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As we talked about in lesson 7, the [code]scale[/code] variable has two sub-variables to it: [code]x[/code] and [code]y[/code].

This is because [code]scale[/code] is a [code]Vector2[/code], which stands for two-dimensional vector. A [code]Vector2[/code] represents 2D coordinates.
What are vectors?
A vector, in physics, is a quantity with a magnitude and a direction. For example, a force applied to some object, the velocity (speed and direction) of a character, and so on.

We often represent this quantity with an arrow.

In Godot, 2D vectors are a common value type named [code]Vector2[/code],

Unlike plain numbers, they store [i]two[/i] decimal numbers: one for the X coordinate and one for the Y coordinate.
So far, you've come across two variables in the course which are vectors. Which are they?
Both [code]scale[/code] and [code]position[/code] have [code]x[/code] and [code]y[/code] sub-variables, so Godot uses a [code]Vector2[/code] to store their values.
scale
position
health
speed
Vectors are great for games
Vectors are [i]essential[/i] in video games.

They allow you to represent a character's movement speed and direction, calculate the distance to a target, and more, with little code.

Take this turtle AI below. You've probably seen games where enemies move like this.

This is done with just seven lines of pure vector calculation code.

The code is a bit too difficult for now, so we'll spare you the details, but this turtle gives you a glimpse of what 2D vectors can do for you and your game projects.

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  1. Learn GDScript From Zero
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course/lesson-16-2d-vectors/lesson.tres:76 • course/lesson-16-2d-vectors/lesson.tres:77
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lesson-16-2d-vectors.pot, string 7