06 Unity3D人工智能AI-随机徘徊

using UnityEngine;using System.Collections;//pay attention that this function is quite related with frame ratepublic class SteeringForWander : Steering {    public float wanderRadius;    public float wanderDistance;    public float wanderJitter;    public bool isPlanar;    //public GameObject targetIndicator;    private Vector3 desiredVelocity;    private Vehicle m_vehicle;    private float maxSpeed;    private Vector3 circleTarget;    private Vector3 wanderTarget;    void Start () {        m_vehicle = GetComponent<Vehicle>();        maxSpeed = m_vehicle.maxSpeed;        isPlanar = m_vehicle.isPlanar;        circleTarget = new Vector3(wanderRadius*0.707f, 0, wanderRadius * 0.707f);    }    public override Vector3 Force()    {        Vector3 randomDisplacement = new Vector3((Random.value-0.5f)*2*wanderJitter, (Random.value-0.5f)*2*wanderJitter,(Random.value-0.5f)*2*wanderJitter);        if (isPlanar)            randomDisplacement.y = 0;        circleTarget += randomDisplacement;        circleTarget = wanderRadius * circleTarget.normalized;        wanderTarget = m_vehicle.velocity.normalized * wanderDistance + circleTarget + transform.position;        desiredVelocity = (wanderTarget - transform.position).normalized * maxSpeed;        return (desiredVelocity - m_vehicle.velocity);    }}