Unity 카메라 기능들 정리

1. MouseLookAt | 마우스를 이용한 부드러운 바라보기

2. Shake | 스페이스바를 이용하여 카메라 떨림 구현

3. 계속 추가예정

using System.Collections;
using UnityEngine;

public class CameraTest : MonoBehaviour
{
    [SerializeField] Transform target;
    [SerializeField] float mouseXSpeed = 10f;
    [SerializeField] float mouseYSpeed = 10f;

    //카메라 pivot값
    [SerializeField] Vector3 cameraPivot = new Vector3(0.2f, 1.5f, -2f);

    // 마우스 회전값
    float xRotation = 0f;
    float yRotation = 0f;

    [Header("카메라 회전 제한값")]
    [SerializeField] float minXRotation = -45f;
    [SerializeField] float maxXRotation = 45f;
    [SerializeField] float minYRotation = -30f;
    [SerializeField] float maxYRotation = 45f;

    [Header("카메라 회전 부드러움")]
    [SerializeField] float smoothTime = 0.1f;
    float xRotationVelocity = 0f;
    float yRotationVelocity = 0f;

    [Header("카메라 흔들림")]
    [SerializeField] float shakeTime = 1f;
    [SerializeField] float shakeMagnitude = 0.1f;
    void Start()
    {
        Cursor.lockState = CursorLockMode.Locked;
        ResetCameraPosition();
        ResetMouseRotation();
    }

    void Update()
    {
        ResetCameraPosition();
        MouseLookAt();
        if (Input.GetKeyDown(KeyCode.Space))
        {
            CameraShake();
        }
    }

    private void ResetMouseRotation()
    {
        xRotation = 0f;
        yRotation = 0f;
    }

    private void MouseLookAt()
    {
        float mouseX = Input.GetAxisRaw("Mouse X") * Time.deltaTime * mouseXSpeed;
        float mouseY = Input.GetAxisRaw("Mouse Y") * Time.deltaTime * mouseYSpeed;

        xRotation -= mouseY;
        yRotation += mouseX;

        xRotation = Mathf.Clamp(xRotation, minXRotation, maxXRotation);
        yRotation = Mathf.Clamp(yRotation, minYRotation, maxYRotation);

        float smoothX = Mathf.SmoothDampAngle(transform.eulerAngles.x, xRotation, ref xRotationVelocity, smoothTime);
        float smoothY = Mathf.SmoothDampAngle(transform.eulerAngles.y, yRotation, ref yRotationVelocity, smoothTime);

        Vector3 dir = new Vector3(smoothX, smoothY, 0);

        transform.rotation = Quaternion.Euler(dir);
    }

    private void CameraShake()
    {
        StopCoroutine("Shacke");
        ResetCameraPosition();
        StartCoroutine(Shake(shakeTime, shakeMagnitude));
    }

    private void ResetCameraPosition()
    {
        transform.position = target.position + cameraPivot;
    }

    IEnumerator Shake(float time, float magnitude)
    {
        float elapsedTime = 0f;

        while (elapsedTime < time)
        {
            float x = Random.Range(-1f, 1f) * magnitude; // 좌우 
            float y = Random.Range(-1f, 1f) * magnitude; // 위아래
            float z = Random.Range(-1f, 1f) * magnitude; // 앞뒤

            Vector3 offset = Random.insideUnitCircle * magnitude; // x, y 값을 동시에 랜덤하게 설정

            transform.position = target.position + cameraPivot + new Vector3(0, y, 0);

            elapsedTime += Time.deltaTime;

            yield return null;
        }

        ResetCameraPosition();
    }


}