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Configure props with attributes

v2 · Activity 2 of 4 · attributes · configuration · 28 min Requires Roblox Studio

Chapter outline

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Mini-mission

Attributes are named values attached to Instances. GetAttribute returns the authored value or nil. Use Properties to add a numeric Brightness attribute to each lamp.

Configuration is still data. Check its type and range before assigning it to a light property. A missing value gets a documented default; a negative value is not useful brightness.

Your task

For each LampA and LampB, create a PointLight child if needed. Read Brightness, use 1 if missing/wrong-type, and clamp valid numbers to 0..5. Set Range 12.

Interface: Complete the documented Studio hierarchy and self-check the behavior outside the browser.

Input	Expected

See another example

local raw = part:GetAttribute("Range")
local range = type(raw) == "number" and math.max(0, raw) or 12

The fallback handles missing or wrong-type configuration. The numeric branch validates the lower boundary.

Syntax in this activity

New syntax: attributes, configuration

Earlier ideas used here

modules
require

Your explanation

Self-check rubric

Missing configuration uses the documented default.
Set Brightness to 9; next Play clamps it to 5.
Set a text attribute value; next Play uses 1.

Your explanation is a self-check. Exact wording is not automatically graded.

Self-checked Studio exercise. A saved checklist records your own review; no uploaded place file or screenshot is executed here.

Build this hierarchy

Workspace/LampA (Part, Brightness number attribute=2)
Workspace/LampB (Part, no Brightness attribute)
ServerScriptService/ConfigureLights (Script, RunContext=Server)

Build two anchored lamp Parts.
Add a numeric Brightness attribute of 2 to LampA in Properties. Leave LampB absent.

ServerScriptService/ConfigureLights.server.luau

Main guided reference implementation; use the hierarchy’s stated Script or ModuleScript type.

local Workspace = game:GetService("Workspace")
local function configure(part)
    local raw = part:GetAttribute("Brightness")
    local brightness = 1
    if type(raw) == "number" and raw == raw and math.abs(raw) < math.huge then brightness = math.min(5, math.max(0, raw)) end
    local light = part:FindFirstChildOfClass("PointLight") or Instance.new("PointLight")
    light.Brightness = brightness
    light.Range = 12
    light.Parent = part
    print(part.Name, brightness)
end
configure(Workspace:WaitForChild("LampA"))
configure(Workspace:WaitForChild("LampB"))

Expected output

LampA PointLight brightness is 2; LampB brightness is 1.
Each light has Range 12.

Studio assessment checklist

Missing configuration uses the documented default.Set Brightness to 9; next Play clamps it to 5.Set a text attribute value; next Play uses 1.

Multiplayer tests

Run a local server and at least one client; compare server and client context where the activity uses both.

Troubleshooting and production considerations

An attribute and a property are different namespaces. GetAttribute reads the custom attribute.

The fallback must happen before assigning a nil or incompatible type to PointLight.Brightness.

This is a bounded learning lab. It has not been executed in an approved Roblox Studio environment by this website.

A checked checklist records your own review, not automated project competence or a community verification.

Explain more

Attributes are named values attached to Instances. GetAttribute returns the authored value or nil. Use Properties to add a numeric Brightness attribute to each lamp.

Configuration is still data. Check its type and range before assigning it to a light property. A missing value gets a documented default; a negative value is not useful brightness.

This lab reads configuration once at attachment. Live configuration changes require a change signal and cleanup; do not imply this one-time read reacts automatically.

Reset starter

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Code

Studio source file

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local part = game:GetService("Workspace"):WaitForChild("LampA")
local light = Instance.new("PointLight")
light.Brightness = part:GetAttribute("Brightness")
light.Parent = part

Luau keyword highlighting · Ctrl/⌘ + Enter: Run · Esc: leave editorTab inserts indentation

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