Running RenderStepped loops

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#1

I am tryin to make a laser attachment script and i’m currently having trouble making the laser raycast smooth. I tried using wait() but it seems to be choppy. How do I use renderstepped in place of wait()? Also does having RenderStepped loops lag the game?

function lazr(active)
	if active then
	connection = rs.RenderStepped:Connect(function()
		local Beam = Instance.new("Part", game.Workspace.ignore)
		Beam.Anchored = true
		Beam.CanCollide = false
		Beam.Color = script.Colour.Value
		Beam.Material = Enum.Material.Neon
		Beam.Name = "LaserBeam"

		local Raycast = Ray.new(script.Parent.CFrame.p, script.Parent.CFrame.LookVector * 500)
		local Part, Position = game.Workspace:FindPartOnRayWithIgnoreList(Raycast, {script.Parent, Beam}, false, true)

		local Distance = (script.Parent.CFrame.p - Position).Magnitude
		Beam.Size = Vector3.new(0.05, 0.05, Distance)
			Beam.CFrame = CFrame.new(script.Parent.CFrame.p, Position) * CFrame.new(0, 0, -Distance/2)
			wait() -- need to be replaced
			Beam:Destroy()
		end)
	else
		if connection then connection:Disconnect()
		end
	end
end
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#2

use rs.Heartbeat:Wait() in place of the wait. You could also use task.wait() since it doesn’t throttle like wait, but I believe Heartbeat is faster.

#3

There are two main use cases for RunService:

Server:
[Heartbeat only]
RS.Heartbeat:Wait() and RS.Heartbeat:Connect(function()

Client:
[RenderStepped and Heartbeat]
RS.RenderStepped:Wait() and RS.RenderStepped:Connect(function()
RS.Heartbeat:Wait() and RS.Heartbeat:Connect(function()

The client model, RenderStepped, runs faster and is recommended for camera and character code. You can use RenderStepped for raycasting, but it may lead to performance throttling.

I recommend doing raycasting on the client, this will reduce server delay and improve client accuracy. I also recommend you use workspace:Raycast() instead of Ray.new(), it is a more recent raycasting method and doesn’t require a ray object.

local RS = game:GetService("RunService")
RS.Heartbeat:Connect(function()
    -- Code here runs every frame following internal physics simulation.
end)

local RS = game:GetService("RunService")
RS.RenderStepped:Connect(function()
    -- Code here runs before every frame.
    -- Frame doesn't load until after RS finishes. (Throttles internal processes!)
end)
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