让AI来告诉你什么叫幽灵堵车

使用环境参考

CocosCreator v3.7.2
ChatGPT

正文

什么是幽灵堵车

堵车，大家都不陌生！

堵车时我就思维发散，用 CocosCreator 模拟下堵车应该挺好玩，网上总说高速上最前面如果有个龟速的车，后面能堵车堵个两三公里。查了一下这叫“幽灵堵车”。问下 ChatGPT：

然后我就新建了个项目，从官方商城搞个车过来：

让 AI 帮你打代码

接下来就是让 AI 来敲代码的过程，要想让 AI 明白你的意思，你得尽可能详细的描述当前的环境以及你想要的东西！！

接下来是我们长长的长长的长长的对话：

参数的修改

代码终于成功跑起来了，然后速度过快，最大最小速度缩小了 50 倍左右，效果如下：

给出代码

import { _decorator, Component, Node, Prefab, instantiate, Vec3 } from "cc";const { ccclass, property } = _decorator;@ccclass("Main")export class Main extends Component {@property(Prefab)carPrefab: Prefab = null!;private carList: { speed: number; carNode: Node }[] = [];private time: number = 0;private interval: number = 3;start() {this.addCar();}update(dt: number) {this.time += dt;if (this.time > this.interval) {this.addCar();this.time = 0;}this.moveCars(dt);}private addCar() {const carNode = instantiate(this.carPrefab);carNode.parent = this.node;const car = { speed: 1, carNode: carNode };this.carList.push(car);}private moveCars(dt: number) {for (let i = 0; i < this.carList.length; i++) {const car = this.carList[i];const carPosition = car.carNode.position;// 如果不是第一辆车，则判断与前一辆车的距离是否大于安全距离if (i > 0) {const frontCar = this.carList[i - 1];const frontCarPosition = frontCar.carNode.position;const distance = frontCarPosition.x - carPosition.x;if (distance < 4) {car.speed = Math.max(0, frontCar.speed - 1);} else {car.speed = Math.min(1, frontCar.speed + 1);}}const newCarPosition = carPosition.add(new Vec3(car.speed * dt, 0, 0));car.carNode.setPosition(newCarPosition);}}}

让 AI 赋予小车加速度

一拍大腿，加速度给忘了，我说走的这么立正！！

接下来通过对话让 ai 给代码加上加速度，然后再写一个摄像机控制逻辑：

效果如图：

当车辆数量到达 40 左右时，就已经出现两段长时间的拥堵了，幽灵堵车-可视化 okk！！

当车辆 200+ 时，车辆会以 10 个左右为一组，组团摇摆，这还是大家反应力 MAX 理想情况！

最终代码：

// 挂载 root 空节点import { _decorator, Component, Node, Prefab, instantiate, Vec3 } from "cc";const { ccclass, property } = _decorator;@ccclass("Main")export class Main extends Component {@property(Prefab)carPrefab: Prefab = null!;private carList: { speed: number; carNode: Node }[] = [];private time: number = 0;private interval: number = 3;start() {this.addCar();}update(dt: number) {this.time += dt;if (this.time > this.interval) {this.addCar();this.time = 0;}this.moveCars(dt);}private addCar() {const carNode = instantiate(this.carPrefab);carNode.parent = this.node;const car = { speed: 5, carNode: carNode };this.carList.push(car);}private moveCars(dt: number) {const acceleration = 0.35; // 加速度const drag = 0.05; // 阻力系数for (let i = 0; i < this.carList.length; i++) {const car = this.carList[i];const carPosition = car.carNode.position;// 如果不是第一辆车，则判断与前一辆车的距离是否大于安全距离if (i > 0) {const frontCar = this.carList[i - 1];const frontCarPosition = frontCar.carNode.position;const distance = frontCarPosition.x - carPosition.x;if (distance < 5) {car.speed = Math.max(0, car.speed - acceleration - drag);} else {car.speed = Math.min(10, car.speed + acceleration - drag);}} else {// 第一辆车匀速低速行驶car.speed = Math.min(2, car.speed + acceleration - drag);}const newCarPosition = carPosition.add(new Vec3(car.speed * dt, 0, 0));car.carNode.setPosition(newCarPosition);}}}// 挂载 camera 摄像机节点import {_decorator,Component,Vec3,systemEvent,SystemEvent,EventKeyboard,KeyCode,} from "cc";const { ccclass, property } = _decorator;@ccclass("Camera")export class Camera extends Component {@property({ type: Number })moveSpeed: number = 5;private _isMovingLeft: boolean = false;private _isMovingRight: boolean = false;start() {systemEvent.on(SystemEvent.EventType.KEY_DOWN, this.onKeyDown, this);systemEvent.on(SystemEvent.EventType.KEY_UP, this.onKeyUp, this);}update(deltaTime: number) {let deltaMove = new Vec3();if (this._isMovingLeft) {deltaMove.x -= this.moveSpeed * deltaTime;}if (this._isMovingRight) {deltaMove.x += this.moveSpeed * deltaTime;}this.node.translate(deltaMove);}private onKeyDown(event: EventKeyboard) {switch (event.keyCode) {case KeyCode.KEY_A:this._isMovingLeft = true;break;case KeyCode.KEY_D:this._isMovingRight = true;break;}}private onKeyUp(event: EventKeyboard) {switch (event.keyCode) {case KeyCode.KEY_A:this._isMovingLeft = false;break;case KeyCode.KEY_D:this._isMovingRight = false;break;}}}

AI 总结

最后，让 AI 做个总结吧！

Emmmmm… 就喜欢它时而牛逼时而智障的样子！！

我是 kuokuo，个人网站：www.kuokuo666.com

2023！Day Day Up！