Fix visual ray flickering?

Help and Feedback Scripting Support
#1

Hello, I have an laser using rays and it seems to flicker (shown in video below)

As you can see from the output the position is changing even if I don’t move. (Second image below)

I have tried black listing the laser part but it didn’t really seem to work.

https://gyazo.com/0db1427b782a4fcb71cc36ff7c93099e

oDL52TF
oDL52TF1060×167 6.73 KB

Client code:
(not all of it)

local LaserPart = Instance.new("Part")
LaserPart.Color = Color3.fromRGB(255, 0, 0)
LaserPart.Anchored = true
LaserPart.CanCollide = false
LaserPart.Parent = workspace

local RayCastParameters = RaycastParams.new()
RayCastParameters.FilterDescendantsInstances = game.Workspace.HappyHome.Home.EyeOfSauron.Eye.Parent:GetChildren()
RayCastParameters.FilterType = Enum.RaycastFilterType.Blacklist



local function castRay(rTarget)

	--print("Target in castRay is set to"..rTarget)

	local laser_Thickness = .5

	local rayOriginPart = Eye
	local rayTargetPart = rTarget



	local origin = rayOriginPart.CFrame.Position
	local rayTarget = rayTargetPart.HumanoidRootPart.CFrame.Position
	local direction = (rayTarget - origin)

	local results = workspace:Raycast(origin, direction, RayCastParameters)

	if not results then
		results = {Position = rayTarget}
	end

	local distance = (results.Position - origin).Magnitude

	LaserPart.Size = Vector3.new(laser_Thickness,laser_Thickness,distance)


	LaserPart.CFrame = CFrame.new(origin, rayTarget - rTarget.Humanoid.MoveDirection * 2) * CFrame.new(0,0, -distance / 2)
	

	--game.ReplicatedStorage.EyeEvent:FireAllClients(origin, rayTarget, distance, LaserPart)
end

local target

EyeEventRemote.OnClientEvent:Connect(function(Target)
	target = Target
end)

RunService.RenderStepped:Connect(function()
	if not target then return end
	castRay(target)
end)
#2

What is “Eye”? Is it a part attached to the player’s head? Can you send a gyazo of the laser in use with the player model?

Also,

Every time this remote event gets fired, a new .RenderStepped event gets connected. If you :FireClient the same player 10 times, there will be 10 RenderStepped events firing every frame doing the same time.

I would recommend to change it to:

EyeEventRemote.OnClientEvent:Connect(function(Target)
	target = Target
end)

RunService.RenderStepped:Connect(function()
	if not target then return end
	castRay(target)
end)

Other than that, we don’t know how you’re currently setting up your model, so we can’t be sure of the issue.

#3

Eye is a model in the workspace :smiley: also thanks let me try that out

#4

It didn’t seem to work, here is what it looks like.

https://gyazo.com/9eb3a2dbf453053a3365d0cd76773a21

#5

Weld an attachment to the player’s character and use a beam for better performance.

#6

I can’t use .touched on a beam can I?

#7

If you are using raycasting to generate the part, why bother with touched event?

#8

I don’t understand what you are saying, to do with this maybe elaborate more?

#9

If you were tracking the player with the raycast part then I recommend beams as replacement, otherwise what would you be using .touched event for?

#10

Dealing damage to the player when they are hit and damaging blocks around it

#11

What is the condition that the player is damaged when the part is raycasted? Must they be moving?

#12

No, they don’t I have to use raycast for what I am doing

#13

The difference is very minuscule which suggests that it may just be some floating point precision error. I would suggest rounding the position to, say, the nearest hundredth or something.

#14

Beams will generate a more fluent laser effect than baseparts, and if you wish to use .touched as hitbox detection then set the part’s transparency to 1.

#15

Um well you i see,why dont you raycast from both the client as visual and from the aerver as the real lazer,this would eliminate replication lag and also be exploiter safe