Object Selection with large number of objects

[anon93477660]

I've got a scene with 10,000 GameObjects in it and I'm trying to implement Mouse Click object selection.

I've done this by doing the following:

• Attach a MonoBehaviour Component to the GameObject and override OnMouseDown().
• Add a Box Collider to the object to get mouse events.

I'm looking for a more optimal way to do this, something similar to this:

• When the user clicks the mouse, run a RayCast from the cursor location to see if it hits a GameObject. If it does, select that object.

Ideally, this logic only runs when the user clicks the mouse and I don't have to run OnMouseDown() on every one of my 10,000 GameObjects in every frame to determine a hit.

So the question I have is, which GameObject do I attach this script to so I only execute this logic when the user clicks the mouse? Or are there better ways to implement object selection?

[system]

You only need one instance of the script, and you can put it wherever you want. Probably on an empty GameObject, and name it SelectionManager or SelectionSystem (etc).

Here's a raycast selection snippet I've modified to your needs (updated to Javascript).

function Update ()
{
   if ( Input.GetMouseButtonDown(0) )
   {
      var hit : RaycastHit;
      var ray : Ray = Camera.main.ScreenPointToRay (Input.mousePosition);
      if (Physics.Raycast (ray, hit, 100.0))
      {
         Debug.Log(hit.collider.gameObject.name);
      }
   }
}