void RemoveRenderEventCall()
 {
     foreach (Camera cam in Camera.allCameras)
     {
         NsRenderManager_B nsr = cam.GetComponent <NsRenderManager_B>();
         if (nsr != null)
         {
             nsr.RemoveRenderEventCall(this);
         }
     }
 }
 void AddRenderEventCall()
 {
     foreach (Camera cam in Camera.allCameras)
     {
         NsRenderManager_B nsr = cam.GetComponent <NsRenderManager_B>();
         if (nsr == null)
         {
             nsr = cam.gameObject.AddComponent <NsRenderManager_B>();
         }
         nsr.AddRenderEventCall(this);
     }
 }