Unity鼠標移動平滑旋轉相機

      物體旋轉可以選擇歐拉角或者四元素進行,我這裏爲了旋轉平滑用了四元素的Quaternion.Slerp方法,但是如果上下左右旋轉同時作用在相機上,旋轉的時候會出現傾斜.爲了解決這個問題我給相機添加一個父物體,父物體控制水平旋轉,相機控制垂直旋轉.

      在場景中創建一個相機父物體,相機的位置和旋轉默認歸零.完整代碼如下:

public float XSensitivity = 2f;
    public float YSensitivity = 2f;
    //是否平滑
    public bool smooth;
    //平滑參數
    public float smoothTime = 5f;

    //相機父物體
    private Quaternion targetRot;
    //相機
    private Quaternion cameraRot;

    private void Start()
    {
        targetRot = transform.parent.localRotation;
        cameraRot = transform.localRotation;
    }

    private void Update()
    {
        //按下右鍵旋轉
        if (!Input.GetMouseButton(1)) return;
        LookRotation();
    }

    public void LookRotation()
    {
        float yRot = Input.GetAxis("Mouse X") * XSensitivity;
        float xRot = Input.GetAxis("Mouse Y") * YSensitivity;

        targetRot *= Quaternion.Euler(0f, yRot, 0f);
        cameraRot *= Quaternion.Euler(-xRot, 0f, 0f);

        if (smooth)
        {
            transform.parent.localRotation = Quaternion.Slerp(transform.parent.localRotation, targetRot, smoothTime * Time.deltaTime);
            transform.localRotation = Quaternion.Slerp(transform.localRotation, cameraRot, smoothTime * Time.deltaTime);
        }
        else
        {
            transform.parent.localRotation = targetRot;
            transform.localRotation = cameraRot;
        }
    }

把腳本拖拽到相機上即可.