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Question by Siegeon · Dec 26, 2011 at 02:47 AM · movementgameobjectphysics

Strange movement behavior

I am working on a top down shooter, just recently I changed my code to recycle a group a prefabs rather then create and destroy them over and over again. The group of gameObjects is contained in List. When I made the change the bullets starting moving in erratic directions instead of strait. I have no idea why this little change would have caused this problem unless there was something jacked in the movement code. I would be great if someone could take a look at my code and see if anything pops out.

This is the code to instantiate or reuse game objects.

     void HandleBullets()
     {
         bulletsLeft -= 1;
         tempVector = Quaternion.AngleAxis(8f, Vector3.up) * inputRotation;
         tempVector = (transform.position + (tempVector.normalized * 0.8f));

         var bullet = Bullets.Find(b => !b.active);
         if (bullet != null)
         {
             bullet.transform.position = tempVector;
             bullet.transform.rotation = Quaternion.LookRotation(inputRotation);
             bullet.active = true;
         }
         else
         {
             GameObject objCreatedBullet = (GameObject)Instantiate(scriptVariable.objBullet, tempVector, Quaternion.LookRotation(inputRotation)); // create a bullet, and rotate it based on the vector inputRotation
             Physics.IgnoreCollision(objCreatedBullet.collider, collider);
             Bullets.Add(objCreatedBullet);
         }
     }

And this is the movement code for the bullet, very basic.

 void Update()
 {
     if (gameObject.active)
     {
         timeSpentAlive += Time.deltaTime;
         if (timeSpentAlive > 2) // if we have been travelling for more than one second remove the bullet
         {
             gameObject.active = false;
         }
         // move the bullet
         transform.Translate(0, 0, moveSpeed * Time.deltaTime);
         transform.position = new Vector3(transform.position.x, 0, transform.position.z); // because the bullet has a rigid body we don't want it moving off it's Y axis
     }
 }
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