Help with a knockback roll?

Help and Feedback Scripting Support
#1

Hello everyone.

i was trying to create a knockback roll similar to many battlegrounds games, but i ran into an issue and some… complications?

anyways, when the player hits the ground, the vectorvelocity designed to push the player back actually forces them into the floor. i tried reducing maxforce, except… at that point it wont roll the player back at the desired speed.

here is the module:

local AnimateModule = game:GetService("ReplicatedStorage").AnimationModules.JointAnim

local RollPushBack = {}

function RollPushBack.Push(Humanoid : Humanoid, Velocity : number, Base : Part, Part : Part, Raise : boolean)
	local TS = game:GetService("TweenService")
	local Up : Vector3
	local Down : Vector3
	
	local AnimTable = {
		["Float"] = 'rbxassetid://85016151310429',
		["Land"] = 'rbxassetid://86230451638966'
	}
	
	if Raise == true then
		Up = Vector3.new(0, 30, 0)
		Down = Vector3.new(0, 80, 0)
	else
		Up = Vector3.new(0, 0, 0)
		Down = Vector3.new(0, 80, 0)
	end
	
	local Direction = -((Base["Position"] - Part["Position"])["Unit"] * Velocity) + Up
	local DownTween = -((Base["Position"] - Part["Position"])["Unit"] * Velocity)/1.5 - Down
	local LandedTweenStart = Vector3.new(Direction["X"], 0, Direction["Z"])	
	print(LandedTweenStart)
	local LandedTweenEnd = Vector3.new(0, 0, 0)
	
	local AttachmentZero = Instance.new("Attachment")
	AttachmentZero["Parent"] = Part -- part is the enemy's hrp btw
	
	local LV = Instance.new("LinearVelocity")
	LV["Attachment0"] = AttachmentZero
	LV["MaxForce"] = 100000
	LV["RelativeTo"] = Enum.ActuatorRelativeTo.World
	LV["VectorVelocity"] = Direction
	LV["Parent"] = Part
	LV["ForceLimitsEnabled"] = true
	
	Part["CFrame"] = CFrame.lookAt(Part["Position"], Base["Position"])
	
	local Tween = TS:Create(LV, TweenInfo.new(5, Enum.EasingStyle.Sine, Enum.EasingDirection.Out), {VectorVelocity = DownTween})
	
	
	Tween:Play()
	
	local CastParams = RaycastParams.new()
	CastParams.FilterType = Enum.RaycastFilterType.Include
	CastParams.FilterDescendantsInstances = {workspace.Map}
	
	for _, Animation in pairs(Humanoid["Animator"]:GetPlayingAnimationTracks()) do
		Animation:Stop()
	end
	
	local Float : AnimationTrack = require(AnimateModule).Animate(Humanoid, AnimTable["Float"])
	
	repeat
		wait()
	until Humanoid:GetState() == Enum.HumanoidStateType.Landed or workspace:Raycast(Part["Position"], Vector3.new(0, -3, 0), CastParams)
	
	LV["VectorVelocity"] = LandedTweenStart
	
	for _, Animation in pairs(Humanoid["Animator"]:GetPlayingAnimationTracks()) do
		Animation:Stop()
	end
	
	local Roll : AnimationTrack = require(AnimateModule).Animate(Humanoid, AnimTable["Land"])
	
	local function Rolling()
		local Time = Roll["Length"] - Roll:GetTimeOfKeyframe("SLOWING")
		print(Time)
		local Tween = TS:Create(LV, TweenInfo.new(Time, Enum.EasingStyle.Linear, Enum.EasingDirection.Out), {VectorVelocity = LandedTweenStart})
		Tween:Play()
		
		Tween.Completed:Connect(function()
			LV:Destroy()
			AttachmentZero:Destroy()
		end)
	end
	
	Roll:GetMarkerReachedSignal("Slowing"):Connect(Rolling)
end

return RollPushBack

i can show other parts of this system as well if required.
unfortunatly, i dont know how to screen record on windows.

any assistance is appreciated.

1 Like
#2

Can you describe what knockback roll is more? Maybe try using HumanoidRootPart:ApplyImpulse() or other force methods.

#3

apply impulse only does an initial thing if im correct
if youve played tsb use pinpoint cut with blade master thats basicly the same thing im going for

#4

Windows + G.

You need to apply the force opposite of the player’s humanoid root part look vector

#5

i know that.
im not a complete amutuer.

my script works perfectly fine. as intended. throwing the humanoid into the air works wonderfully. its just, when the humanoid lands a short distance away, it partially pushes the player into the ground.

#6

Im afraid i need to bump this chat due to inactivity. the best way to provide an example of whats happening is making the game public and linking it. let me know if this is necessary.