How would I go about making a hitbox for a tweened projectile?

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1

I’m wondering how I should go about making a hitbox for my projectile, and what I should use to register hits because I’ve heard .Touched isnt very accurate.

– My current code

local plr = game.Players.LocalPlayer
local char = script.Parent
local hum = char:WaitForChild("Humanoid")
local humRP = char:WaitForChild("HumanoidRootPart")

local RS = game:GetService("ReplicatedStorage")
local Debris = game:GetService("Debris")
local UIS = game:GetService("UserInputService")
local TS = game:GetService("TweenService")

local debounce = false
local CD = 0

local tpRemote = RS.Remotes.Teleport

local mouse = plr:GetMouse()

local KEY = Enum.KeyCode.V

local raycastParams = RaycastParams.new()
raycastParams.FilterDescendantsInstances = {char}

local camera = workspace.CurrentCamera

local function throwKunai()

	local rayMaxDist = 1500
	local mousePos = UIS:GetMouseLocation()
	local rayOrigin = camera:ViewportPointToRay(mousePos.X, mousePos.Y)

	local raycastResult = workspace:Raycast(rayOrigin.Origin, rayOrigin.Direction * rayMaxDist)
	
	if raycastResult == nil then print("nil")
		return
	end
	
	local kunai = RS.FX.RaijinKunai:Clone()
	local kunaiPosition = humRP.Position
	kunai.Parent = workspace.Map.Ignore
	kunai.CanCollide = false
	kunai.Anchored = true
	kunai.CFrame = CFrame.lookAt(kunaiPosition, raycastResult.Position)  * CFrame.Angles(0, math.rad(-90), math.rad(90))

	local distance = (raycastResult.Position - kunaiPosition).Magnitude -- (Target Position - Object Position)
	local speed = 150
	
	local tweenTime = distance / speed
	
	local objHit = raycastResult.Instance
	
	local tweenInfo = TweenInfo.new(tweenTime, Enum.EasingStyle.Linear, Enum.EasingDirection.In)


	local kunaiDirection =  {Position = raycastResult.Position}

	local tweenKunai = TS:Create(kunai, tweenInfo, kunaiDirection)

	tweenKunai:Play()
	
	print(objHit)
	print("Pressed V")
	
end


UIS.InputBegan:Connect(function(inp, gpe)
	if gpe then return end
	if inp.KeyCode == KEY and not debounce then
		debounce = true
		throwKunai()
		tpRemote:FireServer()
		task.wait(CD)
		debounce = false
	end
end)
2

“Touched isn’t accurate” is a myth that often has to do with not using it right. Touched is for collisions that happen through physics simulation. If you’re relying on tween, it’s likely that your projectile isn’t physically simulated (i.e. it’s anchored), so Touched won’t be great in your case.

Consider ray/shapecasting every frame your projectile is active instead to check for hits.