want, new instantiated prefab to keep velocity of old, (now destroyed) instantiated prefab.

Question

on start, prefabA is instantiated
it starts moving, its velocity increases from zero to 5
on press of a button, prefabA is destroyed and prefabB is instantiated at same location as prefabA.

while prefabB keeps position and rotation of prefabA, prefabB doesnot keep velocity of prefabA, instead prefabB starts moving from zero velocity.

what is script for keeping the same velocity in

               Instantiate(PrefabB, prefabA.transform.position, prefabA.transform.rotation);

thank you.

Answer 1

Best Answer

Answer by lorenzofman2 · Feb 02, 2019 at 06:12 PM

You should cache the velocity of the rigidbody before you destroy it and then set this velocity to the new rigidbody

 public class Replace : MonoBehaviour
 {
     public Rigidbody prefabA;
     public Rigidbody prefabB;
 
     void Update()
     {
         if (Input.GetKeyDown(KeyCode.Space))
         {
             Vector3 oldObjectVelocity = prefabA.velocity;
             Rigidbody bInstance = Instantiate(prefabB, prefabA.transform.position, prefabA.transform.rotation);
             Destroy(prefabA.gameObject);
             bInstance.velocity = oldObjectVelocity;
         }
     }
 }

In my example I am using prefabA and prefabB as rigidbodies. If you don't want to treat them as rigidbodies, just cache their rigidbody in the start or inspector.

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want, new instantiated prefab to keep velocity of old, (now destroyed) instantiated prefab.

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