Abstract

In Unity 2020.3 LTS version, there are several ways to get a parent and child game object (GameObject) in Unity.

This section provides an example of how to use the "Transform.Find" function, and describes how to go back to the parent to retrieve another child object, as well as how to go back to the parent directory as a relative path, as in Linux and Windows file system.

Access to Children

You can use Transform.Find to get the child object.

When the script attached to Enemy GameObject in hierarchy as shown below, you can get Wolf's Transform using this.gameObject.transform.Find("Monster/Wolf").

The sample code is here.

public class EnemyBehaviour : MonoBehaviour{
    void Start() {
        GameObject wolf = this.gameObject.transform.Find("Monster/Wolf").gameObject;
    }
}

Access to parents and access to children of parents other than yourself

If you have the following structure, first get the parent object "Enemy", and then use transform.Find("Monster/Wolf") to get Wolf, using the parent object as a base point.

The sample code is here.

public class EnemyBehaviour : MonoBehaviour{
    void Start() {
        Transform enemyTransform = this.gameObject.transform.parent;
        this.wolf = enemyTransform.Find("Monster/Wolf").gameObject;
    }
}

This can also be written as a path in one shot with Transform.

public class EnemyBehaviour : MonoBehaviour{
    void Start() {
        this.wolf = this.gameObject.transform.Find("../Monster/Wolf").gameObject;
    }
}

This was a memo on how to use Transform. Thanks for reading!

Websites and references that were very helpful.

• (Official)docs.unity3d.com - Transform.Find

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