我正在制作一个简单的Node.js游戏,它使用Express、Socket.io和Http服务器。所有用户都存储在服务器上的多维对象中。以下是服务器端代码的工作方式:
var express = require('express');
var app = express();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.use(express.static(__dirname + '/'));
var playerList = {};
createPlayer = function(array,width,height,spdx,spdy,x,y,color,name,id) {
var player = {
width:width,
height:height,
spdx:spdx,
spdy:spdy,
x:x,
y:y,
wKeyDown:false,
aKeyDown:false,
sKeyDown:false,
dKeyDown:false,
color:color,
name:name,
id:id
}
array[id] = player;
}
io.on('connection', function(socket) {
socket.on('new player', function(id, name) {
id = parseInt(id);
if (!playerList[id]) {
createPlayer(playerList,25,25,4,4,Math.round(Math.random() * 800),Math.round(Math.random() * 600),randomColor(),name,id);
}
socket.on('pressW', function(id, keyDown) {
playerList[id].wKeyDown = keyDown;
});
socket.on('pressA', function(id, keyDown) {
playerList[id].aKeyDown = keyDown;
});
socket.on('pressS', function(id, keyDown) {
playerList[id].sKeyDown = keyDown;
});
socket.on('pressD', function(id, keyDown) {
playerList[id].dKeyDown = keyDown;
});
});
socket.on('disconnect', function() {
});
};
sendPlayerList = function() {
//newPlayerList is used to prevent client from seeing other users IDs
var newPlayerList = {};
var count = 0;
for (var q in playerList) {
player = {
x:playerList[q].x,
y:playerList[q].y,
width:playerList[q].width,
height:playerList[q].height,
color:playerList[q].color,
name:playerList[q].name,
}
newPlayerList[count] = player;
count++;
}
io.emit('edit playerlist', newPlayerList);
}
SPLInterval = setInterval(sendPlayerList, 1000);
这里是客户端连接的代码:
var id;
$('#playbutton').click(function() {
var name = document.getElementById('name').value;
id = Math.floor(Date.now() * Math.random());
socket.emit('new player', id, name);
});
在客户端中,在更新循环中,当游戏想要告诉服务器您的输入时,它会像这样发出您的输入:
在客户端中,在更新循环中,当游戏想要告诉服务器您的输入时,它会像这样发出您的输入:
update = function() {
ctx.clearRect(0,0,canvas.width,canvas.height);
if (document.hasFocus()) {
socket.emit('pressD', id, dKeyDown);
socket.emit('pressS', id, sKeyDown);
socket.emit('pressA', id, aKeyDown);
socket.emit('pressW', id, wKeyDown);
}else{
socket.emit('pressD', id, false);
socket.emit('pressS', id, false);
socket.emit('pressA', id, false);
socket.emit('pressW', id, false);
}
clientUpdatePlayer();
updatePlayers();
}
}
var updateInterval = setInterval(update, 31.25);
更新玩家的函数只是根据服务器发送的玩家列表来绘制玩家。
我的问题是,当用户断开连接时,他们仍然留在玩家列表中。我不知道该如何解决这个问题。我通过获取客户端发送的 ID 来识别用户,但当他们断开连接时我无法获取用户的 ID。
还有很多代码,但我尽量只包含我认为必要的代码。如果需要的话,我可以提供更多代码。