判断物体是否在视角内（根据摄像机判断）

public bool isRendering = false;

private float lastTime = 0.0F;

private float curtTime = 0.0F;

void Update()
{
isRendering=curtTime!=lastTime?true:false;
lastTime=curtTime;
if(isRendering){
Debug.Log("在视角之内");
}
}

void OnWillRenderObject()
{
curtTime=Time.time;
}