Animation works, Knockback does not

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#1

Hello! I have made a knockback system stretching over 3 scripts. However, I cannot get it to conflict knockback on the recipient, but the animation for the Invoker plays perfectly fine.

Invoker Local 
local Players = game:GetService("Players")
local LPlr = Players.LocalPlayer
local char = LPlr.Character or LPlr.CharacterAdded:Wait()
local Animator = char:WaitForChild("Humanoid"):FindFirstChildWhichIsA("Animator")
local ImputS = game:GetService("UserInputService")
local RepStore = game:GetService("ReplicatedStorage")
local kEvent = RepStore.Events.KnockbackM
local Mouse = LPlr:GetMouse()
local Tool = script.Parent
local AnimationID = "rbxassetid://8388173238"

function SendReq()
	local Tar = Mouse.Target

	if Tar and Tar.Parent:FindFirstChild("Humanoid") then
		local Animation = Instance.new("Animation")
		Animation.AnimationId = AnimationID
		local punch = Animator:LoadAnimation(Animation)
		punch:Play()
		kEvent:FireServer(Tar.Parent.PrimaryPart)
	end

end




Tool.Activated:Connect(function() local suc, err = pcall(SendReq) if not suc then warn(err) end end)
Server script 
local Event = game.ReplicatedStorage.Events.KnockbackM
local KnockbackE = game.ReplicatedStorage.Events.GetKnockback


Event.OnServerEvent:Connect(function(Plr, Target)
	local Player = game.Players:GetPlayerFromCharacter(Target) or game.Players:GetPlayerFromCharacter(Target.Parent)
	if Player then
		KnockbackE:FireClient(Player,"Verified")
	end
end)
Recipient Local 
local KnockBack = game.ReplicatedStorage.Events.GetKnockback
local LPlr = game.Players.LocalPlayer

local Character = LPlr.CharacterAdded:Wait() or LPlr.Character

local Event = KnockBack
local MaxForce = Vector3.new(80000, 80000, 80000)
local Speed = 20

Event.OnClientEvent:Connect(function(Key)
	if Key == "Verified" then

		if Character and Character:FindFirstChild("HumanoidRootPart") then
			local Vel = Instance.new("BodyVelocity")
			Vel.Parent = Character.PrimaryPart
			Vel.MaxForce = MaxForce
			Vel.P = 10
			Vel.Velocity = Character.HumanoidRootPart.LookVector * Speed
		end
	end
end)
3 Likes
#2

I would say that this is why it doesn’t knockback. Since you created the body velocity on the client, it doesn’t replicate on the server for anti-exploit reasons.

Instead, I would use :ApplyImpulse() on the primary part since its easier to use and more efficient. All you need to do is pass in the vector3 velocity you have as an argument.

1 Like
#3

I will try using :ApplyImpulse()

#4

I would really recommend doing the knockback on the server side as an exploiter could very easily disable the knockback for their character.

#5

This is my new script, but still doesn’t work.

I added raycasting instead of mouse.Target, so that the punch will effect the person directly infront of the player.

Local

local Players = game:GetService("Players")
local LPlr = Players.LocalPlayer
local char = LPlr.Character or LPlr.CharacterAdded:Wait()
local Animator = char:WaitForChild("Humanoid"):FindFirstChildWhichIsA("Animator")
local ImputS = game:GetService("UserInputService")
local RepStore = game:GetService("ReplicatedStorage")
local kEvent = RepStore.Events.KnockbackM
local AnimationID = "rbxassetid://8388173238"
local KC = Enum.KeyCode.P
local Humanoid = char:FindFirstChildWhichIsA("Humanoid")

local CurrentState = Enum.HumanoidStateType.Running

Humanoid.StateChanged:Connect(function(_,new)
	CurrentState = new.EnumType
end)



ImputS.InputBegan:Connect(function(InputO) if InputO.KeyCode == KC then local suc, err = pcall(function()
			if CurrentState ~= Enum.HumanoidStateType.Climbing then
				local NRay = workspace:Raycast(LPlr.Character.PrimaryPart.Position,LPlr.Character.PrimaryPart.CFrame.LookVector*90)
				if NRay then
					local tar = NRay.Instance
					local dis = NRay.Distance
					local Animation = Instance.new("Animation")
					Animation.AnimationId = AnimationID
					local punch = Animator:LoadAnimation(Animation)
					if tar.Parent:FindFirstChild("Humanoid") and dis<10 then
						punch:Play()
						kEvent:FireServer(tar.Parent)
					end
					
				end
			end
		end) if not suc then warn(err) end
	end
end)

Server

local KnockBack = game.ReplicatedStorage.Events.KnockbackM
local LPlr = game.Players.LocalPlayer



local Event = KnockBack


Event.OnServerEvent:Connect(function(Character)
	if Character and Character:FindFirstChild("HumanoidRootPart") then
		Character.PrimaryPart:ApplyImpulse(Character.HumanoidRootPart.LookVector * Speed)
	end
	
end)
#6

I changed the raycast to this, so that the player’s own character would be ignored. Now it actually detected the player and does the animation, but no knockback

				local RParams = RaycastParams.new()
				RParams.FilterType = Enum.RaycastFilterType.Blacklist
				RParams.FilterDescendantsInstances = {char}
				local NRay = workspace:Raycast(char.PrimaryPart.Position,char.PrimaryPart.CFrame.LookVector*90,RParams)