I am trying to spawn and move a asteroid but the spawnner script doesnot access the script attached to the asteroid.

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Spawner Script

public class AsteroidSpawner : MonoBehaviour { [SerializeField] GameObject asteroidPrefab;

 Asteroidbody astbody;

 private void Awake()
 {
     astbody = asteroidPrefab.gameObject.GetComponent("Asteroidbody") as Asteroidbody;
 }

 void Start ()
 {
     
     Vector3 pos = new Vector3(0, 0, -Camera.main.transform.position.z);
     astbody.Initilise(Direction.Left);
     Instantiate<GameObject>(asteroidPrefab, pos, Quaternion.identity);

 }

}

Asteroid Body

public class Asteroidbody : MonoBehaviour { CircleCollider2D cc; float radius;

 void Start ()
 {
     cc = GetComponent<CircleCollider2D>();
     radius = cc.radius;
 }

 public void Initilise(Direction dir)
 {
     float angle = Random.Range(15, 45);
     if(dir == Direction.Down)
     {
         angle = angle + 180;
     }
     else
     {
         if(dir==Direction.Left)
         {
             angle = angle + 90;
         }

         else if(dir==Direction.Right)
         {
             angle = angle - 90;
             if(angle<0)
             {
                 angle = 360 + angle;
             }
         }
     }
     Vector2 direction = new Vector2(Mathf.Cos(angle * Mathf.Deg2Rad), Mathf.Sin(angle * Mathf.Deg2Rad));
     float magnitude = Random.Range(2, 4);
     GetComponent<Rigidbody2D>().AddForce(direction * magnitude, ForceMode2D.Impulse);
 }

 void OnBecameInvisible()
 {
     Vector2 position = transform.position;

     // check left, right, top, and bottom sides
     if (position.x + radius < ScreenUtils.ScreenLeft ||
         position.x - radius > ScreenUtils.ScreenRight)
     {
         position.x *= -1;
     }
     if (position.y - radius > ScreenUtils.ScreenTop ||
         position.y + radius < ScreenUtils.ScreenBottom)
     {
         position.y *= -1;
     }

     // move ship
     transform.position = position;
 }

}

Direction enum public enum Direction { Left, Right, Up, Down
}

Answer 1

Answer by Vega4Life · Dec 11, 2018 at 03:47 PM

You are trying to get the script off the asteroid prefab, you need to get it off the instance. Example:

         Vector3 pos = new Vector3(0, 0, -Camera.main.transform.position.z);
         GameObject go = Instantiate<GameObject>(asteroidPrefab, pos, Quaternion.identity);
         astbody = go.GetComponent<Asteroidbody>();    // This is what you need 
         astbody.Initilise(Direction.Left);

Remove the one from awake and add the bottom line above to your start

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Matt1000 · Dec 11, 2018 at 03:58 PM 0

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 //Like this actually
 Vector3 pos = new Vector3(0, 0, -Camera.main.transform.position.z);
 GameObject go = Instantiate<GameObject>(asteroidPrefab, pos, Quaternion.identity);
 astbody = go.GetComponent<Asteroidbody>();
 astbody.Initilise(Direction.Left);

Vega4Life Matt1000 · Dec 11, 2018 at 04:12 PM 0

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Yep. They should probably put it all in awake as well, but it gets them going. :)

I am trying to spawn and move a asteroid but the spawnner script doesnot access the script attached to the asteroid.

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