this merge with master should come with the right backend stuff to make friendship requests work

srcs/requirements/svelte/api_front/public/game/audio.ts

@@ -0,0 +1,16 @@
+
+import * as c from "./constants.js"
+
+export const soundPongArr: HTMLAudioElement[] = [];
+export const soundRoblox = new Audio("http://localhost:8080/sound/roblox-oof.ogg");
+
+export function initAudio(muteFlag: boolean)
+{
+	for	(let i = 0; i <= 32; i++) {
+		soundPongArr.push(new Audio("http://localhost:8080/sound/pong/"+i+".ogg"));
+		soundPongArr[i].volume = c.soundPongVolume;
+		soundPongArr[i].muted = muteFlag;
+	}
+	soundRoblox.volume = c.soundRobloxVolume;
+	soundRoblox.muted = muteFlag;
+}

srcs/requirements/svelte/api_front/public/game/class/Event.ts

@@ -0,0 +1,107 @@
+
+import * as en from "../enums.js"
+
+/* From Server */
+class ServerEvent {
+	type: en.EventTypes;
+	constructor(type: en.EventTypes = 0) {
+		this.type = type;
+	}
+}
+
+class EventAssignId extends ServerEvent {
+	id: string;
+	constructor(id: string) {
+		super(en.EventTypes.assignId);
+		this.id = id;
+	}
+}
+
+class EventMatchmakingComplete extends ServerEvent {
+	side: en.PlayerSide;
+	constructor(side: en.PlayerSide) {
+		super(en.EventTypes.matchmakingComplete);
+		this.side = side;
+	}
+}
+
+class EventGameUpdate extends ServerEvent {
+	playerLeft = {
+		y: 0
+	};
+	playerRight = {
+		y: 0
+	};
+	ballsArr: {
+		x: number,
+		y: number,
+		dirX: number,
+		dirY: number,
+		speed: number
+	}[] = [];
+	wallTop? = {
+		y: 0
+	};
+	wallBottom? = {
+		y: 0
+	};
+	lastInputId = 0;
+	constructor() { // TODO: constructor that take GameComponentsServer maybe ?
+		super(en.EventTypes.gameUpdate);
+	}
+}
+
+class EventScoreUpdate extends ServerEvent {
+	scoreLeft: number;
+	scoreRight: number;
+	constructor(scoreLeft: number, scoreRight: number) {
+		super(en.EventTypes.scoreUpdate);
+		this.scoreLeft = scoreLeft;
+		this.scoreRight = scoreRight;
+	}
+}
+
+class EventMatchEnd extends ServerEvent {
+	winner: en.PlayerSide;
+	constructor(winner: en.PlayerSide) {
+		super(en.EventTypes.matchEnd);
+		this.winner = winner;
+	}
+}
+
+
+/* From Client */
+class ClientEvent {
+	type: en.EventTypes; // readonly ?
+	constructor(type: en.EventTypes = 0) {
+		this.type = type;
+	}
+}
+
+class ClientAnnounce extends ClientEvent {
+	role: en.ClientRole;
+	clientId: string;
+	matchOptions: en.MatchOptions;
+	constructor(role: en.ClientRole, matchOptions: en.MatchOptions, clientId: string = "") {
+		super(en.EventTypes.clientAnnounce);
+		this.role = role;
+		this.clientId = clientId;
+		this.matchOptions = matchOptions;
+	}
+}
+
+class EventInput extends ClientEvent {
+	input: en.InputEnum;
+	id: number;
+	constructor(input: en.InputEnum = en.InputEnum.noInput, id: number = 0) {
+		super(en.EventTypes.clientInput);
+		this.input = input;
+		this.id = id;
+	}
+}
+
+export {
+	ServerEvent, EventAssignId, EventMatchmakingComplete,
+	EventGameUpdate, EventScoreUpdate, EventMatchEnd,
+	ClientEvent, ClientAnnounce, EventInput
+}

