贪吃蛇游戏源码

//定义食物类food
class Food {
    //定义一个属性表示食物对应的元素
    element: HTMLElement;
    constructor() {
        //获取页面中的food元素并赋值给element
        this.element = document.getElementById('food');
    }
    //定义一个获取食物X轴坐标的方法
    get X() {
        return this.element.offsetLeft;
    }
    //定义一个获取食物Y轴坐标的方法
    get Y() {
        return this.element.offsetTop;
    }
    //修改食物位置的方法
    change() {
        // left:0-290，top:0-290 需要被10整除，蛇移动一次就是一格(10)。
        //
        let left = Math.round(Math.random() * 29) * 10;
        let top = Math.round(Math.random() * 29) * 10;
        this.element.style.left = `${left}px`
        this.element.style.top = `${top}px`
    }
}
export default Food

//游戏控制器，控制其他所有类
import Snake from "./Snake";
import Food from "./Food";
import ScorePanel from "./ScorePanel";

class GameControl {
    //定义三个属性
    //蛇
    snake: Snake;
    food: Food;
    scorePanel: ScorePanel;
    //创建一个属性存储蛇的移动放心
    direction: string = '';
    //创建一个属性记录游戏是否结束
    isLive: boolean = true;
    constructor() {
        this.snake = new Snake();
        this.food = new Food();
        this.scorePanel = new ScorePanel(10,2);
        this.init()
    }
    //游戏初始化方法调用后游戏就开始
    init() {
        //绑定键盘按下的事件
        document.addEventListener('keydown', this.keydowHandler.bind(this))
        this.run()
    }
    //创建一个键盘按下的响应函数
    keydowHandler(e) {
        console.log(e.key);
        //需要检验key的值是否合法(用户是否按了正确的案件)
        this.direction = e.key;

    }
    //创建一个控制蛇移动的方法
    run() {
        /* 
          根据方向（this.direction）来改变蛇的偏移量
          向上TOP减少
          向下TOP增加
          向左left减少
          向右left增加
        */
        //获取蛇现在的坐标
        let x = this.snake.X;
        let y = this.snake.Y;
        //计算坐标的变化
        switch (this.direction) {
            case 'ArrowUp':
            case 'Up':
                //向上移动TOP减小
                y -= 10;
                break;
            case 'ArrowDown':
            case 'Down':
                //向下移动TOP增加
                y += 10;
                break;
            case 'ArrowLeft':
            case 'Left':
                //向左移动x减小
                x -= 10;
                break;
            case 'ArrowRight':
            case 'Right':
                //向右移动x增加
                x += 10;
                break;
        }
         //检查蛇是否吃到了食物
          this.checkEat(x,y)
        //修改蛇的位置
        try {
            this.snake.X = x;
            this.snake.Y = y;
        } catch (e) {
            //进入catch，说明除了异常，游戏结束，弹出一个信息提示
            alert(e.message + 'GAME OVER !');//弹出提示
            this.isLive = false;//结束游戏

        }

        //开启一个定时器，让蛇能够自己董
        this.isLive && setTimeout(this.run.bind(this), 300 - (this.scorePanel.level - 1) * 30);
    }
    //定义一个方法，来检查蛇是否吃到食物
    checkEat(X: Number, Y: Number) {
        //检查蛇是否吃到了食物
        if (X === this.food.X && Y === this.food.Y) {
            console.log('吃到食物了');
            this.food.change();//改变食物的位置
            this.scorePanel.addScore();//增加分数
            this.snake.addBody();//增加蛇的长度

        }
    }
}
export default GameControl

//定义记分牌类
class ScorePanel {
    maxLevel:number//限制最大等级
    upScore:number//多少分升级 
    //score和level用来记录分数和等级
    private _score: number = 0;
    private _level: number = 1;
    //分数和等级所在元素
    scoreEle: HTMLElement;
    levelEle: HTMLElement;
    constructor(maxlevel:number = 10,upScore:number=10) {
        this.maxLevel = maxlevel;
        this.upScore = upScore
        this.scoreEle = document.getElementsByClassName('score')[0] as HTMLAreaElement;
        this.levelEle = document.getElementsByClassName('level')[0] as HTMLAreaElement;
    }
    get score() {
        return this._score
    }
    get level() {
        return this._level
    }
    //设置一个加分的方法
    addScore(){
       let score = ++this._score;
        this.scoreEle.innerHTML = `${score}`
        //判断分数是多少，来判断是否升级
        if(this._score %this.upScore ===0){
            this.levelUp()
        }
    }
    //提升等级的方法
    levelUp(){
        if(this._level <this.maxLevel){
            this.levelEle.innerHTML  = `${++this._level}`
        }
    }
}
export default ScorePanel

class Snake {
    //表示蛇头的元素
    head: HTMLElement;
    //表示身体的元素
    bodies: HTMLCollection;
    //获取蛇的容器
    element: HTMLElement

