查看物体A是否被相机B渲染

using UnityEngine;
using System.Collections;

public class Test : MonoBehaviour {

    public GameObject anObject ;
    private Camera cam ;
    private Plane[] planes ;

    void Start() {
        cam = Camera.main;
        planes = GeometryUtility.CalculateFrustumPlanes(cam);
    }

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

官网地址：http://docs.unity3d.com/Documentation/ScriptReference/GeometryUtility.TestPlanesAABB.html