srcs/requirements/svelte/api_front/public/game/class/GameArea.ts

@@ -0,0 +1,38 @@
+
+import * as c from ".././constants.js"
+
+class GameArea {
+	keys: string[] = [];
+	handleInputInterval: number = 0;
+	gameLoopInterval: number = 0;
+	drawLoopInterval: number = 0;
+	canvas: HTMLCanvasElement;
+	ctx: CanvasRenderingContext2D;
+	constructor() {
+		this.canvas = document.createElement("canvas");
+		this.ctx = this.canvas.getContext("2d") as CanvasRenderingContext2D;
+		this.canvas.width = c.CanvasWidth;
+		this.canvas.height = c.CanvasWidth / c.CanvasRatio;
+		let container = document.getElementById("canvas_container");
+		if (container)
+			container.insertBefore(this.canvas, container.childNodes[0]);
+	}
+	addKey(key: string) {
+		key = key.toLowerCase();
+		var i = this.keys.indexOf(key);
+		if (i == -1)
+			this.keys.push(key);
+	}
+	deleteKey(key: string) {
+		key = key.toLowerCase();
+		var i = this.keys.indexOf(key);
+		if (i != -1) {
+			this.keys.splice(i, 1);
+		}
+	}
+	clear() {
+		this.ctx.clearRect(0, 0, this.canvas.width, this.canvas.height);
+	}
+}
+
+export {GameArea}

srcs/requirements/svelte/api_front/public/game/class/GameComponents.ts

@@ -0,0 +1,65 @@
+
+import * as c from "../constants.js"
+import * as en from "../../shared_js/enums.js"
+import { VectorInteger } from "./Vector.js";
+import { Rectangle, MovingRectangle, Racket, Ball } from "./Rectangle.js";
+import { random } from "../utils.js";
+
+class GameComponents {
+	wallTop: Rectangle | MovingRectangle;
+	wallBottom: Rectangle | MovingRectangle;
+	playerLeft: Racket;
+	playerRight: Racket;
+	ballsArr: Ball[] = [];
+	constructor(options: en.MatchOptions)
+	{
+		const pos = new VectorInteger;
+
+		// Rackets
+		pos.assign(0+c.pw, c.h_mid-c.ph/2);
+		this.playerLeft = new Racket(pos, c.pw, c.ph, c.racketSpeed);
+		pos.assign(c.w-c.pw-c.pw, c.h_mid-c.ph/2);
+		this.playerRight = new Racket(pos, c.pw, c.ph, c.racketSpeed);
+	
+		// Balls
+		let ballsCount = 1;
+		if (options & en.MatchOptions.multiBalls) {
+			ballsCount = c.multiBallsCount;
+		}
+		pos.assign(-c.ballSize, -c.ballSize); // ball out =)
+		while (this.ballsArr.length < ballsCount) {
+			this.ballsArr.push(new Ball(pos, c.ballSize, c.ballSpeed, c.ballSpeedIncrease))
+		}
+		this.ballsArr.forEach((ball) => {
+			ball.dir.x = 1;
+			if (random() > 0.5) {
+				ball.dir.x *= -1;
+			}
+
+			ball.dir.y = random(0, 0.2);
+			if (random() > 0.5) {
+				ball.dir.y *= -1;
+			}
+
+			ball.dir = ball.dir.normalized();
+		});
+
+		// Walls
+		if (options & en.MatchOptions.movingWalls) {
+			pos.assign(0, 0);
+			this.wallTop = new MovingRectangle(pos, c.w, c.wallSize, c.movingWallSpeed);
+			(<MovingRectangle>this.wallTop).dir.y = -1;
+			pos.assign(0, c.h-c.wallSize);
+			this.wallBottom = new MovingRectangle(pos, c.w, c.wallSize, c.movingWallSpeed);
+			(<MovingRectangle>this.wallBottom).dir.y = 1;
+		}
+		else {
+			pos.assign(0, 0);
+			this.wallTop = new Rectangle(pos, c.w, c.wallSize);
+			pos.assign(0, c.h-c.wallSize);
+			this.wallBottom = new Rectangle(pos, c.w, c.wallSize);
+		}
+	}
+}
+
+export {GameComponents}