    constructor() {
        this.head = document.querySelector('#snake > div')
        this.bodies = document.getElementById('snake').getElementsByTagName('div')
        this.element = document.getElementById('snake');
    }
    //获取蛇的坐标(蛇头坐标)
    get X() {
        return this.head.offsetLeft;
    }
    get Y() {
        return this.head.offsetTop;
    }
    set X(value: number) {
        if (this.X == value) {
            return;
        }
        //X的值的合法区间0-290
        if (value < 0 || value > 290) {
            //蛇撞墙的处理
            throw new Error('蛇撞墙了')
        }
        //修改X时，是在修改水平坐标，蛇在左右移动，蛇向左移动时,不能向右移动,反之亦然
        if (this.bodies[1]) {
            //判断是否有第二截身体
            if (value === (this.bodies[1] as HTMLElement).offsetLeft) {
                //判断即将改变的蛇头的坐标是否和第二截身体的坐标相同，相同就发生了掉头
                //console.log('发生了掉头');
                //如果发生了掉头，让蛇向反方向继续移动
                if(value>this.X){
                    //如果value大于X,则说明蛇在向右走
                    value = this.X-10
                }else{
                    value = this.X+10
                }               
            }
        }

        //移动身体
        this.moveBody()

        this.head.style.left = `${value}px`;
        try {
            this.checkHeadBody()
        } catch (error) {
            alert(error.message+'GAME OVER !')
        }

    }
    set Y(value: number) {
        if (this.Y == value) {
            return;
        }
        if (value < 0 || value > 290) {
            //蛇撞墙的处理
            throw new Error('蛇撞墙了')
        }
         //修改Y时，是在修改蛇的垂直坐标，蛇在上下移动，蛇向上移动时,不能向下移动,反之亦然
         if (this.bodies[1]) {
            //判断是否有第二截身体
            if (value === (this.bodies[1] as HTMLElement).offsetTop) {
                //判断即将改变的蛇头的坐标是否和第二截身体的坐标相同，相同就发生了掉头
                //console.log('发生了掉头');
                //如果发生了掉头，让蛇向反方向继续移动
                if(value>this.Y){
                    //如果value大于Y,则说明蛇在向上走
                    value = this.Y-10
                }else{
                    value = this.Y+10
                }               
            }
        }
        //移动身体
        this.moveBody()
        this.head.style.top = `${value}px`;
        try {
            this.checkHeadBody()
        } catch (error) {
            alert(error.message+'GAME OVER !')
        }
    }
    //蛇增加身体的方法
    addBody() {
        this.element.insertAdjacentHTML('beforeend', '<div></div>')
    }
    //添加一个蛇身体移动的方法
    moveBody() {
        //让后一个身体的位置等于前一个身体的位置即可，从后往前改，不然就对应不上了
        for (let i = this.bodies.length - 1; i > 0; i--) {
          //获取前边身体的位置
            let x = (this.bodies[i - 1] as HTMLElement).offsetLeft;
            let y = (this.bodies[i - 1] as HTMLElement).offsetTop;
            //将值设置到当前的身体上
            (this.bodies[i] as HTMLElement).style.left = `${x}px`;
            (this.bodies[i] as HTMLElement).style.top = `${y}px`;

        }
    }
    //检查头和身体是否相撞的方法
    checkHeadBody(){
        //获取所有的身体检查是否和蛇头的坐标发生重叠
        for(let i=1;i<this.bodies.length;i++){
            if(this.X === (this.bodies[i] as HTMLElement).offsetLeft&&this.Y===(this.bodies[i] as HTMLElement).offsetTop){
                throw new Error('撞到身体了')
            }
        }
    }

}
export default Snake

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>贪吃蛇</title>
</head>
<body>
    <!-- 主容器 -->
    <div class="main">
        <!-- 舞台 -->
        <div class="stage">
            <!-- 蛇容器 -->
            <div id="snake">
                <!-- 蛇的各个部分 -->
                <div></div>
            </div>
            <div id="food">
                <!-- 添加4个div设置蛇的样式 -->
                <div></div>
                <div></div>
                <div></div>
                <div></div>
                
            </div>
        </div>
        <!-- 计分板 -->
        <div class="score-panel">
            <div>
                SCORE:<span class="score">0</span>
            </div>
            <div>
                LEVEL:<span class="level">1</span>
            </div>
        </div>
    </div>
</body>
</html>

import './style/index.less'
import GameControl from './moduls/GameControl'
new GameControl();
   

@bgcl: #b7d4a8;

* {
    margin: 0;
    padding: 0;
    //改变盒子模型的计算方式
    box-sizing: border-box;
}

.main {
    width: 360px;
    height: 420px;
    background-color: @bgcl;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: solid 10px #000000;
    border-radius: 5%;
}

