title: How to Detect TriggerEnter without OnTriggerEnter Function Unity
body: <p>I have a empty game object attached with a obstacles script. This script contain List of all the instantiate object references. I want to check whether the instantiate objects enter into trigger or not using this single script.</p>
  
  <p>Since unity execute <code>OnTriggerFunction()</code> if a monobehavior script is attache to it. I don't want to add the script in all instantiate object to trigger check.</p>
  
  <p>Here is my sample code</p>
  
  <pre><code>public List&lt;AsteroidStructure&gt; asteroidStructure = new List&lt;AsteroidStructure&gt; ();
  
  public void AsteroidCollision (List&lt;AsteroidStructure&gt; asteroidStructure){
  
  
  }
  </code></pre>
  
  <p>This script is attached to single empty game object and list variable contains all the references of instantiate object. I want to check the trigger of all game object in Asteroid collision function. I am calling this function in every fixed update.</p>