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30 changed files with 3 additions and 31491 deletions

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@ -1,8 +0,0 @@
namespace PongGame;
public enum GameStatus {
WaitingForPlayers,
InProgress,
Finished,
Paused,
}

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@ -1,7 +0,0 @@
namespace PongGame.Hubs;
public interface IPongClient {
Task GameStateChanged(GameStatus state);
Task ReceiveGameState(PongGameState state);
Task UsernameChanged(string value);
}

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@ -1,110 +0,0 @@
using System.Drawing;
namespace PongGame.Hubs;
/// <summary>
/// Pong game state saving the positions of the paddles and the ball.
/// The Pong board has aspect ratio 1:2 with height 500 and width 1000.
/// </summary>
public struct PongGameState {
public const float HEIGHT = 500.0f;
public const float WIDTH = 2 * HEIGHT;
public const float PADDLE1_OFFSET = WIDTH / 20;
public const float PADDLE2_OFFSET = WIDTH - PADDLE1_OFFSET;
public static readonly PongGameState Initial = new() {
BallState = PongBallState.Initial,
Paddle1 = PongPaddleState.Initial,
Paddle2 = PongPaddleState.Initial,
Status = GameStatus.WaitingForPlayers,
WinnerLeft = null
};
public PongPaddleState Paddle1;
public PongPaddleState Paddle2;
public PongBallState BallState;
public GameStatus Status;
public bool? WinnerLeft;
public static void Update(ref PongGameState state) {
if (state.Status is not GameStatus.InProgress) return;
PongPaddleState.Update(ref state.Paddle1);
PongPaddleState.Update(ref state.Paddle2);
PongBallState.Update(ref state.BallState);
var ballX = state.BallState.Pos.X;
if (ballX is < 0 or > WIDTH) {
state.WinnerLeft = ballX < 0;
state.Status = GameStatus.Finished;
return;
}
Collide(in state.Paddle1, ref state.BallState, true);
Collide(in state.Paddle2, ref state.BallState, false);
}
private static void Collide(in PongPaddleState paddle, ref PongBallState ballState, bool left) {
var paddleX = left ? PADDLE1_OFFSET : PADDLE2_OFFSET;
var intersection = RectangleF.Intersect(paddle.GetCollider(paddleX), ballState.GetCollider());
if (intersection.IsEmpty) return;
// TODO: continuous collision
var ratio = (ballState.Pos.Y - paddle.Height + PongPaddleState.PADDLE_HALF_LENGTH) / PongPaddleState.PADDLE_LENGTH;
// TODO: lesser angles
var upAngle = left ? MathF.PI * 3 / 8 : MathF.PI * 5 / 8;
var downAngle = left ? -MathF.PI * 3 / 8 : MathF.PI * 11 / 8;
// TODO: reflect ball on surface instead of launching
ballState.BallAngle = ratio * downAngle + (1 - ratio) * upAngle;
}
public struct PongBallState {
public const float BALL_SPEED = 2 * BALL_RADIUS;
public const float BALL_RADIUS = HEIGHT / 125;
public static readonly PongBallState Initial = new() {
BallAngle = 0.0f,
Pos = new() {
X = WIDTH / 2,
Y = HEIGHT / 2
}
};
public PointF Pos;
public float BallAngle;
public static void Update(ref PongBallState state) {
var (dy, dx) = MathF.SinCos(state.BallAngle);
state.Pos.X += BALL_SPEED * dx;
state.Pos.Y -= BALL_SPEED * dy;
if (state.Pos.Y < BALL_RADIUS
|| state.Pos.Y > HEIGHT - BALL_RADIUS)
state.BallAngle = 2 * MathF.PI - state.BallAngle;
}
public RectangleF GetCollider() => new(Pos.X - BALL_RADIUS, Pos.Y - BALL_RADIUS, 2 * BALL_RADIUS, 2 * BALL_RADIUS);
}
public struct PongPaddleState {
public const float PADDLE_LENGTH = HEIGHT / 10;
public const float PADDLE_HALF_LENGTH = PADDLE_LENGTH / 2;
public const float PADDLE_WIDTH = PADDLE_LENGTH / 5;
public const float PADDLE_SPEED = 8;
public static readonly PongPaddleState Initial = new() {
Direction = PongPaddleDirection.Stop,
Height = HEIGHT / 2
};
public float Height;
public PongPaddleDirection Direction;
public static void Update(ref PongPaddleState state) {
state.Height = Math.Clamp(state.Height - ((int)state.Direction) * PADDLE_SPEED, PADDLE_HALF_LENGTH, HEIGHT - PADDLE_HALF_LENGTH);
}
public RectangleF GetCollider(float x) => new(x - PADDLE_WIDTH / 2, Height - PADDLE_HALF_LENGTH, PADDLE_WIDTH, PADDLE_LENGTH);
}
}

