1.获取所有相机渲染的物体（包括子物体）。 

using System.Collections.Generic;
using UnityEngine;public class RenderedObjects : MonoBehaviour
{public Camera camera;private void Start(){if (camera == null){camera = Camera.main;}}private void Update(){Renderer[] renderers = GetRenderedObjects(camera);foreach (Renderer renderer in renderers){Debug.Log("Rendered object: " + renderer.gameObject.name);}}private Renderer[] GetRenderedObjects(Camera camera){Plane[] frustumPlanes = GeometryUtility.CalculateFrustumPlanes(camera);Renderer[] allRenderers = FindObjectsOfType<Renderer>();List<Renderer> renderedObjects = new List<Renderer>();foreach (Renderer renderer in allRenderers){if (GeometryUtility.TestPlanesAABB(frustumPlanes, renderer.bounds)){renderedObjects.Add(renderer);}}return renderedObjects.ToArray();}}

2.获取所有相机渲染的物体（不包括子物体）。 

using System.Collections.Generic;
using System.Linq;
using UnityEngine;public class RenderedObjects : MonoBehaviour
{public Camera camera;private void Start(){if (camera == null){camera = Camera.main;}}private void Update(){Transform[] parentObjects = GetParentObjects(camera);foreach (Transform parentObject in parentObjects){if (parentObject != null) Debug.Log("Parent object: " + parentObject.gameObject.name);}}private Transform[] GetParentObjects(Camera camera){Plane[] frustumPlanes = GeometryUtility.CalculateFrustumPlanes(camera);Renderer[] allRenderers = FindObjectsOfType<Renderer>();HashSet<Transform> parentObjects = new HashSet<Transform>();foreach (Renderer renderer in allRenderers){if (renderer.transform.childCount == 0 && GeometryUtility.TestPlanesAABB(frustumPlanes, renderer.bounds)){parentObjects.Add(renderer.transform);}else if (renderer.transform.childCount > 0){Transform parent = renderer.transform.parent;while (parent != null){if (!parentObjects.Contains(parent) && GeometryUtility.TestPlanesAABB(frustumPlanes, parent.GetComponent<Renderer>().bounds)){parentObjects.Add(parent);}parent = parent.parent;}}}return parentObjects.ToArray();}}