GeometryUtility.TestPlanesAABB

Description

Returns true if bounds are inside the plane array.

Will return true if the bounding box is inside the planes or intersects any of the planes.

The TestPlanesAABB function uses the Plane array to test whether a bounding box is in the frustum or not.
You can use this function with CalculateFrustrumPlanes to test whether a camera's view contains an object regardless of whether it is rendered or not.

See Also: GeometryUtility.CalculateFrustumPlanes.

// Detects manually if anObject is being seen by the main camera

var anObject : GameObject;
var anObjCollider: Collider;

private var cam : Camera;
private var planes : Plane[];

function Start() {
    cam = Camera.main;
    planes = GeometryUtility.CalculateFrustumPlanes(cam);
    anObjCollider = GetComponent.<Collider>();
}

function Update() {
    if(GeometryUtility.TestPlanesAABB(planes,anObjCollider.bounds))
        Debug.Log(anObject.name + " has been detected!");
    else
        Debug.Log("Nothing has been detected");
}

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    public GameObject anObject;
    public Collider anObjCollider;
    private Camera cam;
    private Plane[] planes;
    void Start() {
        cam = Camera.main;
        planes = GeometryUtility.CalculateFrustumPlanes(cam);
        anObjCollider = GetComponent<Collider>();
    }
    void Update() {
        if (GeometryUtility.TestPlanesAABB(planes, anObjCollider.bounds))
            Debug.Log(anObject.name + " has been detected!");
        else
            Debug.Log("Nothing has been detected");
    }
}