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@ -1,76 +0,0 @@
using Microsoft.AspNetCore.SignalR;
namespace PongGame.Hubs;
public class PongHub : Hub<IPongClient> {
private const string PLAYER_KEY = "PLAYER";
private readonly PongLobby Lobby;
private readonly ILogger<PongHub> Logger;
public PongHub(PongLobby lobby, ILogger<PongHub> logger) : base() {
Lobby = lobby;
Logger = logger;
}
private PongPlayer Player {
get => (Context.Items.TryGetValue(PLAYER_KEY, out var player) ? player as PongPlayer : null)
?? throw new InvalidProgramException("Player was not assigned at connection start!");
set => Context.Items[PLAYER_KEY] = value;
}
public override Task OnConnectedAsync() {
Player = Lobby.CreatePlayer();
Player.Client = Clients.Client(Context.ConnectionId);
Player.Username = "Anon";
return Task.CompletedTask;
}
private void AssertNotInRoom() {
if (Player.ConnectedRoom is PongRoom currentRoom)
throw new HubException($"User is already connected to room [{currentRoom}]");
}
private PongRoom AssertInRoom() {
if (Player.ConnectedRoom is not PongRoom currentRoom)
throw new HubException($"User is not in any room!");
return currentRoom;
}
public Task<string> CreateRoom() {
AssertNotInRoom();
var room = Lobby.CreateRoom(Player);
return Task.FromResult(room.ID);
}
public Task<string> JoinRoom(string roomId) {
AssertNotInRoom();
var room = Lobby.JoinRoom(Player, roomId);
return Task.FromResult(room.ID);
}
public Task MovePaddle(int dir) {
var room = AssertInRoom();
var direction = (PongPaddleDirection)dir;
if (!Enum.IsDefined(direction))
throw new HubException($"Invalid direction: {dir}!");
room.MovePaddle(Player, direction);
return Task.CompletedTask;
}
public Task LeaveRoom() {
Lobby.LeaveRoom(Player);
return Task.CompletedTask;
}
public Task RequestUsernameChange(string username) {
// TOOD: check this
Logger.LogInformation($"Player {Player} requested username change to [{username}]");
Player.Username = username;
return Task.CompletedTask;
}
public override Task OnDisconnectedAsync(Exception? exception) {
Lobby.RemovePlayer(Player);
return Task.CompletedTask;
}
}

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@ -1,65 +0,0 @@
using System.Collections.Concurrent;
using Microsoft.AspNetCore.SignalR;
namespace PongGame.Hubs;
public class PongLobby {
private readonly HashSet<PongPlayer> connectedPlayers = new();
private readonly Dictionary<string, PongRoom> PongRooms = new();
public PongLobby(ILogger<PongLobby> logger)
=> Logger = logger;
public const int ROOM_ID_LENGTH = 4;
public PongPlayer CreatePlayer() {
var player = new PongPlayer();
lock (connectedPlayers)
connectedPlayers.Add(player);
return player;
}
public void RemovePlayer(PongPlayer player) {
if (player.ConnectedRoom is PongRoom room)
room.Leave(player);
lock (connectedPlayers)
_ = connectedPlayers.Remove(player);
}
public PongRoom CreateRoom(PongPlayer player) {
PongRoom room;
lock (PongRooms) {
room = new(GenerateRoomId(), Logger);
PongRooms.Add(room.ID, room);
}
room.Join(player);
return room;
}
public PongRoom JoinRoom(PongPlayer player, string roomId) {
PongRoom? room;
lock (PongRooms) {
room = PongRooms.GetValueOrDefault(roomId);
}
if (room is null) throw new HubException($"Room [{roomId}] not found!");
room.Join(player);
return room;
}
public void LeaveRoom(PongPlayer player) {
if (player.ConnectedRoom is PongRoom room)
room.Leave(player);
}
private readonly Random random = new();
private readonly ILogger<PongLobby> Logger;
private const string ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
private string GenerateRoomId() {
string id;
do {
id = string.Concat(Enumerable.Range(0, ROOM_ID_LENGTH).Select(_ => ALPHABET[random.Next(ALPHABET.Length)]));
} while (PongRooms.ContainsKey(id));
return id;
}
}

