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server.js
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server.js
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const { randomInt } = require("crypto");
let express = require("express");
let socket = require("socket.io");
let port = 3000;
let ip = Object.values(require('os').networkInterfaces()).reduce((r, list) => r.concat(list.reduce((rr, i) => rr.concat(i.family==='IPv4' && !i.internal && i.address || []), [])), []);
console.log("Starting Server ...");
console.log("server ip: " + ip);
let app = express();
let server = app.listen(port);
app.use(express.static("public"));
let io = socket(server);
let timeLeft = 60; // seconds
let window_sizeX = 1400;
let window_sizeY = 800;
let ball_posX = 200;
let ball_posY = 200;
let ball_radius = 40;
let ball_speedX = 0.7;
let ball_speedY = 0.7;
function constrain(value, minValue, maxValue) {
return Math.min(Math.max(value, minValue), maxValue);
}
setInterval(updateBall, 8);
// updates the ball position and sends it to the sketch
function updateBall() {
if (ball_posX + ball_radius >= window_sizeX || ball_posX - ball_radius <= 0) {
ball_speedX *= -1;
}
if (ball_posY + ball_radius >= window_sizeY || ball_posY - ball_radius <= 0) {
ball_speedY *= -1;
}
ball_speedX = constrain(ball_speedX, -5, 5);
ball_speedY = constrain(ball_speedY, -5, 5);
ball_posX += ball_speedX;
ball_posY += ball_speedY;
data = {
x : ball_posX,
y : ball_posY,
speedX : ball_speedX,
speedY : ball_speedY,
r : ball_radius,
}
io.sockets.emit("update", data);
}
setInterval(updateTimer, 1000);
function updateTimer() {
if(timeLeft > -1) {
data = {
timeLeft : timeLeft
};
io.sockets.emit("timer", data);
}
timeLeft--;
}
io.sockets.on("connection", newConnection);
function newConnection(socket) {
console.log("new connection: " + socket.id);
let paddleColour = randomInt(80, 220);
socket.on("paddle", paddleMsg);
function paddleMsg(data) {
let data2 = {
id: socket.id,
x: data.x,
y: data.y,
colour : paddleColour
};
// socket.broadcast.emit("paddle", data);
io.sockets.emit("paddle", data2);
}
socket.on("hit", ballUpdate);
function ballUpdate(data) {
ball_speedX = data.speedX;
ball_speedY = data.speedY;
ball_radius = data.r;
}
socket.on("disconnect", removePaddle);
function removePaddle() {
console.log(socket.id + ": disconected");
io.sockets.emit('removePaddle', {id: socket.id});
}
}
console.log("Server Started ...");