Nerp

Interpolation for server driven transforms and the server stamps a CFrame with a time, the client buffers it and plays it back slightly late, so 20Hz of updates becomes continuous motion at your framerate.

It does not do any networking. You simple send the batch, then you receive it.

[image: Nerp smoothing a streamed CF]

Install

Wally

[dependencies]
Nerp = "superdupernairobi/nerp@0.1.0"

Studio users: download Nerp.rbxm from the latest releasse and right click ReplicatedStorage and pick Insert > Import Roblox Model

Use

local Nerp = require(game:GetService("ReplicatedStorage").Nerp)

local store = Nerp.new(20, "SMOOTH") -- OR LOW_LATENCY
store:track(workspace.with_nerp)
store:start()

remote.OnClientEvent:Connect(function(t, cf)
    store:feed(workspace.with_nerp:GetFullName(), { { t = t, cf = cf } })
end)

The delay is a multiple and not a time

"SMOOTH" is two samples of intervals, "LOW_LATENCY" is one and a half, so, at 20Hz that is 100ms and 75ms.

Basically, two intervals leaves one whole sample of slack, so a single late packet still has a pair to interpolate between. At one interval the clock sits on the newest sample and any jitter pushes it past the end, which is where extrapolation starts. LOW_LATENCY is the one that can extrapolate, so it is for close combat and not for vehicles.

What it isn't

No lag comp, no bandwidth work, no camera, no prediction, Roblox already interpolates player characters, so Neerp does not do that by default.

Links

• Docs: https://superdupernairobi.github.io/Nerp/
• Wally: https://wally.run/package/superdupernairobi/nerp