U3D 小球跟随鼠标在地上移动（二）

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using UnityEngine;using System.Collections;public class moveController : MonoBehaviour {public int moveSpeed;Vector3 targetPoint;// Use this for initializationvoid Awake () {targetPoint =  transform.position;}// Update is called once per framevoid Update () {getTargetPoint ();}void FixedUpdate(){                       //单位华，取得单位向量Vector3 targetForce = (targetPoint - transform.position).normalized;//利用刚体方法实现小球到滚动                rigidbody.AddForce (targetForce*moveSpeed);}void getTargetPoint(){Ray ray = Camera.main.ScreenPointToRay (Input.mousePosition);RaycastHit hitInfo = new RaycastHit();if(Input.GetMouseButtonDown(0)){if(Physics.Raycast(ray,out hitInfo) ){if(hitInfo.collider.gameObject.name == "Land"){targetPoint = hitInfo.point;Debug.Log("targetPoint:"+targetPoint);}}}}}

利用刚体到方法实现小球的移动，会因为惯性等因素，使小球控制精度降低

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