How would I add height to my Knockback Script

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#1

Hi!
So currently my function makes the enemy go up when hit (works very well), but I tried making it so they get knocked back but also a bit knocked up, but I can’t manage to do it.
Here’s my code

Module.Knockback = function(Character, Target, Config)
	if not Character or not Target then return end
	if Target.Parent == workspace:WaitForChild("NPCs") then return end
	if Config.Knockback == false then return end
	local Root = Character:WaitForChild("HumanoidRootPart")
	local TargetRoot = Target:WaitForChild("HumanoidRootPart")
	if Root and TargetRoot then
		local BV = Instance.new("BodyVelocity")
		BV.P = Config.Knockback_P
		BV.MaxForce = Config.Knockback_MaxForce
		local Direction = (Root.Position - TargetRoot.Position).Unit
		BV.Velocity = -Direction * Config.Knockback_Strength
		BV.Parent = TargetRoot
		game:GetService("Debris"):AddItem(BV, Config.Knockback_Lifetime)
	end
end

How would I make the enemy go up a bit?

#2

this is what i’ve tried, but it does not work

Module.Knockback = function(Character, Target, Config)
	if not Character or not Target then return end
	if Target.Parent == workspace:WaitForChild("NPCs") then return end
	if Config.Knockback == false then return end
	local Root = Character:WaitForChild("HumanoidRootPart")
	local TargetRoot = Target:WaitForChild("HumanoidRootPart")
	if Root and TargetRoot then
		local BV = Instance.new("BodyVelocity")
		BV.P = Config.Knockback_P
		BV.MaxForce = Config.Knockback_MaxForce
		local Direction = (Root.Position - TargetRoot.Position).Unit
		BV.Velocity = (-Direction * Config.Knockback_Strength) + Vector3.new(0,Config.KnockbackHeight,0) -- here is the error
		BV.Parent = TargetRoot
		game:GetService("Debris"):AddItem(BV, Config.Knockback_Lifetime)
	end
end
#3

what is the actual error in the output? screenshot please ;D

1 Like
#4

BV.MaxForce is likely not overcoming the strength of gravity. You should increase MaxForce to (gravity * mass of the object ) * Knockup scaling factor. A knockup scaling factor of 2 would make the object be accelerated upwards (increase in upwards velocity to the upwards BodyVelocity target speed) at the rate at which gravity accelerates objects downwards when falling.

You should use two LinearVelocity (BodyVelocity) parts for this, because the force of the X, Z linear knockback will be too strong compared to the Y force which needs to overcome gravity. Also note that if you do not multiply -Direction by the (1, 0, 1) vector then it will detract from the vertical velocity of the knockback on the target, whether that’s your intention or not.

1 Like
#5

You could simply use :ApplyImpulse() on the humanoid root part no ?

#6

There is no error showing in the output
it knocks the enemy back (which is good) but not up when I add Vector3.new(0,30,0) to the velocity