srcs/requirements/svelte/api_front/public/game/class/GameComponentsClient.ts

@@ -0,0 +1,114 @@
+
+import * as c from "../constants.js"
+import * as en from "../../shared_js/enums.js"
+import { Vector, VectorInteger } from "../../shared_js/class/Vector.js";
+import { TextElem, TextNumericValue } from "./Text.js";
+import { RectangleClient, MovingRectangleClient, RacketClient, BallClient, Line } from "./RectangleClient.js";
+import { GameComponents } from "../../shared_js/class/GameComponents.js";
+import { MovingRectangle } from "../../shared_js/class/Rectangle.js";
+
+class GameComponentsExtensionForClient extends GameComponents {
+	wallTop: RectangleClient | MovingRectangleClient;
+	wallBottom: RectangleClient | MovingRectangleClient;
+	playerLeft: RacketClient;
+	playerRight: RacketClient;
+	ballsArr: BallClient[];
+	constructor(options: en.MatchOptions, ctx: CanvasRenderingContext2D)
+	{
+		super(options);
+
+		// Rackets
+		const basePL = this.playerLeft;
+		const basePR = this.playerRight;
+		this.playerLeft = new RacketClient(
+		basePL.pos, basePL.width, basePL.height, basePL.baseSpeed,
+		ctx, "white");
+		this.playerRight = new RacketClient(
+		basePR.pos, basePR.width, basePR.height, basePR.baseSpeed,
+		ctx, "white");
+
+		// Balls
+		const newBallsArr: BallClient[] = [];
+		this.ballsArr.forEach((ball) => {
+			newBallsArr.push(new BallClient(ball.pos, ball.width, ball.baseSpeed, ball.speedIncrease,
+			ctx, "white")
+			);
+		});
+		this.ballsArr = newBallsArr;
+
+		// Walls
+		if (options & en.MatchOptions.movingWalls)
+		{
+			const baseWT = <MovingRectangle>this.wallTop;
+			const baseWB = <MovingRectangle>this.wallBottom;
+
+			this.wallTop = new MovingRectangleClient(baseWT.pos, baseWT.width, baseWT.height, baseWT.baseSpeed,
+			ctx, "grey");
+			(<MovingRectangleClient>this.wallTop).dir.assign(baseWT.dir.x, baseWT.dir.y);
+			
+			this.wallBottom = new MovingRectangleClient(baseWB.pos, baseWB.width, baseWB.height, baseWB.baseSpeed,
+			ctx, "grey");
+			(<MovingRectangleClient>this.wallBottom).dir.assign(baseWB.dir.x, baseWB.dir.y);
+		}
+		else
+		{
+			const baseWT = this.wallTop;
+			const baseWB = this.wallBottom;
+			this.wallTop = new RectangleClient(baseWT.pos, baseWT.width, baseWT.height,
+			ctx, "grey");
+			this.wallBottom = new RectangleClient(baseWB.pos, baseWB.width, baseWB.height,
+			ctx, "grey");
+		}
+	}
+}
+
+
+class GameComponentsClient extends GameComponentsExtensionForClient {
+	midLine: Line;
+	scoreLeft: TextNumericValue;
+	scoreRight: TextNumericValue;
+	text1: TextElem;
+
+	w_grid_mid: RectangleClient;
+	w_grid_u1: RectangleClient;
+	w_grid_d1: RectangleClient;
+	h_grid_mid: RectangleClient;
+	h_grid_u1: RectangleClient;
+	h_grid_d1: RectangleClient;
+	constructor(options: en.MatchOptions, ctx: CanvasRenderingContext2D)
+	{
+		super(options, ctx);
+		let pos = new VectorInteger;
+		// Scores
+		pos.assign(c.w_mid-c.scoreSize*1.6, c.scoreSize*1.5);
+		this.scoreLeft = new TextNumericValue(pos, c.scoreSize, ctx, "white");
+		pos.assign(c.w_mid+c.scoreSize*1.1, c.scoreSize*1.5);
+		this.scoreRight = new TextNumericValue(pos, c.scoreSize, ctx, "white");
+		this.scoreLeft.value = 0;
+		this.scoreRight.value = 0;
+		
+		// Text
+		pos.assign(0, c.h_mid);
+		this.text1 = new TextElem(pos, Math.floor(c.w/8), ctx, "white");
+	
+		// Dotted Midline
+		pos.assign(c.w_mid-c.midLineSize/2, 0+c.wallSize);
+		this.midLine = new Line(pos, c.midLineSize, c.h-c.wallSize*2, ctx, "white", 15);
+	
+		// Grid
+		pos.assign(0, c.h_mid);
+		this.w_grid_mid = new RectangleClient(pos, c.w, c.gridSize, ctx, "darkgreen");
+		pos.assign(0, c.h/4);
+		this.w_grid_u1 = new RectangleClient(pos, c.w, c.gridSize, ctx, "darkgreen");
+		pos.assign(0, c.h-c.h/4);
+		this.w_grid_d1 = new RectangleClient(pos, c.w, c.gridSize, ctx, "darkgreen");
+		pos.assign(c.w_mid, 0);
+		this.h_grid_mid = new RectangleClient(pos, c.gridSize, c.h, ctx, "darkgreen");
+		pos.assign(c.w/4, 0);
+		this.h_grid_u1 = new RectangleClient(pos, c.gridSize, c.h, ctx, "darkgreen");
+		pos.assign(c.w-c.w/4, 0);
+		this.h_grid_d1 = new RectangleClient(pos, c.gridSize, c.h, ctx, "darkgreen");
+	}
+}
+
+export {GameComponentsClient}

