Character has different position in server and client

[builder_seller]

1. What do you want to achieve?

I have a Part, which freezes players when they touch it.

2. What is the issue?

I get code from Quoteory. Here is his code.

Implementation : When player touches the part, character’s parts are anchored, server creates a ice-like Part, whose Cframe is set to character’s Cframe.

When I tested in Studio, the client looks like this:

The server looks like this:

There are two problems:

• Major One: Client and server looks different. In Client, character is not in the Ice Part.
• Miner One: The character hasn’t touche the part, but he is frozen. ( I didn’t realize this issue until I write this post)

3. What solutions have you tried so far?

I searched on forum. I get the impression that this has something to do with physics engine in Roblox. But I fail to find further information.

I am new to Roblox, any instruction would be nice. Thx !

Code (I changed a little bit from the original one to suit my spec):

local Part = script.Parent

local FROZEN_LOCK = 2
local FROZEN_TIME = 2

local IceBlock = Instance.new("Part")
IceBlock.BrickColor = BrickColor.new("Baby blue")
IceBlock.Size = Vector3.new(5, 7, 5)
IceBlock.Transparency = 0.5
IceBlock.Anchored = true

local Frozen = {} -- we will use this to store all of our frozen characters

function isCharacterFrozen(character, frozenTable)
	if frozenTable[character] then
		return true
	end
	return false
end

function CharAnchor(Character, AnchorBool) -- anchor will be true or false
	for _, CharacterPart in pairs(Character:GetChildren()) do
		if CharacterPart:IsA("BasePart") then -- if the child is a basepart so we don't try to anchor scripts etc and get an error
			CharacterPart.Anchored = AnchorBool
		end
	end
end

function FreezeCharacter(Character)
	CharAnchor(Character, true) -- anchor the character
	local IceBlockClone = IceBlock:Clone()
	IceBlockClone.Parent = workspace
	IceBlockClone.CFrame = Character.PrimaryPart.CFrame -- move the IceBlock to the character

	Frozen[Character] = IceBlockClone -- index the character with the new IceBlock
end

function UnFreezeCharacter(Character)
	local IceBlock = Frozen[Character] -- Checks if the Character is frozen
	if IceBlock then 
		IceBlock:Destroy()
		CharAnchor(Character, false)
	end
end

function removeFrozenLock(Character)
	Frozen[Character] = nil
end

Part.Touched:Connect(function(hit)
	
	local hitParent = hit.Parent
	local humanoid = hitParent:FindFirstChildWhichIsA("Humanoid")

	if not humanoid then
		return
	end

	local isFrozen = isCharacterFrozen(hitParent, Frozen)
	if isFrozen then
		return
	end

	FreezeCharacter(hitParent)

	wait(FROZEN_TIME)
	
	UnFreezeCharacter(hitParent)

	wait(FROZEN_LOCK)
	removeFrozenLock(hitParent)
end)

[sniper74will]

this problem should be an easy fix, after you make the ice, set the players position back to the ice.

[xxIamInevitable (FARKS_GAMING)]

You should probably freeze the player before you add in the ice block.

[Quoteory]

Firing the client with a remote event telling them to set their own position back to where the server sees them at works great for me

Client

Server

FreezeServer in ServerScriptService

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local Players = game:GetService("Players")
local freezeEvent = ReplicatedStorage.FreezeEvent

local freezePart = Instance.new("Part")
freezePart.Size = Vector3.new(7, 13, 7)
freezePart.Anchored = true
freezePart.BrickColor = BrickColor.Blue()
freezePart.Transparency = .5

local frozenCharacters = {}

local function anchor(character, bool)
	for _, part in ipairs(character:GetChildren()) do
		if part:IsA("BasePart") then
			part.Anchored = bool
		end
	end
end

local function freeze(character)
	if not frozenCharacters[character] then
		frozenCharacters[character] = true
		local player = Players:GetPlayerFromCharacter(character)
		local cframe = character.PrimaryPart.CFrame
		freezeEvent:FireClient(player, cframe)
		anchor(character, true)
		local freezePart = freezePart:Clone()
		freezePart.CFrame = cframe
		freezePart.Name = character.Name .. "FreezePart"
		freezePart.Parent = workspace
	end
end

local function thaw(character)
	if frozenCharacters[character] then
		frozenCharacters[character] = nil
		local player = Players:GetPlayerFromCharacter(character)
		freezeEvent:FireClient(player)
		local freezePart = workspace:FindFirstChild(character.Name .. "FreezePart")
		if freezePart then freezePart:Destroy() end
		anchor(character, false)
	end
end


Players.PlayerAdded:Connect(function(player)
	local function onCharacterAdded(character)
		wait(12)
		freeze(character)
		wait(12)
		thaw(character)
	end
	onCharacterAdded(player.Character or player.CharacterAdded:Wait())
	player.CharacterAdded:Connect(onCharacterAdded)
end)

FreezeClient in StarterCharacterScripts

local ReplicatedStorage = game:GetService("ReplicatedStorage")
local freezeEvent = ReplicatedStorage:WaitForChild("FreezeEvent")

local character = script.Parent
local primaryPart = character.PrimaryPart

freezeEvent.OnClientEvent:Connect(function(cframe)
	character:SetPrimaryPartCFrame(cframe)	
end)

and a FreezeEvent RemoteEvent in ReplicatedStorage

Demo place file Freeze.rbxl (21.8 KB)
(freezes characters 12 seconds after they spawn, and then thaws them 12 seconds after)

Issues: the only issue I noticed is minor animation desyncage between server and client on freeze, but I don’t think it’s that big of an issue

I didn’t do a ton of testing so there are possibilities of bugs, if so just reply and ill fix them asap

[xxIamInevitable (FARKS_GAMING)]

Though the player being out of place off the ice shouldn’t really be much of a problem. The player still can’t move and they can’t abuse anything with it.

[Quoteory]

It’s not a security problem, it’s a visual one

The player appearing to be outside of the ice while frozen does not look good

[builder_seller]

Quoteory! Thank You!
You are so kind and helpful.

This is my first post, you help me twice

I will try your solution when I am back home.

And thank everyone else. Roblox community is awesome!