3DTD/Assets/Scripts/Camera/CameraController.cs

using UnityEngine;
using Cinemachine;
using System.Collections;

public class CameraController : MonoBehaviour
{
    public static CameraController instance;

    [SerializeField] private GameObject cam;

    public float scrollSpeed = 2.5f;
    [Range(5f, 30f)] public float stopAfterTime;
    public AnimationCurve curve = new AnimationCurve(new Keyframe(0f, 0f, 1f, 1f), new Keyframe(1f, 1f, 1f, 1f));

    public Vector2 sens = new Vector2(300f, 3f);
    private Vector2 defaultMaxSpeed;

    private float timer;

    private void Awake()
    {
        if (instance == null)   
        instance = this;
    }

    private void Start()
    {
        if (instance != this)
            instance = this;

        defaultMaxSpeed *= 0;
    }

    private void Update()
    {
        //defaultMaxSpeed = new Vector2(cam.GetComponent<CinemachineFreeLook>().m_XAxis.m_MaxSpeed, cam.GetComponent<CinemachineFreeLook>().m_YAxis.m_MaxSpeed);

        if (Input.GetMouseButtonDown(1))
        {
            defaultMaxSpeed = sens;

            // Enable mouse input
            cam.GetComponent<CinemachineFreeLook>().m_XAxis.m_InputAxisName = "Mouse X";
            cam.GetComponent<CinemachineFreeLook>().m_YAxis.m_InputAxisName = "Mouse Y";
        }

        if (Input.GetMouseButtonUp(1))
        {
            timer = 0;

            // Disable mouse input
            cam.GetComponent<CinemachineFreeLook>().m_XAxis.m_InputAxisName = "";
            cam.GetComponent<CinemachineFreeLook>().m_YAxis.m_InputAxisName = "";
        }

        cam.GetComponent<CinemachineFreeLook>().m_XAxis.m_MaxSpeed = defaultMaxSpeed.x;
        cam.GetComponent<CinemachineFreeLook>().m_YAxis.m_MaxSpeed = defaultMaxSpeed.y;

        float scroll = Input.GetAxis("Mouse ScrollWheel");

        cam.GetComponent<CinemachineCameraOffset>().m_Offset.z += scroll * scrollSpeed;

        cam.GetComponent<CinemachineCameraOffset>().m_Offset.z = Mathf.Clamp(cam.GetComponent<CinemachineCameraOffset>().m_Offset.z, -20, 10);

        timer += Time.deltaTime;
        float evalTime = timer / stopAfterTime;
        if (!Input.GetMouseButton(1))
            defaultMaxSpeed = Vector2.LerpUnclamped(defaultMaxSpeed, Vector2.zero, curve.Evaluate(evalTime));
    }

    public void ShakeCamera(float intensity, float duration)
    {
        StartCoroutine(DoShake(intensity, duration));
    }

    private IEnumerator DoShake(float intensity, float duration)
    {
        Vector3 originalOffset = cam.GetComponent<CinemachineCameraOffset>().m_Offset;
        float elapsed = 0.0f;

        while (elapsed < duration)
        {
            float x = Random.Range(-1f, 1f) * intensity;
            float y = Random.Range(-1f, 1f) * intensity;

            cam.GetComponent<CinemachineCameraOffset>().m_Offset = new Vector3(x, y, originalOffset.z);

            elapsed += Time.deltaTime;
            yield return null;
        }

        cam.GetComponent<CinemachineCameraOffset>().m_Offset = originalOffset;
    }
}