DougDiggem/Assets/Scripts/CameraController.cs

using UnityEngine;

public class CameraController : MonoBehaviour
{
    private float moveSpeed = 50.0f;
    private float zoomSpeed = 20.0f;
    private bool isTracking = false; // don't track when parented
    private bool returningHome = false; // cam is on its way home
    private float baseCamSize = 5; // this is how "zoomed" the ortho cam is

    public Transform playerCamHome; // camera's home base
    public GameObject cameraObj;
    private Camera cameraComponent;

    private Vector3 currentCamPosition;
    private float desiredCamSize;

    public void SetCurrentPosition(Vector3 currentCamPosition, float desiredCamSize)
    {
        isTracking = true;
        returningHome = false;
        cameraObj.transform.parent = null;
        this.currentCamPosition = currentCamPosition;
        this.desiredCamSize = desiredCamSize;
    }

    public void ReturnCameraToHome()
    {
        isTracking = false;
        returningHome = true;

        currentCamPosition = playerCamHome.position;
        desiredCamSize = baseCamSize;
    }

    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        cameraComponent = cameraObj.GetComponent<Camera>();
        ReturnCameraToHome();
    }

    // Update is called once per frame
    void Update()
    {
        if (isTracking)
        {
            cameraObj.transform.position = Vector3.MoveTowards(cameraObj.transform.position, currentCamPosition, Time.deltaTime * moveSpeed);
            cameraComponent.orthographicSize = Mathf.MoveTowards(cameraComponent.orthographicSize, desiredCamSize, Time.deltaTime * zoomSpeed);
        }

        if (returningHome)
        {
            currentCamPosition = playerCamHome.position;

            cameraObj.transform.position = Vector3.MoveTowards(cameraObj.transform.position, currentCamPosition, Time.deltaTime * moveSpeed);
            cameraComponent.orthographicSize = Mathf.MoveTowards(cameraComponent.orthographicSize, desiredCamSize, Time.deltaTime * zoomSpeed);

            if (Vector3.Distance(cameraObj.transform.position, currentCamPosition) < 0.1f)
            {
                cameraObj.transform.parent = playerCamHome;
                cameraObj.transform.localPosition = Vector3.zero;
                cameraComponent.orthographicSize = baseCamSize;
                returningHome = false;
            }
        }
    }
}