Destroy an object and replace with a prefab at original objects location?

Question

The green balls search out for white ones and "infect" them. The white balls are destroyed but they come back at the point of origin. I've tried to make a variable of the position of the white balls but I keep running into "Can't convert Transform to Vector3" errors.

public Rigidbody prefabInfection;
public Transform infectLocation;

void OnCollisionEnter(Collision colInfo)
{
    if (colInfo.collider.tag == "Infection")
    {
        Destroy(gameObject);
        Instantiate(prefabInfection);
    }
}

That's the code that's currently being used on collision.

I'm new to Unity also. Should I not destroy the white balls and instead somehow turn them into green balls? Is that possible?

Instantiation seemed like the only way. All I want to do is replace the white "human" balls to green "infection" ones.

"Should I not destroy the white balls and instead somehow turn them into green balls? Is that possible?" yes you should do that. either go the enable/disable approach of object pooling (youll need that if you plan replace the balls with actual models in the future) unity3d.com/de/learn/tutorials/topics/scripting/object-pooling or switch out their shared material docs.unity3d.com/ScriptReference/Renderer-sharedMaterials.html — yes

Dan Puzey Dan Puzey · Accepted Answer · 2018-05-25T17:17:14

The error you're seeing is probably because you're using the Transform object instead of its .position. Assuming your code is a component on the white ball gameObject, try this:

public Rigidbody prefabInfection;

void OnCollisionEnter(Collision colInfo)
{
    if (colInfo.collider.tag == "Infection")
    {
        Destroy(gameObject);
        Instantiate(prefabInfection, transform.position, transform.rotation);
    }
}

By passing your transform.position to the Instantiate function, the new object will be created in the same position as the one you're destroying. Hopefully this is the behaviour you intended!

Destroy an object and replace with a prefab at original objects location?

2 Answers