Pong MP

From dcb5d9477cbc2d721ab5424e888bd091a714d5ab Mon Sep 17 00:00:00 2001 From: Tom Smeding Date: Sat, 23 Jun 2018 20:42:38 +0200 Subject: Initial --- .gitignore | 1 + game.css | 33 +++ game.html | 16 ++ game.js | 243 ++++++++++++++++++++ package-lock.json | 647 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ package.json | 15 ++ server.js | 134 +++++++++++ 7 files changed, 1089 insertions(+) create mode 100644 .gitignore create mode 100644 game.css create mode 100644 game.html create mode 100644 game.js create mode 100644 package-lock.json create mode 100644 package.json create mode 100755 server.js diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..3c3629e --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +node_modules diff --git a/game.css b/game.css new file mode 100644 index 0000000..e1d198a --- /dev/null +++ b/game.css @@ -0,0 +1,33 @@ +html, body, #cvs { + margin: 0; + padding: 0; + width: 100%; + height: 100%; + overflow: hidden; +} + +body { + position: relative; + font-family: sans-serif; +} + +#overlay-container { + position: absolute; + left: 0; + top: 0; + right: 0; + bottom: 0; + align-items: center; + display: flex; + justify-content: center; +} + +#status { + color: #ffffff; + font-size: 40pt; + text-shadow: 0px 0px 3px #000000; + + user-select: none; + -moz-user-select: none; + -webkit-user-select: none; +} diff --git a/game.html b/game.html new file mode 100644 index 0000000..ac0f0cf --- /dev/null +++ b/game.html @@ -0,0 +1,16 @@ + + + +Pong MP + + + + + + +

+ + diff --git a/game.js b/game.js new file mode 100644 index 0000000..4be774a --- /dev/null +++ b/game.js @@ -0,0 +1,243 @@ +"use strict"; + +var boardRatio = 1.5; +var ballRadius = 0.01, padWidth = 0.01, padHeight = 0.15, padX = 0.01; +var padBaseSpeed = 0.8; + +var gameId; +var cvs, ctx, cvsW, cvsH, bdW, bdH, bdltX, bdltY; +var socket; +var playing = false, flip = false; +var ballX, ballY, ballVX, ballVY; +var padPos, padVel, pad2Pos, pad2Vel; + +function redraw() { + ctx.fillStyle = "#000000"; + ctx.fillRect(0, 0, cvsW, cvsH); + + redrawFast(); +} + +function calcBallX() {return bdltX + bdW * (flip ? 1 - ballX : ballX);} +function calcBallY() {return bdltY + bdH * ballY;} +function calcPadY() {return bdltY + bdH * ((flip ? pad2Pos : padPos) - padHeight / 2);} +function calcPad2Y() {return bdltY + bdH * ((flip ? padPos : pad2Pos) - padHeight / 2);} + +function redrawFast() { + ctx.strokeStyle = "#ffffff"; + ctx.lineWidth = 2; + ctx.strokeRect(bdltX - 1, bdltY - 1, bdW + 2, bdH + 2); + + ctx.lineWidth = 1; + ctx.beginPath(); + ctx.moveTo(bdltX + bdW / 2 | 0, bdltY); + ctx.lineTo(bdltX + bdW / 2 | 0, bdltY + bdH); + ctx.stroke(); + + if (playing) { + ctx.fillStyle = "#ffffff"; + ctx.beginPath(); + ctx.arc(calcBallX(), calcBallY(), ballRadius * bdW, 0, 2 * Math.PI); + ctx.rect(bdltX + bdW * padX, calcPadY(), bdW * padWidth, bdH * padHeight); + ctx.rect(bdltX + bdW * (1 - padX - padWidth), calcPad2Y(), bdW * padWidth, bdH * padHeight); + ctx.fill(); + } +} + +function undrawElements() { + ctx.fillStyle = "#000000"; + ctx.beginPath(); + ctx.rect( + calcBallX() - ballRadius * bdW - 2, calcBallY() - ballRadius * bdW - 2, + 2 * ballRadius * bdW + 4, 2 * ballRadius * bdW + 4); + ctx.rect( + bdltX + bdW * padX - 2, calcPadY() - 2, + bdW * padWidth + 4, bdH * padHeight + 4); + ctx.rect( + bdltX + bdW * (1 - padX - padWidth) - 2, calcPad2Y() - 2, + bdW * padWidth + 4, bdH * padHeight + 4); + ctx.fill(); +} + +function resizeHandler() { + var rect = cvs.getBoundingClientRect(); + cvsW = cvs.width = rect.width; + cvsH = cvs.height = rect.height; + // I believe this stuff is correct. + if (cvsH * boardRatio > cvsW) { + bdW = cvsW; + bdH = bdW / boardRatio | 0; + bdltX = 2; + bdltY = (cvsH - bdH) / 2 + 2 | 0; + bdW -= 4; bdH -= 4; + } else { + bdH = cvsH; + bdW = boardRatio * bdH | 0; + bdltX = (cvsW - bdW) / 2 + 2 | 0; + bdltY = 2; + bdW -= 4; bdH -= 4; + } + + redraw(); +} + +function displayStatus(msg) { + document.getElementById("status").innerHTML = msg; +} + +function openGame() { + socket = io(); + socket.on("redirect", function(url) { + location.href = url; + }); + + socket.on("status", function(msg) { + displayStatus(msg); + }); + + socket.on("serve", function(side, x, y) { + playing = true; + flip = side == "right"; + ballX = x; ballY = y; + padPos = pad2Pos = 0.5; + redraw(); + }); + + socket.on("stop", function() { + playing = false; + stopPhysicsLoop(); + stopGraphicsLoop(); + redraw(); + }); + + socket.on("startBall", function() { + initPhysics(); + ballVX = -0.5 / boardRatio; + ballVY = -0.5; + startPhysicsLoop(); + startGraphicsLoop(); + }); + + socket.on("start", function() { + initPhysics(); + ballVX = 0.5 / boardRatio; + ballVY = -0.5; + startPhysicsLoop(); + startGraphicsLoop(); + }); + + socket.on("padvec", function(pos, vel) { + pad2Pos = pos; + pad2Vel = vel; + }); + + socket.emit("open", gameId); +} + +var graphicsLoopId = null, physicsLoopId = null; + +function startGraphicsLoop() { + // undrawElements(); + redraw(); // TODO: redrawFast + graphicsLoopId = requestAnimationFrame(startGraphicsLoop); +} + +function stopGraphicsLoop() { + if (graphicsLoopId == null) return; + cancelAnimationFrame(graphicsLoopId); + graphicsLoopId = null; +} + +function startPhysicsLoop() { + var interval = 1 / 120; + physicsLoopId = setInterval(function() { + advancePhysics(interval); + }, interval * 1000); +} + +function stopPhysicsLoop() { + if (physicsLoopId == null) return; + clearInterval(physicsLoopId); + physicsLoopId = null; +} + +function initPhysics() { + ballX = ballY = 0.5; + ballVX = ballVY = 0; + padPos = pad2Pos = 0.5; + padVel = pad2Vel = 0; +} + +function advancePhysics(deltaT) { + var newballX = ballX + ballVX * deltaT; + var newballY = ballY + ballVY * deltaT; + var newpadPos = padPos + padVel * deltaT; + var newpad2Pos = pad2Pos + pad2Vel * deltaT; + + var t; + if (newballY <= ballRadius) { + t = (ballRadius - ballY) / ballVY; + } else if (newballY >= 1 - ballRadius) { + t = (1 - ballRadius - ballY) / ballVY; + } else { + t = -1; + } + if (t >= 0) { + newballY = ballY + ballVY * (2 * t - deltaT); + ballVY = -ballVY; + } + + if (newballX <= padX + padWidth + ballRadius && + Math.abs(newballY - padPos) < padHeight / 2 + ballRadius) { + t = (padX + padWidth + ballRadius - ballX) / ballVX; + } else if (newballX >= 1 - (padX + padWidth + ballRadius) && + Math.abs(newballY - pad2Pos) < padHeight / 2 + ballRadius) { + t = (1 - (padX + padWidth + ballRadius) - ballX) / ballVX; + } else { + t = -1; + } + if (t >= 0) { + newballX = ballX + ballVX * (2 * t - deltaT); + ballVX = -ballVX; + } + + ballX = newballX; + ballY = newballY; + padPos = newpadPos; + pad2Pos = newpad2Pos; +} + +function setupBindings() { + window.addEventListener("keydown", function(ev) { + if (ev.key == "w" || ev.key == "ArrowUp") { + padVel = -padBaseSpeed; + socket.emit("padvec", padPos, padVel); + } else if (ev.key == "s" || ev.key == "ArrowDown") { + padVel = padBaseSpeed; + socket.emit("padvec", padPos, padVel); + } + }); + + window.addEventListener("keyup", function(ev) { + if (ev.key == "w" || ev.key == "ArrowUp" || + ev.key == "s" || ev.key == "ArrowDown") { + padVel = 0; + socket.emit("padvec", padPos, padVel); + } + }); +} + +window.addEventListener("load", function() { + gameId = document.location.href.replace(/.*\//, ""); + + cvs = document.getElementById("cvs"); + ctx = cvs.getContext("2d"); + + resizeHandler(); + + setupBindings(); + + openGame(); +}); + +window.addEventListener("resize", resizeHandler); diff --git a/package-lock.json b/package-lock.json new file mode 100644 index 0000000..7c7e891 --- /dev/null +++ b/package-lock.json @@ -0,0 +1,647 @@ +{ + "name": "pongmp", + "version": "0.1.0", + "lockfileVersion": 