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@ -1,7 +0,0 @@
namespace PongGame;
public enum PongPaddleDirection {
Up = -1,
Stop,
Down,
}

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@ -1,22 +0,0 @@
using System.Diagnostics;
namespace PongGame.Hubs;
[DebuggerDisplay($"{{{nameof(ToString)}(),nq}}")]
public class PongPlayer {
private string username = default!;
public PongRoom? ConnectedRoom { get; internal set; }
public string Username {
get => username;
internal set {
if (username != value) {
username = value;
Task.Run(() => Client.UsernameChanged(value));
}
}
}
public IPongClient Client { get; internal set; } = default!;
public override string ToString() => $"[{Username}]";
}

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@ -1,99 +0,0 @@
using System.ComponentModel;
using Microsoft.AspNetCore.SignalR;
namespace PongGame.Hubs;
public class PongRoom {
public string ID { get; }
private readonly ILogger Logger;
private const string JOIN_LOG_TEMPLATE = "[{ID}] {Player} joined pong room as player {Number}!";
private const string LEAVE_LOG_TEMPLATE = "[{ID}] Player {Number} {Player} left pong room!";
private const string DIRECTION_LOG_TEMPLATE = "[{ID}] Player {Number} {player} moves paddle in direction: {direction}!";
public PongRoom(string id, ILogger logger) {
ID = id;
Logger = logger;
gameWorker.DoWork += GameLoop;
}
public PongPlayer? Player1 { get; private set; }
public PongPlayer? Player2 { get; private set; }
private PongGameState State = PongGameState.Initial;
public void Join(PongPlayer player) {
// TODO: synchronize this
if (Player1 is null) {
Player1 = player;
Logger.LogInformation(JOIN_LOG_TEMPLATE, ID, player, 1);
} else if (Player2 is null) {
Player2 = player;
Logger.LogInformation(JOIN_LOG_TEMPLATE, ID, player, 1);
} else
throw new HubException($"Lobby [{ID}] is already full!");
_ = Task.Run(PlayersChanged);
player.ConnectedRoom = this;
}
public void Leave(PongPlayer player) {
if (Player1 == player) {
Player1 = null;
Logger.LogInformation(LEAVE_LOG_TEMPLATE, ID, 1, player);
} else if (Player2 == player) {
Player2 = null;
Logger.LogInformation(LEAVE_LOG_TEMPLATE, ID, 2, player);
}
player.ConnectedRoom = null;
_ = Task.Run(PlayersChanged);
}
private BackgroundWorker gameWorker = new() {
WorkerSupportsCancellation = true
};
private void GameLoop(object? sender, DoWorkEventArgs e) {
while (!gameWorker.CancellationPending
&& Player1 is PongPlayer p1
&& Player2 is PongPlayer p2
&& State.Status is GameStatus.InProgress) {
PongGameState.Update(ref State);
_ = Task.Run(() => Task.WhenAll(
p1.Client.ReceiveGameState(State),
p2.Client.ReceiveGameState(State)));
Thread.Sleep(1000 / 60);
}
}
private Task PlayersChanged() {
if (Player1 is PongPlayer player1 && Player2 is PongPlayer player2) {
Logger.LogInformation("[{ID}] Pong game started: {player1} vs. {player2}", ID, player1, player2);
ResumeGame();
} else if (Player1 is null && Player2 is null) {
CloseRoom();
} else
PauseGame();
return Task.CompletedTask;
}
private void ResumeGame() {
State.Status = GameStatus.InProgress;
if (!gameWorker.IsBusy) gameWorker.RunWorkerAsync();
}
private void PauseGame() => State.Status = GameStatus.Paused;
private void CloseRoom() => State.Status = GameStatus.Finished;
public override string ToString() => $"[{ID}]";
public void MovePaddle(PongPlayer player, PongPaddleDirection direction) {
if (Player1 == player) {
State.Paddle1.Direction = direction;
Logger.LogInformation(DIRECTION_LOG_TEMPLATE, ID, 1, player, direction);
return;
} else if (Player2 == player) {
State.Paddle2.Direction = direction;
Logger.LogInformation(DIRECTION_LOG_TEMPLATE, ID, 2, player, direction);
return;
}
throw new InvalidOperationException("Player is not in this room, but moved! Assumably players room wasn't deleted.");
}
}

