[原]unity3D 相机跟随

using UnityEngine;
using System.Collections;

public class CameraFollow : MonoBehaviour {
    
        public Transform target;
        private Vector3 wantedPosition;
    
        private float currentX;
        private float currentY;
        private float currentZ;
    
        private float xVelocity = 0.0F;
        private float yVelocity = 0.0F;
        private float zVelocity = 0.0f;
        private float distanceSnapTime = 0.1f;
    
    // Update is called once per frame
    void Update () {
    
            Vector3 targetPos = target.position;
            
            wantedPosition.x =  targetPos.x;
            
            wantedPosition.z = targetPos.z - 5f;//Vector3.forward*distance;   
            
            wantedPosition.y = targetPos.y -2f;// + heightAbovePlayer;
            
            currentX = Mathf.SmoothDamp(currentX, wantedPosition.x, ref xVelocity, distanceSnapTime);
            
            currentY = Mathf.SmoothDamp(currentY, wantedPosition.y, ref yVelocity, distanceSnapTime);
            
            currentZ = Mathf.SmoothDamp(currentZ, wantedPosition.z, ref zVelocity, 0.5f);
            
            transform.position = new Vector3(currentX,currentY,currentZ);
            transform.LookAt(transform.position + new Vector3(0f,0.95f,1));
    }
}