srcs/requirements/svelte/api_front/public/game/class/InputHistory.ts

@@ -0,0 +1,16 @@
+
+import * as en from "../../shared_js/enums.js"
+import * as ev from "../../shared_js/class/Event.js"
+
+class InputHistory {
+	input: en.InputEnum;
+	id: number;
+	deltaTime: number;
+	constructor(inputState: ev.EventInput, deltaTime: number) {
+		this.input = inputState.input;
+		this.id = inputState.id;
+		this.deltaTime = deltaTime;
+	}
+}
+
+export {InputHistory}

srcs/requirements/svelte/api_front/public/game/class/Rectangle.ts

@@ -0,0 +1,144 @@
+
+import { Vector, VectorInteger } from "./Vector.js";
+import { Component, Moving } from "./interface.js";
+import * as c from "../constants.js"
+
+class Rectangle implements Component {
+	pos: VectorInteger;
+	width: number;
+	height: number;
+	constructor(pos: VectorInteger, width: number, height: number) {
+		this.pos = new VectorInteger(pos.x, pos.y);
+		this.width = width;
+		this.height = height;
+	}
+	collision(collider: Rectangle): boolean {
+		const thisLeft = this.pos.x;
+		const thisRight = this.pos.x + this.width;
+		const thisTop = this.pos.y;
+		const thisBottom = this.pos.y + this.height;
+		const colliderLeft = collider.pos.x;
+		const colliderRight = collider.pos.x + collider.width;
+		const colliderTop = collider.pos.y;
+		const colliderBottom = collider.pos.y + collider.height;
+		if ((thisBottom < colliderTop)
+		|| (thisTop > colliderBottom)
+		|| (thisRight < colliderLeft)
+		|| (thisLeft > colliderRight)) {
+			return false;
+		}
+		else {
+			return true;
+		}
+	}
+}
+
+class MovingRectangle extends Rectangle implements Moving {
+	dir: Vector = new Vector(0,0);
+	speed: number;
+	readonly baseSpeed: number;
+	constructor(pos: VectorInteger, width: number, height: number, baseSpeed: number) {
+		super(pos, width, height);
+		this.baseSpeed = baseSpeed;
+		this.speed = baseSpeed;
+	}
+	move(delta: number) { // Math.floor WIP until VectorInteger debug
+		// console.log(`delta: ${delta}, speed: ${this.speed}, speed*delta: ${this.speed * delta}`);
+		// this.pos.x += Math.floor(this.dir.x * this.speed * delta);
+		// this.pos.y += Math.floor(this.dir.y * this.speed * delta);
+		this.pos.x += this.dir.x * this.speed * delta;
+		this.pos.y += this.dir.y * this.speed * delta;
+	}
+	moveAndCollide(delta: number, colliderArr: Rectangle[]) {
+		this._moveAndCollideAlgo(delta, colliderArr);
+	}