1, + "requires": true, + "dependencies": { + "accepts": { + "version": "1.3.5", + "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.5.tgz", + "integrity": "sha1-63d99gEXI6OxTopywIBcjoZ0a9I=", + "requires": { + "mime-types": "~2.1.18", + "negotiator": "0.6.1" + } + }, + "after": { + "version": "0.8.2", + "resolved": "https://registry.npmjs.org/after/-/after-0.8.2.tgz", + "integrity": "sha1-/ts5T58OAqqXaOcCvaI7UF+ufh8=" + }, + "array-flatten": { + "version": "1.1.1", + "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz", + "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI=" + }, + "arraybuffer.slice": { + "version": "0.0.7", + "resolved": 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"description": "", + "main": "server.js", + "scripts": { + "test": "echo \"Error: no test specified\" && exit 1" + }, + "author": "Tom Smeding (https://tomsmeding.com)", + "license": "MIT", + "dependencies": { + "express": "^4.16.3", + "socket.io": "^2.1.1" + } +} diff --git a/server.js b/server.js new file mode 100755 index 0000000..81df97c --- /dev/null +++ b/server.js @@ -0,0 +1,134 @@ +#!/usr/bin/env node +const http = require("http"); +const express = require("express"); +const socketio = require("socket.io") + +const PORT = 8080; + +const app = express(); +const server = http.Server(app); +const io = socketio(server); + +// gameid -> {pl: [socket], started: Bool} +const games = new Map(); + +function genId() { + for (let i = 0; i < 10; i++) { + // 2176782336 == 36^6 + const id = ("000000" + (2176782336 * Math.random() | 0).toString(36)).slice(-6); + if (!games.has(id)) return id; + } + return ""; +} + +function validId(id) { + return /^[0-9a-z]{6}$/.test(id); +} + +app.get("/", (req, res) => { + const gameid = genId(); + if (gameid == "") { + res.sendStatus(500); + return; + } + res.redirect("/game/" + gameid); +}); + +app.param("gameid", (req, res, next, gameid) => { + if (!validId(gameid)) { + res.sendStatus(404); + } else { + next(); + } +}); + +app.get("/game/:gameid", (req, res) => { + res.sendFile(__dirname + "/game.html"); +}); + +app.get("/game.css", (req, res) => res.sendFile(__dirname + "/game.css")); +app.get("/game.js", (req, res) => res.sendFile(__dirname + "/game.js")); + +io.on("connection", (conn) => { + let gameid, gameobj; + conn.on("open", (id) => { + console.log("open " + id); + if (!validId(id)) { + console.log(" invalid"); + conn.emit("redirect", "/"); + conn.disconnect(true); + return; + } + gameobj = games.get(id); + if (gameobj != undefined) { + if (gameobj.pl.length == 1 && !gameobj.started) { + console.log(" serve"); + gameid = id; + gameobj.pl.push(conn); + gameobj.pl[0].emit("status", "Get ready..."); + gameobj.pl[1].emit("status", "Get ready..."); + gameobj.pl[0].emit("serve", "left", 0.5, 0.5); + gameobj.pl[1].emit("serve", "right", 0.5, 0.5); + gameobj.started = true; + setTimeout(() => { + if (!gameobj || gameobj.pl.length != 2) return; + gameobj.pl[0].emit("status", ""); + gameobj.pl[1].emit("status", ""); + gameobj.pl[0].emit("startBall"); + gameobj.pl[1].emit("start"); + }, 2000); + } else { + console.log(" full"); + gameobj = undefined; + conn.emit("status", "Game full! Opening new game..."); + setTimeout(() => { + conn.emit("redirect", "/"); + conn.disconnect(true); + }, 2000); + } + } else { + console.log(" new"); + gameid = id; + gameobj = {pl: [conn], started: false}; + games.set(gameid, gameobj); + conn.emit("status", "Waiting for other player..."); + } + }); + + conn.on("disconnect", () => { + if (gameobj == undefined) return; + + console.log("stop " + gameid); + + const newpl = []; + for (const p of gameobj.pl) { + if (p != conn) { + p.emit("stop"); + p.emit("status", "Other player left."); + setTimeout(() => { + p.emit("redirect", "/"); + p.disconnect(true); + }, 2000); + newpl.push(p); + } + } + + if (newpl.length == 0) { + console.log(" delete"); + games.delete(gameid); + } else { + gameobj.pl = newpl; + } + }); + + conn.on("padvec", (pos, vel) => { + if (!gameobj) return; + for (const p of gameobj.pl) { + if (p != conn) { + p.emit("padvec", pos, vel); + } + } + }); +}); + +server.listen(PORT, () => console.log("Listening on port " + PORT)); -- cgit v1.2.3-70-g09d2