写一段unity无人驾驶代码

以下是一段简单的Unity无人驾驶代码：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class AutonomousVehicle : MonoBehaviour {

    public float speed = 10.0f; //车辆速度

    //车辆转向相关变量
    public float maxSteerAngle = 45.0f;
    public float turnSpeed = 5.0f;
    private float currentSteerAngle;

    //车辆传感器相关变量
    public float sensorLength = 5.0f;
    public Vector3 frontSensorPos = new Vector3(0.0f, 0.2f, 0.5f);
    public float frontSideSensorPos = 0.2f;
    public float frontSensorAngle = 30.0f;

    //车辆刹车相关变量
    public float maxBrakeTorque = 100.0f;
    private bool isBraking = false;

    private Rigidbody rb;

    void Start () {
        rb = GetComponent<Rigidbody>();
    }

    void FixedUpdate () {
        //获取传感器信息
        float leftSensor = getSensorInformation(-frontSensorAngle, -frontSideSensorPos, frontSensorPos);
        float rightSensor = getSensorInformation(frontSensorAngle, frontSideSensorPos, frontSensorPos);
        float middleSensor = getSensorInformation(0, 0, frontSensorPos);

        //计算转向角度
        float targetSteerAngle = maxSteerAngle * (leftSensor - rightSensor);

        //应用转向角度
        currentSteerAngle = Mathf.Lerp(currentSteerAngle, targetSteerAngle, Time.deltaTime * turnSpeed);
        transform.rotation = Quaternion.Euler(transform.rotation.eulerAngles.x, transform.rotation.eulerAngles.y + currentSteerAngle, transform.rotation.eulerAngles.z);

        //计算刹车力度
        if (Mathf.Abs(middleSensor) < 0.5f && (leftSensor > 0.5f || rightSensor > 0.5f)) {
            isBraking = true;
        } else {
            isBraking = false;
        }

        float brakeTorque = isBraking ? maxBrakeTorque : 0.0f;

        //应用车辆控制力
        rb.AddForce(transform.forward * speed);
        rb.AddTorque(transform.up * currentSteerAngle * rb.velocity.magnitude);

        //应用刹车力
        foreach (WheelCollider wheel in GetComponentsInChildren<WheelCollider>()) {
            wheel.brakeTorque = brakeTorque;
        }
    }

    float getSensorInformation(float angle, float sidePos, Vector3 sensorPos) {
        RaycastHit hit;
        Vector3 sensorStartPos = transform.position + transform.forward * sensorPos.z + transform.up * sensorPos.y;
        sensorStartPos += transform.right * sidePos;

        if (Physics.Raycast(sensorStartPos, Quaternion.AngleAxis(angle, transform.up) * transform.forward, out hit, sensorLength)) {
            return (sensorLength - hit.distance) / sensorLength;
        } else {
            return 0.0f;
        }
    }
}

这段代码是基于Unity的车辆控制系统，并使用了简单的传感器模拟无人驾驶车辆的行为。车辆将在场景中自动移动，并尝试避免障碍物。