Handeling Collision between clones and objects with same name/tag

Question

Hey Guys,

Not so new coder, but new to Unity - been searching for someone with a similar issue and no luck. Was hoping someone here could help me out.

I've got a prefab with a tag called "Asteroid", and it has a mesh collider - it works fine with objects with different tags, but when I try to handle collisions of an asteroid with itself (instantiated clones and other smaller asteroids with the same tag).

Here is basically the code I use just to get a "hit" print it is a componenet on the asteroid object.

 function OnTriggerEnter(other: Collider){
 if(other.tag.Equals("Asteroid")){
 print("hit");
 }
 }

Thanks for taking the time, Sam.

Answer 1

Answer by Muuskii · Jul 22, 2013 at 06:45 PM

If two objects of the same type are not registering collisions with eachother first thing I would check is if their Collision layers are setup to interact with themselves.

I'm getting the feeling you have a custom movement script? Or are you using rigidbody physics?

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Shmulzious · Jul 22, 2013 at 06:54 PM 0

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Actually, didn't even remember the collision layers thing, so thanks for that I'll keep it in $$anonymous$$d for the future :)

Though I haven't implemented this, so all the objects are on the same layer.

I am using AddForce(), and some other scripts activated through different objects. Here they are (I know some are bad practice and I should make more variables public ect. Though this is a learning project I am intending to share so sorry for the mess :))

 //This one is from my main camera script
 void FixedUpdate()
     {
         //Apply force to Asteroids
         GameObject[] currentAsteroids = new GameObject[GameObject.FindGameObjectsWithTag("Asteroid").Length];
         currentAsteroids = GameObject.FindGameObjectsWithTag("Asteroid");
         if (currentAsteroids.Length > 0){
             for(int i = 0; i < currentAsteroids.Length; i++){
                 if(currentAsteroids[i].name.Equals("Asteroid(Clone)")){
                 currentAsteroids[i].rigidbody.AddForce(Random.Range (-20,20),Random.Range (-20,20), 25);
                 }
                 if(currentAsteroids[i].name.Equals("midAsteriodBit(Clone)")){
                 currentAsteroids[i].rigidbody.AddForce(Random.insideUnitCircle * 100);
                 }
                 if(currentAsteroids[i].name.Equals("smallAsteroidBit(Clone)")){
                 currentAsteroids[i].rigidbody.AddForce(Random.insideUnitCircle * 200);
                 }
             }
         }
 }
 
 //This one is from my player child "$$anonymous$$agnet" script
 
 var magneticStrength = 50;
 
 function OnTriggerStay(other : Collider)
     {
         var direction = (transform.position-other.transform.position);
 
         if(direction.sqr$$anonymous$$agnitude <= magneticStrength*magneticStrength) // if we're inside the range of the magnetic
         {
             other.rigidbody.AddForce(direction.normalized * magneticStrength);
         }
     }
 
 //This one is from my Asteroid script
 
     //Asteroids are stopped at the borders of the screen and pushed away from them with rigidbody.Addforce
     //Top Border
     if(transform.position.y >= 28.5){
         transform.position = new Vector3(transform.position.x,28.5f,transform.position.z);
         rigidbody.AddForce(0,-50,25);
     }
     //Bottom border
     if(transform.position.y <= -28.5){
         transform.position = new Vector3(transform.position.x,-28.5f,transform.position.z);
         rigidbody.AddForce(0,50,25);
     }
     //Left border
     if(transform.position.x >= 38.5){
         transform.position = new Vector3(38.5f,transform.position.y,transform.position.z);
         rigidbody.AddForce(-50,0,25);
     }
     //Right border
     if(transform.position.x <= -38.5){
         transform.position = new Vector3(-38.5f,transform.position.y,transform.position.z);
         rigidbody.AddForce(50,0,25);
     }
     
     transform.Rotate(2,2,2);

Handeling Collision between clones and objects with same name/tag

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