Stretch the Bridge

Part of the Roblox Game Scripting section of Coddy's Lua journey. Lesson 3 of 24.

Every part has a Size and a Position. Both are a Vector3: three numbers for the three directions of the world.

X: left and right
Y: up and down
Z: forward and back

Distances in Roblox are measured in studs. A player is about 5 studs tall.

local box = script.Parent
print(box.Size)
box.Size = Vector3.new(4, 10, 4)

The first print shows the size before the change, for example 2, 2, 2. The next line makes the box a tall tower: 4 wide, 10 high and 4 deep. A part grows equally in both directions from its center, so the tower now reaches 5 studs above and below its Position.

You read one number with .X, .Y or .Z: box.Size.Y is 10.

Challenge

Easy

There is a 24 stud gap between the gray spawn platform and the yellow goal, and the wooden bridge is only 4 studs long. There is no floor: miss the bridge and you fall.

The last line of the script sets the bridge's Size. Change its Z, the third number, so the bridge reaches both sides: at least 24. Keep it 6 wide and 1 thick.

Press Play and walk across, then Check.

Try it yourself

local bridge = script.Parent

-- The bridge is 6 wide, 1 thick and only 4 long.
print(bridge.Size)

-- Make it long enough to reach both sides
bridge.Size = Vector3.new(6, 1, 4)

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

All lessons in Roblox Game Scripting

1Scripts and Parts

Hello, Roblox Paint a PartStretch the BridgeBuild a Platform

4Game Mechanics

Speed Pad Jump Pad Click Me The Button Door Moving Platform Checkpoints Finish Line

2Loops and Functions

Row of Pillars Staircase Builder Tower Builder Coin Factory Blinking Light Vanishing Bridge

5Your First Game

Your First Obby

3Events and Players

Touch Pad Lava Floor Leaderstats Who Touched It?Coin Collector Coin Door

Practice on your own: Online Lua compiler