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Joe 2026-02-02 14:05:11 -06:00
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.cursor/rules/roblox/chat/examples/proximity-chat.md
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---
title: Proximity-based chat
description: Learn how to implement exclusive chat for users who are close to each other in locations using the TextChatService.
---
This example shows how to implement an exclusive chat for users who are near each other in the 3D world. It extends the callback with a function using `Class.TextSource` to identify the locations of a user who might be a potential message receiver. If this function returns `false`, it means that the user locates further than the preset valid range from the message sender, so the system doesn't deliver the message to that user.
Add the following to a `Class.Script` in `Class.ServerScriptService`:
```lua title="Server"
local TextChatService = game:GetService("TextChatService")
local Players = game:GetService("Players")
-- Get the chat channel for proximity-based chat
-- You can replace this general channel with a dedicated channel
local generalChannel: TextChannel = TextChatService:WaitForChild("TextChannels").RBXGeneral
-- Function to get the position of a user's character
local function getPositionFromUserId(userId: number)
-- Get the player associated with the given user ID
local targetPlayer = Players:GetPlayerByUserId(userId)
-- If the player exists, get their character's position
if targetPlayer then
local targetCharacter = targetPlayer.Character
if targetCharacter then
return targetCharacter:GetPivot().Position
end
end
-- Return a default position if the player or character cannot be found
return Vector3.zero
end
-- Set the callback for the general channel to control message delivery
generalChannel.ShouldDeliverCallback = function(textChatMessage: TextChatMessage, targetTextSource: TextSource)
-- Get the positions of the message sender and target
local sourcePos = getPositionFromUserId(textChatMessage.TextSource.UserId)
local targetPos = getPositionFromUserId(targetTextSource.UserId)
-- Deliver message if distance between sender and target is less than 50 units
return (targetPos - sourcePos).Magnitude < 50
end
```