Adding a gameObject in an object in Unity3D - object

Question

The question might seem a little too weird but I want to add the object "Capsule" to my gameobject using script (see the photo below)
This is my code for adding components in my object:
object1 = (GameObject)Resources.Load (name) as GameObject;
myObject = Instantiate (object1);
myObject.transform.SetParent (parent.transform);
myObject.transform.position = new Vector3 (0, 0, 0);
myObject.transform.localScale = new Vector3 (70f, 70f, 70f);
myObject.AddComponent<BoxCollider> ();
myObject.AddComponent<CapsuleCollider> ();
myObject.AddComponent<MeshRenderer> ();
myObject.gameObject.SetActive (true);
What could be the possible solution for this? Thank you very much!

Answer 1

There seems to be a misunderstanding of what "Adding a GameObject" means so lets break this down. In Unity, a GameObject is a Transform and a collection of "Components". That Transform can be the "parent" or "child" of another Transform. GameObjects and their "Transform Heirarchy" are what's displayed in the "Heirarchy" Unity window. A single GameObject and its "Components" (things that implement MonoBehaviour) are what's displayed in the the "Inspector" Unity window.
By these terms, you cannot "Add a GameObject to another GameObject" however you can "Add a GameObject as a child of another GameObject" by parenting one Transform to another.
It seems like what you're trying to do here is add your "Capsule" as a child of each of your GameObjects. All you need to do in this case is, for each GameObject, instantiate a new instance of the "Capsule" (it could be setup as a prefab) and parent it to your GameObjects:
public class CapsuleAdder : MonoBehaviour {
private const string capsulePrefabName = "whatever"; // Prefab name goes here
void Awake() {
GameObject newCapsule = Instantiate(Resources.Load(capsulePrefabName) as GameObject) as GameObject;
newCapsule.transform.SetParent(transform); // Sets parent to this
}
}
As long as you properly set capsulePrefabName, any GameObject with this script attached will spawn a copy of your capsule prefab as a child.