Constant movement on a large model creates extreme lag

Help and Feedback Scripting Support
1

I’m making a game about a train, and the background (composed of ~1500 parts at its minimum) moves instead of the train to create the illusion of movement. I did this because moving the train would cause players to lag, awkwardly fling around the place, and there would be no way to reset the train to stop it from going into infinity. My script works, but it creates a TON of lag. I understand this is due to the repetition and the way the script runs every frame. How could I optimize it to run better?

This script runs clientside.

-- This script tweens rails, terrain, and decoratins.
local ServerScriptService = game:GetService("ServerScriptService")
local TweenService = game:GetService("TweenService")
local RunService = game:GetService("RunService")

local snapMoving = workspace.SnapMoving
local primaryPart = snapMoving.PrimaryPart
local primaryPartLocs = {}

-- This bit makes a table of all of the different places primaryPart will be moved to.
for x = 1, 7, .875 do
	primaryPartLocs[#primaryPartLocs+1] = CFrame.new(primaryPart.Position.X, primaryPart.Position.Y, primaryPart.Position.Z + x)
end

-- AAAAAAAH!!! Running this piece of GARBAGE uses 25% of the CPU! It exists to move the entire model with all 1428 parts. Real taxing.
while true do
	for x = 1, 7 do
		snapMoving:SetPrimaryPartCFrame(primaryPartLocs[x])
		RunService.Heartbeat:Wait()
	end
end
1 Like
2

Move the train thats the only possible efficient way to dp it. Firgure out how to make the player stick. Use welds

3

Have you tried using :PivotTo? Maybe BulkMoveTo?

4

Still less efficient than moving the train but it works

5

I believe a lot of games move the background rather than the player, for example that new Poppy Playtime game’s ending’s train.

6

I dont play roblox but just because other games do it doesn’t make it efficient. You dont know how ma y parts they are moving

7

BulkMoveTo is meant to handle many, many parts.

https://developer.roblox.com/en-us/api-reference/function/WorldRoot/BulkMoveTo

2 Likes
8

If I moved the train, I’d have to repeatedly teleport it backwards to stop it from going out of bounds and getting floating point error. I’d also have to rewrite the default player movement script which I need to act as similarly as possible to classic movement.

9

Just read the docs on BulkMoveTo. Seems like the perfect thing for my situation. I’ll create a table containing every single location every part in my model will possibly be throughout the animation, and then will repeatedly use BulkMoveTo.

https://developer.roblox.com/en-us/api-reference/function/WorldRoot/BulkMoveTo