Tween is Spazzing out

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#1

Hello, I am trying to tween the position of a fire ball so that it moves in the direction that the camera is facing, however for what ever reason the tween starts glitching as it moves – can someone please tell me how to fix this?
Here is my script:

local function shoot_blast()
		
		local blast_info = TweenInfo.new(
			3,
			Enum.EasingStyle.Quint,
			Enum.EasingDirection.Out,
			0,
			false,
			0
		)
		
		local goals = {
			Position = hrp.Position + lookVector.Unit*200
		}
		
		local tween = TweenService:Create(blast_clone, blast_info, goals)
		
		tween:Play()
	end

Here is a video of what’s happening:

2 Likes
#2

hmm. maybe the goal is being altered by another script? check the goal position using the print() function. if the value doesnt change while the glitching, its a tween problem, if it does, then its probably being altered by another script, or by different parts of the same script. i tried to reproduce the problem on my client, but the tween seems to be working fine

#3

Anchor your fireball, its not anchored thats why its falling down.

Fixed code (If needed) 
local function shoot_blast()

		blast_clone.Anchored = true -- this line we've added.

		local blast_info = TweenInfo.new(
			3,
			Enum.EasingStyle.Quint,
			Enum.EasingDirection.Out,
			0,
			false,
			0
		)
		
		local goals = {
			Position = hrp.Position + lookVector.Unit*200
		}
		
		local tween = TweenService:Create(blast_clone, blast_info, goals)
		
		tween:Play()
	end
1 Like
#4

Like said above, tweens can get haywire if you don’t anchor your targeted part

#5

That works, however the Touched() function isn’t registering when I have it anchored for some reason. Here is the entire script:

local rs = game.ReplicatedStorage
local fire_blast = rs:WaitForChild("fireblast")
local blast = rs:WaitForChild("blast")

local TweenService = game:GetService("TweenService")

fire_blast.OnServerEvent:Connect(function(player, lookVector)
	local char = player.Character
	local blast_clone = blast:Clone()
	local hrp = char:WaitForChild("HumanoidRootPart")
	--local lookVector = hrp.CFrame.LookVector (if I want it to be based on where the player is facing instead of camera)

	--- try tweening blast
	
	hrp.Anchored = true
	
	local function blast_startup()

		local blast_info = TweenInfo.new(
			1, --duration
			Enum.EasingStyle.Elastic,
			Enum.EasingDirection.Out,
			0, -- number of repeats
			false,
			0 -- delay
		)

		local goals = {
			Size = Vector3.new(5,5,5);
			Transparency = 0
		}

		local tween = TweenService:Create(blast_clone, blast_info, goals)

		tween:Play()
	end
	
	local function shoot_blast()
		
		local blast_info = TweenInfo.new(
			3,
			Enum.EasingStyle.Quint,
			Enum.EasingDirection.Out,
			0,
			false,
			0
		)
		
		local goals = {
			CFrame = CFrame.new(hrp.Position + lookVector.Unit*200)
		}
		
		local tween = TweenService:Create(blast_clone, blast_info, goals)
		
		tween:Play()
	end
	
	local function blast_exit()

		local blast_info = TweenInfo.new(
			1, --duration
			Enum.EasingStyle.Elastic,
			Enum.EasingDirection.In,
			0, -- number of repeats
			false,
			0 -- delay
		)

		local goals = {
			Size = Vector3.new(1,1,1);
			Transparency = 1
		}

		local tween = TweenService:Create(blast_clone, blast_info, goals)

		tween:Play()
	end

	blast_clone.Parent = game.Workspace
	blast_clone.Position = hrp.Position + lookVector*10
	blast_clone.CanCollide = false

	local at = Instance.new("Attachment", blast_clone)
	at.Name = "Attachment0"
	at.Position = Vector3.new(0,0,0)
	

	blast_clone.Anchored = true
	blast_startup()
	wait(1)
	shoot_blast()
	hrp.Anchored = false
	

	blast_clone.Touched:Connect(function(hit)
		print("Touched")
	end)

	wait(2)
	if blast_clone then
		blast_exit()
		wait(1)
		blast_clone:Destroy()
	end
end)

If it is not anchored, the Touched() function works normally, but if it is then nothing happens and it just phases right through objects without the Touched() registering.

#6

Make sure CanTouch is set to true. (checked)
image

and since its a fireball, make can collide to false (unchecked)
image

This is how it looks:
image

#7

Apparently the problem is with Roblox’s physics engine. For what ever reason, while tweens are anchored and moving their .Touched() stops working – I don’t know why Roblox thought that was a good idea, but they did.

Although it may not be the most efficient fix, I found that continuously utilizing :GetTouchingParts() then using a nested pairs loop while the tween is in motion works best.

1 Like