koobas.hobune.stream
How do I use PrefabUtility.InstantiatePrefab() ?
I'm extending the Transform editor with a button that clones game objects in the direction that I want.
For GOs that don't have a prefab connection, it simply uses Instantiate, and it works great, including setting the clone's transform parent as the same as the original GO.
If they have a prefab connection, I want the clone to preserve it, which is why I'm also using PrefabUtility.InstantiatePrefab. Unlike Instantiate, it doesn't take parameters to set the position.
https://docs.unity3d.com/ScriptReference/PrefabUtility.InstantiatePrefab.html
Here's the relevant piece of the code:
public void CloneGO(string dir)
{
int i = 0;
float originalPosX = obj.transform.position.x;
float originalPosY = obj.transform.position.y;
while (i < clones)
{
i++;
if (dir == "up")
{
newPos = new Vector2(originalPosX, originalPosY + (i * 0.4f));
}
// Other code here
bool isPrefab = PrefabUtility.IsPartOfPrefabInstance(obj);
// For Reddit: obj is Selection.activeGameObject;
if (isPrefab)
{
Debug.Log("Cloned a prefab");
cloneObj = PrefabUtility.InstantiatePrefab(obj) as GameObject;
cloneObj.transform.position = newPos;
}
else
{
Debug.Log("Cloned a regular GO");
cloneObj = Instantiate(obj, newPos, Quaternion.identity);
}
cloneObj.transform.parent = obj.transform.parent;
}
I'm getting a NullReferenceException when I try to clone a prefab. I also know that clone.Obj returns null in the line cloneObj = PrefabUtility.InstantiatePrefab(obj) as GameObject; but I don't understand why.