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@ -6,5 +6,4 @@
<div class="text-center">
<h1 class="display-4">Welcome</h1>
<a asp-area="" asp-page="/Pong">Pong</a>
</div>

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@ -9,7 +9,7 @@ public class IndexModel : PageModel {
_logger = logger;
}
public IActionResult OnGet() {
return RedirectToPage("Pong");
public void OnGet() {
}
}

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@ -1,30 +0,0 @@
@page
@model PongModel
@{
ViewData["Title"] = "Pong";
}
<div class="text-center">
<h1 class="display-4">Pong</h1>
<h3 id="connection">Connection Status</h3>
<button id="createlobby" class="btn btn-primary mb-3">Create</button>
<button id="leavelobby" class="btn btn-primary mb-3">Leave</button>
<div class="input-group mb-3">
<input id="roomid" type="text" class="form-control" placeholder="Room ID" aria-label="Room ID" aria-describedby="joinroom">
<button id="joinroom" class="btn btn-outline-secondary" type="button">Button</button>
</div>
<div class="input-group mb-3">
<input id="username" type="text" class="form-control" placeholder="Username" aria-label="Username" aria-describedby="setusername">
<button id="setusername" class="btn btn-outline-secondary" type="button">Set Username</button>
</div>
<div id="canvas-container" class="mb-3"></div>
</div>
<script src="~/lib/signalr/dist/browser/signalr.min.js"></script>
<script src="~/lib/signalr/dist/browser/signalr-protocol-msgpack.min.js"></script>
<script src="~/lib/pixi/dist/pixi.min.js"></script>
<script src="~/js/pong.js"></script>

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@ -1,15 +0,0 @@
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
namespace PongGame.Pages;
public class PongModel : PageModel {
private readonly ILogger<PongModel> _logger;
public PongModel(ILogger<PongModel> logger) {
_logger = logger;
}
public void OnGet() {
}
}

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@ -8,7 +8,6 @@
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Microsoft.AspNetCore.SignalR.Protocols.MessagePack" Version="6.0.10" />
<PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.17.0" />
</ItemGroup>

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@ -1,14 +1,7 @@
using MessagePack;
using PongGame.Hubs;
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
builder.Services.AddRazorPages();
builder.Services.AddSingleton<PongLobby>(services
=> new(services.GetRequiredService<ILogger<PongLobby>>()));
builder.Services.AddSignalR()
.AddMessagePackProtocol();
var app = builder.Build();
@ -22,9 +15,6 @@ app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints => {
endpoints.MapRazorPages();
endpoints.MapHub<PongHub>("/pong/hub");
});
app.MapRazorPages();
app.Run();

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@ -1,37 +0,0 @@
{
"version": "1.0",
"defaultProvider": "jsdelivr",
"libraries": [
{
"library": "@microsoft/signalr-protocol-msgpack@6.0.10",
"destination": "wwwroot/lib/signalr/",
"files": [
"dist/browser/signalr-protocol-msgpack.js",
"dist/browser/signalr-protocol-msgpack.js.map",
"dist/browser/signalr-protocol-msgpack.min.js",
"dist/browser/signalr-protocol-msgpack.min.js.map"
]
},
{
"library": "@microsoft/signalr@6.0.10",
"destination": "wwwroot/lib/signalr/",
"files": [
"dist/browser/signalr.js",
"dist/browser/signalr.js.map",
"dist/browser/signalr.min.js",
"dist/browser/signalr.min.js.map"
]
},
{
"provider": "jsdelivr",
"library": "pixi.js@7.0.2",
"destination": "wwwroot/lib/pixi/",
"files": [
"dist/pixi.js",
"dist/pixi.js.map",
"dist/pixi.min.js.map",
"dist/pixi.min.js"
]
}
]
}

