To use these two functions today, you create a script yourself:
public class Test:monobehaviour
{
void onbecamevisible ()
{
Debug.Log ("onbecamevisible");
}
void Onbecameinvisible ()
{
Debug.Log ("onbecameinvisible");
}
Create a random cube in the scene (within the camera range), hang the script on the camera, and since it's not reflected, the camera is clearly out of the game window and there are cube objects.
And then continue to try, and bind the script to the cube, and the result is workable,
So the script that needs to talk about this function is tied to an object to be executed.
The individual understands the meaning of these two functions, when the material on the cube is rendered to call Onbecamevisible, the other is called onbecameinvisible, when the two functions can be called when the corresponding calculation work.
Official connection