.stage {
    width: 304px;
    height: 304px;
    border: 2px solid black;
    margin: 20px 18px;
    //开启相对定位
    position: relative;

    #snake>div {
        width: 10px;
        height: 10px;
        background-color: #000000;
        border: 1px solid @bgcl;
        //开启绝对定位
        position: absolute;
    }
 
}
#food{
    width: 10px;
    height: 10px;
    border: 1px solid @bgcl;
    position: absolute;
    left: 200px;
    top: 100px;
    display: flex;
    flex-flow: row wrap;
    justify-content: space-between;
    align-content: space-between;
    &>div{
        width: 3px;
        height: 3px;
        background-color: #000000;
        transform: rotate(45deg);
       
    }
}

.score-panel {
    display: flex;
    width: 85%;
    margin: 10px auto;
    justify-content: space-between;
}

{
  "name": "part3",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "build": "webpack --mode production",
    "dev": "webpack --mode development",
    "start": "webpack serve --open "
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "@babel/core": "^7.20.7",
    "@babel/preset-env": "^7.20.2",
    "babel-loader": "^9.1.0",
    "clean-webpack-plugin": "^4.0.0",
    "core-js": "^3.26.1",
    "css-loader": "^6.7.3",
    "html-webpack-plugin": "^5.5.0",
    "less": "^4.1.3",
    "less-loader": "^11.1.0",
    "style-loader": "^3.3.1",
    "ts-loader": "^9.4.2",
    "typescript": "^4.9.4",
    "webpack": "^5.75.0",
    "webpack-cli": "^5.0.1",
    "webpack-dev-server": "^4.11.1"
  },
  "dependencies": {
    "-": "^0.0.1",
    "D": "^1.0.0",
    "postcss": "^8.4.21",
    "postcss-loader": "^7.0.2",
    "postcss-preset-env": "^7.8.3"
  }
}

{
    "compilerOptions": {
        "module": "ES2015",
        "target": "ES6",
        // "sourceMap": false,
        // "strict": true
    },
    "exclude": [
        "node_modules"
    ]
}

//引入path模块，管理路径
// import { Configuration } from 'webpack';//运行webpack时注释掉
/**
 * @type {Configuration}
 */
const path = require('path');
//引入html-webpack-plugin
const HTMLWEBPACKPLUGIN = require('html-webpack-plugin')
const { CleanWebpackPlugin } = require("clean-webpack-plugin")
//webpack中的所有配置信息都应写在module.exports中
module.exports = {
    //指定入口文件
    entry: './src/index.ts',
    //指定打包文件所在目录
    output: {
        //指定打包文件的目录
        // path:'./dist'
        path: path.resolve(__dirname, 'dist'),
        //打包后文件的文件名
        filename: "bundle.js",
        environment: {
            //配置打包的环境
            arrowFunction: false,//告诉webpack不使用箭头函数
            const:false,//告诉webpack不使用const
            
        }
    },
    //指定webpack打包时要使用的模块
    module: {
        //指定加载的规则
        rules: [
            {
                //指定规则生效的文件
                test: /\.ts$/,
                //要使用的loader,执行顺序从后往前
                use: [
                    {//配置babel
                        //指定加载器
                        loader: "babel-loader",
                        //设置babel
                        options: {
                            //设置预定义环境
                            presets: [
                                [
                                    //指定环境插件
                                    "@babel/preset-env",
                                    //配置信息
                                    {
                                        //要兼容的目标浏览器
                                        targets: {
                                            "chrome": "88",
                                            "ie": "11"
                                        },

                                        "corejs": "3",//指定core.js的版本
                                        // //使用core.js的方式
                                        "useBuiltIns": "usage",//"usage"表示按需加载

                                    },


                                ]
                            ]
                        }

                    },
                    "ts-loader"
                ],
                //指定要排除的文件
                exclude: /node_modules/,

            },
            //设置less文件的处理
            {
                test: /\.less$/,
                use: [
                   "style-loader",
                    "css-loader",
                    {
                        loader:"postcss-loader",
                        options:{
                        postcssOptions:{
                            plugins:[
                                [
                                    "postcss-preset-env",
                                    {
                                        browsers:'last 2 versions'
                                    }

                                ]
                            ]
                        }
                    }
                },
                    "less-loader"
                ]
            }
        ]
    },
    //配置webpack的插件
    plugins: [
        new CleanWebpackPlugin(),
        new HTMLWEBPACKPLUGIN({
            // title:'这是一个自定义的title'//用来配置自动生成的html文件的title
            template: "./src/index.html"//用来配置自动生成的html文件的模板
        })
    ],
    mode: 'development',
    resolve: {
        //设置引用模块
        extensions: ['.ts', '.js']//告诉webpack哪些后缀的文件可以被当做模块引用
    }

}