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@ -1,169 +0,0 @@
"use strict";
const connection = new signalR.HubConnectionBuilder()
.withUrl("/pong/hub")
.withAutomaticReconnect()
.withHubProtocol(new signalR.protocols.msgpack.MessagePackHubProtocol())
.build();
function getElement(id) {
return document.getElementById(id) ?? console.error(`Element #${id} not found!`)
}
const connectionStatus = getElement("connection");
const createlobby = getElement("createlobby");
const roomidinput = getElement("roomid");
const joinroom = getElement("joinroom");
const usernameinput = getElement("username");
const setusername = getElement("setusername");
const leavelobby = getElement("leavelobby");
connection.onclose(function (error) {
if (error) {
connectionStatus.textContent = "Unexpected error!";
return console.error(`Connection aborted: ${error.message}`);
}
console.info("Disconnected!");
connectionStatus.textContent = "Closed!";
});
connection.onreconnecting(function (error) {
if (error) {
connectionStatus.textContent = "Reconnecting!";
return console.error(`Connection reconnecting: ${error.message}`);
}
console.info("Reconnecting!");
connectionStatus.textContent = "Reconnecting!";
});
connection.onreconnected(function (connectionId) {
console.info(`Connected as ${connectionId}!`);
connectionStatus.textContent = "Connected!";
});
createlobby.addEventListener("click", function (event) {
connection.invoke("CreateRoom").then(function (roomId) {
roomidinput.value = roomId;
console.info(`Joined room [${roomId}]`);
}).catch(function (err) {
return console.error(err.toString());
});
event.preventDefault();
});
connection.on("GameStateChanged", function (state) {
console.info(`Game is now in state ${state}`);
});
connection.on("UsernameChanged", function (username) {
console.info(`Username is now ${username}`);
usernameinput.value = username;
});
joinroom.addEventListener("click", function (event) {
connection.invoke("JoinRoom", roomidinput.value).catch(function (err) {
return console.error(err.toString());
});
event.preventDefault();
});
setusername.addEventListener("click", function (event) {
connection.invoke("RequestUsernameChange", usernameinput.value).catch(function (err) {
return console.error(err.toString());
});
event.preventDefault();
});
leavelobby.addEventListener("click", function (event) {
connection.invoke("LeaveRoom").catch(function (err) {
return console.error(err.toString());
});
event.preventDefault();
});
function movePaddle(direction) {
connection.invoke("MovePaddle", direction).catch(function (err) {
return console.error(err.toString());
});
}
function moveUp() { return movePaddle(-1); }
function stopPaddle() { return movePaddle(0); }
function moveDown() { return movePaddle(1); }
// Create the application helper and add its render target to the page
let app = new PIXI.Application({ width: 1000, height: 500 });
getElement('canvas-container').appendChild(app.view);
let graphics = new PIXI.Graphics();
app.stage.addChild(graphics);
function renderPaddle(graphics, state, xMid) {
var xLeft = xMid - 5;
graphics.beginFill(0x00FFFF);
graphics.drawRect(xLeft, state.Height - 25, 10, 50);
graphics.endFill();
}
function renderBall(graphics, state) {
graphics.beginFill(0xFF00FF);
graphics.drawCircle(state.Pos.X, state.Pos.Y, 4);
graphics.endFill();
}
function renderGameState(graphics, state) {
graphics.clear();
renderPaddle(graphics, state.Paddle1, 50);
renderPaddle(graphics, state.Paddle2, 1000 - 50);
renderBall(graphics, state.BallState);
}
connection.on("ReceiveGameState", function (state) {
renderGameState(graphics, state);
});
const keyEvent = (function () {
var upPressed = false;
var downPressed = false;
function moveUpdated() {
if (upPressed == downPressed) stopPaddle();
else if (upPressed) moveUp();
else if (downPressed) moveDown();
else console.error("unknown move!");
}
function handler(event) {
if (event.repeat) return;
if (event.path.indexOf(document.body) != 0) return; // only use key if it was pressed on empty space
var pressed = event.type == "keyup";
// W Key is 87, Up arrow is 87
// S Key is 83, Down arrow is 40
switch (event.keyCode) {
case 87:
case 38:
upPressed = pressed;
break;
case 83:
case 40:
downPressed = pressed;
break;
default: return;
}
event.preventDefault();
moveUpdated();
}
return handler;
})();
document.addEventListener('keydown', keyEvent);
document.addEventListener('keyup', keyEvent);
connection.start().then(function () {
console.info(`Connected!`);
connectionStatus.textContent = "Connected!";
}).catch(function (err) {
connectionStatus.textContent = "Connection failed!";
return console.error(err.toString());
});

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324
package-lock.json generated
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@ -1,324 +0,0 @@
{
"name": "PongGame",
"lockfileVersion": 2,
"requires": true,
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}
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"fetch-cookie": "^0.11.0",
"node-fetch": "^2.6.7",
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}
},
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"dependencies": {
"@microsoft/signalr": ">=6.0.10",
"@msgpack/msgpack": "^2.7.0"
}
},
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"engines": {
"node": ">= 10"
}
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"dependencies": {
"event-target-shim": "^5.0.0"
},
"engines": {
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}
},
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"engines": {
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View File

@ -1,6 +0,0 @@
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