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简单的抢地盘js小游戏实战篇（多人在线对战）_yoqo.github.gane

作者：花生_TL007 | 2024-04-07 11:30:23

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yoqo.github.gane

 

今天来实现一个简单的多人联机在线对战的小游戏

index.js

  1. const http = require("http");
  2. const app = require("express")();
  3. app.get("/", (req,res)=> res.sendFile(__dirname + "/index.html"))
  4.  
  5. app.listen(9091, ()=>console.log("Listening on http port 9091"))
  6. const websocketServer = require("websocket").server
  7. const httpServer = http.createServer();
  8. httpServer.listen(9090, () => console.log("Listening.. on 9090"))
  9. //hashmap clients
  10. const clients = {};
  11. const games = {};
  12.  
  13. const wsServer = new websocketServer({
  14.     "httpServer": httpServer
  15. })
  16. wsServer.on("request", request => {
  17.     //connect
  18.     const connection = request.accept(null, request.origin);
  19.     connection.on("open", () => console.log("opened!"))
  20.     connection.on("close", () => console.log("closed!"))
  21.     connection.on("message", message => {
  22.         const result = JSON.parse(message.utf8Data)
  23.         //I have received a message from the client
  24.         //a user want to create a new game
  25.         if (result.method === "create") {
  26.             const clientId = result.clientId;
  27.             const gameId = guid();
  28.             games[gameId] = {
  29.                 "id": gameId,
  30.                 "balls": 20,
  31.                 "clients": []
  32.             }
  33.  
  34.             const payLoad = {
  35.                 "method": "create",
  36.                 "game" : games[gameId]
  37.             }
  38.  
  39.             const con = clients[clientId].connection;
  40.             con.send(JSON.stringify(payLoad));
  41.         }
  42.  
  43.         //a client want to join
  44.         if (result.method === "join") {
  45.  
  46.             const clientId = result.clientId;
  47.             const gameId = result.gameId;
  48.             const game = games[gameId];
  49.             if (game.clients.length >= 3)
  50.             {
  51.                 //sorry max players reach
  52.                 return;
  53.             }
  54.             const color =  {"0": "Red", "1": "Green", "2": "Blue"}[game.clients.length]
  55.             game.clients.push({
  56.                 "clientId": clientId,
  57.                 "color": color
  58.             })
  59.             //start the game
  60.             if (game.clients.length === 3) updateGameState();
  61.  
  62.             const payLoad = {
  63.                 "method": "join",
  64.                 "game": game
  65.             }
  66.             //loop through all clients and tell them that people has joined
  67.             game.clients.forEach(c => {
  68.                 clients[c.clientId].connection.send(JSON.stringify(payLoad))
  69.             })
  70.         }
  71.         //a user plays
  72.         if (result.method === "play") {
  73.             const gameId = result.gameId;
  74.             const ballId = result.ballId;
  75.             const color = result.color;
  76.             let state = games[gameId].state;
  77.             if (!state)
  78.                 state = {}
  79.  
  80.             state[ballId] = color;
  81.             games[gameId].state = state;
  82.  
  83.         }
  84.  
  85.     })
  86.  
  87.     //generate a new clientId
  88.     const clientId = guid();
  89.     clients[clientId] = {
  90.         "connection":  connection
  91.     }
  92.  
  93.     const payLoad = {
  94.         "method": "connect",
  95.         "clientId": clientId
  96.     }
  97.     //send back the client connect
  98.     connection.send(JSON.stringify(payLoad))
  99.  
  100. })
  101.  
  102.  
  103. function updateGameState(){
  104.  
  105.     //{"gameid", fasdfsf}
  106.     for (const g of Object.keys(games)) {
  107.         const game = games[g]
  108.         const payLoad = {
  109.             "method": "update",
  110.             "game": game
  111.         }
  112.  
  113.         game.clients.forEach(c=> {
  114.             clients[c.clientId].connection.send(JSON.stringify(payLoad))
  115.         })
  116.     }
  117.  
  118.     setTimeout(updateGameState, 500);
  119. }
  120.  
  121.  
  122.  
  123. function S4() {
  124.     return (((1+Math.random())*0x10000)|0).toString(16).substring(1);
  125. }
  126.  
  127. // then to call it, plus stitch in '4' in the third group
  128. const guid = () => (S4() + S4() + "-" + S4() + "-4" + S4().substr(0,3) + "-" + S4() + "-" + S4() + S4() + S4()).toLowerCase();

