RPG-FIGHT/Assets/CameraManager.cs

using System.Collections;
using System.Collections.Generic;
using Cinemachine;
using UnityEngine;

public class CameraManager : MonoBehaviour
{
    private CinemachineVirtualCamera activeCam;

    private static CameraManager instance;

    public static CameraManager getInstance()
    {
        return instance;
    }

    private void Start()
    {
        instance = this;
    }

    private void Update()
    {
        if (Input.GetAxis("Mouse ScrollWheel") != 0f)
        {
            CinemachineComponentBase componentBase = activeCam.GetCinemachineComponent(CinemachineCore.Stage.Body);
            if (componentBase is CinemachineFramingTransposer)
            {
                float m_CameraDistance = (componentBase as CinemachineFramingTransposer).m_CameraDistance;
                if (m_CameraDistance <= 1 && Input.GetAxis("Mouse ScrollWheel") > 0)
                {
                    m_CameraDistance = 1f;
                }
                else
                {
                    m_CameraDistance -= Input.GetAxis("Mouse ScrollWheel") * 10;
                }
                (componentBase as CinemachineFramingTransposer).m_CameraDistance = m_CameraDistance;
            }
        }
    }

    private void Awake()
    {
        activeCam = GetComponentInChildren<CinemachineVirtualCamera>();
    }

    public void focusOnGameObject(GameObject gameObject)
    {
        activeCam.Follow = gameObject.transform;
    }
}