How to culling in postprocess?

Hi,

I want to use "Graphics.DrawMeshNow" to draw some object in my postprocess:

Code (CSharp):

1. public class PP_Light_Point : MonoBehaviour
2. {
3. ......
4. void OnRenderImage(RenderTexture sourceTexture, RenderTexture destTexture)
5. {
6.         Camera curCamera = GetComponent<Camera> ();
7.         UnityEngine.Object[] _Lights = FindObjectsOfType (typeof(Light));
8.         foreach (UnityEngine.Object obj in _Lights)
9.         {
10.               Light lit = obj as Light;
11.  
12.               // There need to cull the light is need to DrawMeshNow.
13.  
14.               _LightPointMatrial.SetPass(0);
15.               Matrix4x4 kWorldMat = lit.transform.localToWorldMatrix;
16.               Graphics.DrawMeshNow(lp.mesh, kWorldMat);
17.         }
18. }
19. ......
20. }

Some lights are out of camera, they need not to draw. So I want to cull the light.
How to do it? Thank you.

 

Have a peek: http://docs.unity3d.com/ScriptReference/GeometryUtility.TestPlanesAABB.html

 

It's ok,
Thank you very much.