Stretch the Bridge

Part of the Roblox Game Scripting section of Coddy's Lua journey. Lesson 3 of 25.

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 bridge = script.Parent
print(bridge.Size)
bridge.Size = Vector3.new(8, 1, 10)

The print shows the size before the change, for example 4, 1, 2. The next line makes the bridge 8 wide, 1 thick and 10 long. A part grows equally in both directions from its center, so the bridge now reaches 5 studs forward and 5 studs back from its Position.

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

Challenge

Easy

Stretch the wooden bridge across the 24 stud gap to the yellow goal.

Find the last line: bridge.Size = Vector3.new(6, 1, 4).
Change the third number, Z, to 28. Keep it 6 wide and 1 thick.

Press Play: the bridge reaches the goal and you can 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)

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 Respawn Coin Door

Practice on your own: Online Lua compiler