Moving camera FOV between a min and max value

Question

I need a code that move camera field of view (FOV) between a min and max value like 50-70 to zoom in and zoom out the camera view

For that i tried Mathf.MoveTowards function and it works well : GetComponent<Camera>().fieldOfView = Mathf.MoveTowards(camFOV,maxFOV,speed*Time.deltaTime)

Now i need this to run like that : 1)First wait 2 to 5 seconds 2)Zoom in (decrease fov to minFOV) 3)Wait 1 to 3 seconds randomly 4)Zoom out (increase fov to maxFOV) 5)REAPET THIS PROCESS UNTIL GAME RUNS

Please help me! Thanks.

Answer 1

This type of "do X, wait, do Y, wait" problem is a great use for Coroutines. In your specific case, it would look something like:

IEnumerator ChangeCameraFOV(Camera camera) {
  while (true) { // Or until some condition

    // Wait 2-5 seconds (random)
    yield return new WaitForSeconds(Random.Range(2f, 5f));

    // Zoom in
    while (camera.fieldOfView > minFOV) {
      camera.fieldOfView = Mathf.MoveTowards(camera.fieldOfView, minFOV, speed * Time.deltaTime);
      yield return null; // Wait for next frame
    }
    
    // Wait 1-3 seconds (random)
    yield return new WaitForSeconds(Random.Range(1f, 3f));


    // Zoom out
    while (camera.fieldOfView < maxFOV) {
      camera.fieldOfView = Mathf.MoveTowards(camera.fieldOfView, maxFOV, speed * Time.deltaTime);
      yield return null; // Wait for next frame
    }
  }
}

And then start the coroutine with StartCoroutine:

Corotuine cameraChangeCoroutine;
public void Start() {
  cameraChangeCoroutine = StartCoroutine(ChangeCameraFOV(GetComponent<Camera>()));
}

And stop it with StopCoroutine:

StopCoroutine(cameraChangeCoroutine);