Scene hierarchy window in Unity - Mini Project: Build & Apply

Scene Hierarchy Window in Unity

📖 Scenario: You are creating a simple Unity scene with a few game objects arranged in a hierarchy. This helps organize objects like characters, lights, and cameras in the scene.

🎯 Goal: Build a Unity script that creates a parent game object called ParentObject and two child objects called Child1 and Child2. Then, print the names of all children under ParentObject in the console.

📋 What You'll Learn

Create a parent GameObject named ParentObject

Create two child GameObjects named Child1 and Child2

Set Child1 and Child2 as children of ParentObject

Use a for loop to print the names of all children of ParentObject

💡 Why This Matters

🌍 Real World

Organizing objects in a scene hierarchy is essential for managing complex Unity scenes, making it easier to find and control objects.

💼 Career

Understanding scene hierarchy and scripting object relationships is a fundamental skill for Unity developers working on games and interactive applications.

1

Create Parent GameObject

Create a GameObject called ParentObject using new GameObject("ParentObject") and store it in a variable named parent.

Unity

using UnityEngine;

public class SceneHierarchy : MonoBehaviour
{
    void Start()
    {
        // Create ParentObject GameObject
        
    }
}

Need a hint?

Use new GameObject("ParentObject") to create the parent object and assign it to parent.

2

Create Child GameObjects and Set Parent

Create two GameObjects called Child1 and Child2 using new GameObject. Set their transform.parent to parent.transform.

Unity

using UnityEngine;

public class SceneHierarchy : MonoBehaviour
{
    void Start()
    {
        GameObject parent = new GameObject("ParentObject");
        // Create Child1 and Child2 GameObjects
        // Set their parent to parent.transform
    }
}

Need a hint?

Create child objects and assign their transform.parent to the parent's transform.

3

Loop Through Children

Use a for loop with an integer i from 0 to parent.transform.childCount - 1 to access each child using parent.transform.GetChild(i). Inside the loop, get the child's name using child.name.

Unity

using UnityEngine;

public class SceneHierarchy : MonoBehaviour
{
    void Start()
    {
        GameObject parent = new GameObject("ParentObject");
        GameObject child1 = new GameObject("Child1");
        GameObject child2 = new GameObject("Child2");
        child1.transform.parent = parent.transform;
        child2.transform.parent = parent.transform;
        // Loop through children of parent
    }
}

Need a hint?

Use a for loop and GetChild(i) to get each child transform and its name.

4

Print Children Names

Inside the for loop, use Debug.Log(childName) to print each child's name to the Unity console.

Unity

using UnityEngine;

public class SceneHierarchy : MonoBehaviour
{
    void Start()
    {
        GameObject parent = new GameObject("ParentObject");
        GameObject child1 = new GameObject("Child1");
        GameObject child2 = new GameObject("Child2");
        child1.transform.parent = parent.transform;
        child2.transform.parent = parent.transform;

        for (int i = 0; i < parent.transform.childCount; i++)
        {
            Transform child = parent.transform.GetChild(i);
            string childName = child.name;
            // Print childName to console
        }
    }
}

Need a hint?

Use Debug.Log(childName) inside the loop to show each child's name in the console.