Unity中实现相机的跟随

偏执的太偏执、 2021-09-18 13:08 512阅读 0赞

# 第一种方式（Vector3.SmoothDamp（））。 #

这种跟随方式在平滑时的效果感觉好一些。

![20190318185241609.gif][]

将FollowTarget.cs挂载在相机上，再指定一个相机想要跟随的物体，将其赋给共有属性targetTrans。

public class FollowTarget : MonoBehaviour
    {
        public Transform targetTrans;
        private float lerpTime = 0.5f;
        Vector3 velocity = Vector3.zero;
        private void Update()
        {
            if(targetTrans !=null)
            {
                Vector3 pos = Camera.main.WorldToViewportPoint(targetTrans.position);
                Vector3 offset = targetTrans.position - Camera.main.ViewportToWorldPoint(new Vector3(0.5f, 0.5f, pos.z));
                Vector3 destination = transform.position + offset;
    
                destination.x = 0;
                if (destination.y > transform.position.y)
                {
                    transform.position = Vector3.SmoothDamp(transform.position, destination, ref velocity, lerpTime);
                }
    
                //Vector3 cameraPos = transform.position;
    
                //if (destination.y > transform.position.y)
                //{
                //    cameraPos.y = Mathf.Lerp(transform.position.y, destination.y, lerpTime);
                //}
                //transform.position = cameraPos;
            }
        }
    }

# 第二种方式（Mathf.Lerp（）） #

这种方式的平滑效果感觉要生硬一些

public class FollowTarget : MonoBehaviour
    {
        public Transform targetTrans;
        private float lerpTime = 0.5f;
        Vector3 velocity = Vector3.zero;
        private void Update()
        {
            if(targetTrans !=null)
            {
                Vector3 pos = Camera.main.WorldToViewportPoint(targetTrans.position);
                Vector3 offset = targetTrans.position - Camera.main.ViewportToWorldPoint(new Vector3(0.5f, 0.5f, pos.z));
                Vector3 destination = transform.position + offset;
    
                //destination.x = 0;
                //if (destination.y > transform.position.y)
                //{
                //    transform.position = Vector3.SmoothDamp(transform.position, destination, ref velocity, lerpTime);
                //}
    
                Vector3 cameraPos = transform.position;
    
                if (destination.y > transform.position.y)
                {
                    cameraPos.y = Mathf.Lerp(transform.position.y, destination.y, lerpTime);
                }
                transform.position = cameraPos;
            }
        }
    }

![2019031818560243.gif][]

[20190318185241609.gif]: /images/20210725/142f29073c0b4ab581409500fb103f85.png
[2019031818560243.gif]: /images/20210725/6050a54e7d8f4cd9b71af574d002930a.png