How make the timer active when the object in the camera shot

#ASK help me guys.
how to make my timer active when the object in the camera shot?

here my script:


public float waitTime = 1f;
public int dollar;
public bool timerRunning;

void Start () {

}

void Update ()
{
if (timerRunning)
{
Oncom();
}
}
void Oncom()
{

dollar--;

if (dollar > waitTime) {

timerRunning = true;
}
else if ( dollar < 0)
{
dollar = 0;
}
}
}

 

It's a good idea to use the code tags when you're quoting code in your forum post.

For your problem, I would add the function https://docs.unity3d.com/ScriptReference/MonoBehaviour.OnWillRenderObject.html which gets called when the object is visible.

 

it cannot work

how to implement that


public int dollar;
public bool timerRunning;


public SpriteRenderer rend;


void Start () {

rend = GetComponent<SpriteRenderer>();
}

void Update ()
{
if (timerRunning)
{
OnWillRenderObject();
}
}

void OnWillRenderObject()
{
dollar--;

if (dollar < 1) {
dollar = 0;
timerRunning = true;
}
else if ( dollar < 0)
{
dollar = 0;
}
}
}

 

they time still running when out of the camera

 

You don't need to call 'OnWillRenderObject' yourself (from the Update function) - Unity will call it itself when the object is visible.