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Recap: Orbiting Moon

Part of the Unity Scripting Basics section of Coddy's Unity journey. Lesson 36 of 85.

This recap puts the chapter together: a child that follows its parent with no code, a turn every frame, and a scale that grows toward a limit.

challenge icon

Challenge

Medium

Write the planet's script; the moon, its child, follows by itself.

  1. In Update(), spin the planet around y at spin degrees a second.
  2. While Space is held, grow a float size field from 1 toward 2 at grow a second with Mathf.MoveTowards.
  3. Set transform.localScale = Vector3.one * size;.

Press Play and hold Space: the planet grows and the moon swings wider. Then Check.

Try it yourself

using UnityEngine;

public class Planet : MonoBehaviour
{
    public float spin = 40f;
    public float grow = 0.5f;

    void Update()
    {
    }
}
quiz iconTest yourself

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

All lessons in Unity Scripting Basics

1C# Basics in Unity

Hello, UnityVariablesDecimals Need an fText in the ConsoleVariables That RememberIf and ElseCompare NumbersRecap: Coin Collector

4Input

Pressed, Held, ReleasedAxesNamed ButtonsMouse ButtonsRecap: Charge Jump

7Loops and Methods

Repeat with forLoops Inside LoopsWrite a MethodMethods That AnswerArraysRecap: Staircase

10Finding Things

Find by NameTagsFind by TypeReferences Beat FindUnity's NullRecap: Nearest Coin

13Project: Dodge the Blocks

The RunnerBlocks from the SkyProject lessonLet Them FallProject lessonClean UpProject lessonHit!Project lessonSurvive and ScoreProject lesson

2Make It Move

Place the CubeMove Every FrameTurn Every SecondSteer with the KeysRecap: Drive the Cube

5Vectors

Adding VectorsDirectionsLocal and World SpaceDiagonal SpeedDistance Between ThingsVector3 Is a StructRecap: Drone Pilot

8GameObjects and Components

References in the InspectorGet a ComponentMissing ComponentsAdd a ComponentRequireComponentShow and HideRecap: Light Switch

11Prefabs and Spawning

Prefabs and InstantiateSpawn on a TimerSpawn in a GridLists of ObjectsTake Back the NewestDestroyRandom SpawnsRecap: Fireworks

14Final Challenges

Coin MagnetCrossing the RoadRoad TrafficTower BuilderLand or Miss

3The Inspector

Inspector FieldsSerializeFieldFloats and MathfInspector AttributesRecap: Elevator

6Transforms and Hierarchy

Parents and ChildrenHoist the FlagScaleLook At ThingsMove Toward a PointRecap: Orbiting Moon

9Project: Catch the Star

The CatcherA Falling StarProject lessonCatch ItProject lessonStar After StarProject lessonFaster and FasterProject lessonThree LivesProject lesson

12The Script Lifecycle

Awake and StartUpdate and LateUpdateOnEnable and OnDisableThe Lifecycle OrderRecap: Lifecycle Logger

Practice on your own: Unity playground