIns.Attachment0 = att
	kbVelocityIns.Parent = plr.Character.HumanoidRootPart
	kbVelocityIns.MaxForce = force
	kbVelocityIns.VectorVelocity = totalKnockback
	
	print(kbVelocityIns.VectorVelocity)
	
	Debris:AddItem(kbVelocityIns, 0.04)
	Debris:AddItem(att, 0.04)
end

Also, i’ve tried to replace totalKnockback and instead, just use (direction * knockbackPower) in the VectorVelocity, and it works, but it keeps being only one knockback at a time, and that’s not the idea

If there’s another way around to make accumulable LinearVelocity please help, as i haven’t found any topic in the DevForum about this…