index.html

  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  6.     <title>Document</title>
  7. </head>
  8. <body>
  9. <h1>Ball Game</h1>
  10. <button id = 'btnCreate'>New Game</button>
  11. <button id = 'btnJoin'>Join Game</button>
  12. <input type = 'text' id = 'txtGameId'>
  13. <div id  = 'divPlayers'></div>
  14. <div id  = 'divBoard'></div>
  15.  
  16. <script>
  17.     //HTML elements
  18.     let clientId = null;
  19.     let gameId = null;
  20.     let playerColor = null;
  21.  
  22.     let ws = new WebSocket("ws://localhost:9090")
  23.     const btnCreate = document.getElementById("btnCreate");
  24.     const btnJoin = document.getElementById("btnJoin");
  25.     const txtGameId = document.getElementById("txtGameId");
  26.     const divPlayers = document.getElementById("divPlayers");
  27.     const divBoard = document.getElementById("divBoard");
  28.  
  29.  
  30.     //wiring events
  31.     btnJoin.addEventListener("click", e => {
  32.  
  33.         if (gameId === null)
  34.             gameId = txtGameId.value;
  35.  
  36.         const payLoad = {
  37.             "method": "join",
  38.             "clientId": clientId,
  39.             "gameId": gameId
  40.         }
  41.  
  42.         ws.send(JSON.stringify(payLoad));
  43.  
  44.     })
  45.  
  46.     btnCreate.addEventListener("click", e => {
  47.  
  48.         const payLoad = {
  49.             "method": "create",
  50.             "clientId": clientId
  51.         }
  52.  
  53.         ws.send(JSON.stringify(payLoad));
  54.  
  55.     })
  56.  
  57.     ws.onmessage = message => {
  58.         //message.data
  59.         const response = JSON.parse(message.data);
  60.         //connect
  61.         if (response.method === "connect"){
  62.             clientId = response.clientId;
  63.             console.log("Client id Set successfully " + clientId)
  64.         }
  65.  
  66.         //create
  67.         if (response.method === "create"){
  68.             gameId = response.game.id;
  69.             console.log("game successfully created with id " + response.game.id + " with " + response.game.balls + " balls")
  70.         }
  71.  
  72.  
  73.         //update
  74.         if (response.method === "update"){
  75.             //{1: "red", 1}
  76.             if (!response.game.state) return;
  77.             for(const b of Object.keys(response.game.state))
  78.             {
  79.                 const color = response.game.state[b];
  80.                 const ballObject = document.getElementById("ball" + b);
  81.                 ballObject.style.backgroundColor = color
  82.             }
  83.  
  84.         }
  85.  
  86.         //join
  87.         if (response.method === "join"){
  88.             const game = response.game;
  89.  
  90.             while(divPlayers.firstChild)
  91.                 divPlayers.removeChild (divPlayers.firstChild)
  92.  
  93.             game.clients.forEach (c => {
  94.  
  95.                 const d = document.createElement("div");
  96.                 d.style.width = "200px";
  97.                 d.style.background = c.color
  98.                 d.textContent = c.clientId;
  99.                 divPlayers.appendChild(d);
  100.  
  101.                 if (c.clientId === clientId) playerColor = c.color;
  102.             })
  103.  
  104.  
  105.             while(divBoard.firstChild)
  106.                 divBoard.removeChild (divBoard.firstChild)
  107.  
  108.             for (let i = 0; i < game.balls; i++){
  109.  
  110.                 const b = document.createElement("button");
  111.                 b.id = "ball" + (i +1);
  112.                 b.tag = i+1
  113.                 b.textContent = i+1
  114.                 b.style.width = "150px"
  115.                 b.style.height = "150px"
  116.                 b.addEventListener("click", e => {
  117.                     b.style.background = playerColor
  118.                     const payLoad = {
  119.                         "method": "play",
  120.                         "clientId": clientId,
  121.                         "gameId": gameId,
  122.                         "ballId": b.tag,
  123.                         "color": playerColor
  124.                     }
  125.                     ws.send(JSON.stringify(payLoad))
  126.                 })
  127.                 divBoard.appendChild(b);
  128.             }
  129.  
  130.  
  131.  
  132.  
  133.         }
  134.     }
  135. </script>
  136. </body>
  137. </html>

package.json

  1. {
  2.   "name": "websocket-cell-game",
  3.   "version": "1.0.0",
  4.   "description": "",
  5.   "main": "index.js",
  6.   "scripts": {
  7.     "test": "echo \"Error: no test specified\" && exit 1"
  8.   },
  9.   "keywords": [],
  10.   "author": "",
  11.   "license": "ISC",
  12.   "dependencies": {
  13.     "express": "^4.17.3",
  14.     "websocket": "^1.0.31"
  15.   }
  16. }

 

 package-lock.json

  1. {
  2.   "name": "websocket-cell-game",
  3.   "version": "1.0.0",
  4.   "lockfileVersion": 2,
  5.   "requires": true,
  6.   "packages": {
  7.     "": {
  8.       "name": "websocket-cell-game",
  9.       "version": "1.0.0",
  10.       "license": "ISC",
  11.       "dependencies": {
  12.         "express": "^4.17.3",
  13.         "websocket": "^1.0.31"
  14.       }
  15.     },
  16.     "node_modules/accepts": {
  17.       "version": "1.3.8",
  18.       "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
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  20.       "dependencies": {
  21.         "mime-types": "~2.1.34",
  22.         "negotiator": "0.6.3"
  23.       },
  24.       "engines": {
  25.         "node": ">= 0.6"
  26.       }
  27.     },
  28.     "node_modules/array-flatten": {
  29.       "version": "1.1.1",
  30.       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
  31.       "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
  32.     },
  33.     "node_modules/body-parser": {
  34.       "version": "1.19.2",
  35.       "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.19.2.tgz",
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  37.       "dependencies": {
  38.         "bytes": "3.1.2",
  39.         "content-type": "~1.0.4",
  40.         "debug": "2.6.9",
  41.         "depd": "~1.1.2",
  42.         "http-errors": "1.8.1",
  43.         "iconv-lite": "0.4.24",
  44.         "on-finished": "~2.3.0",
  45.         "qs": "6.9.7",
  46.         "raw-body": "2.4.3",
  47.         "type-is": "~1.6.18"
  48.       },
  49.       "engines": {
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  51.       }
  52.     },
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  57.       "engines": {
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  59.       }
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  61.     "node_modules/content-disposition": {
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最后一步，在项目目录右击在命令行输入 node index.js  

要是报错可以看下有什么express之类的需要下载

 浏览器打开输入

http://localhost:9091/

f12进入无敌模式 点击console，选中框内的，也就是相当于房间号

 

打开另一个浏览器， 输入方便号直接开始游玩 

 

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