+	protected _moveAndCollideAlgo(delta: number, colliderArr: Rectangle[]) {
+		let oldPos = new VectorInteger(this.pos.x, this.pos.y);
+		this.move(delta);
+		if (colliderArr.some(this.collision, this)) {
+			this.pos = oldPos;
+		}
+	}
+}
+
+class Racket extends MovingRectangle {
+	constructor(pos: VectorInteger, width: number, height: number, baseSpeed: number) {
+		super(pos, width, height, baseSpeed);
+	}
+	moveAndCollide(delta: number, colliderArr: Rectangle[]) {
+		// let oldPos = new VectorInteger(this.pos.x, this.pos.y); // debug
+		this._moveAndCollideAlgo(delta, colliderArr);
+		// console.log(`y change: ${this.pos.y - oldPos.y}`);
+	}
+}
+
+class Ball extends MovingRectangle {
+	readonly speedIncrease: number;
+	ballInPlay: boolean = false;
+	constructor(pos: VectorInteger, size: number, baseSpeed: number, speedIncrease: number) {
+		super(pos, size, size, baseSpeed);
+		this.speedIncrease = speedIncrease;
+	}
+	bounce(collider?: Rectangle) {
+		this._bounceAlgo(collider);
+	}
+	protected _bounceAlgo(collider?: Rectangle) {
+		/* Could be more generic, but testing only Racket is enough,
+		because in Pong collider can only be Racket or Wall. */
+		if (collider instanceof Racket) {
+			this._bounceRacket(collider);
+		}
+		else {
+			this._bounceWall();
+		}
+	}
+	moveAndBounce(delta: number, colliderArr: Rectangle[]) {
+		this.move(delta);
+		let i = colliderArr.findIndex(this.collision, this);
+		if (i != -1)
+		{
+			this.bounce(colliderArr[i]);
+			this.move(delta);
+		}
+	}
+	protected _bounceWall() { // Should be enough for Wall
+		this.dir.y = this.dir.y * -1;
+	}
+	protected _bounceRacket(racket: Racket) {
+		this._bounceRacketAlgo(racket);
+	}
+	protected _bounceRacketAlgo(racket: Racket) {
+		this.speed += this.speedIncrease;
+
+		let x = this.dir.x * -1;
+
+		const angleFactorDegree = 60;
+		const angleFactor = angleFactorDegree / 90;
+		const racketHalf = racket.height/2;
+		const ballMid = this.pos.y + this.height/2;
+		const racketMid = racket.pos.y + racketHalf;
+
+		let impact = ballMid - racketMid;
+		const horizontalMargin = racketHalf * 0.15;
+		if (impact < horizontalMargin && impact > -horizontalMargin) {
+			impact = 0;
+		}
+		else if (impact > 0) {
+			impact = impact - horizontalMargin;
+		}
+		else if (impact < 0) {
+			impact = impact + horizontalMargin;
+		}
+
+		let y = impact / (racketHalf - horizontalMargin) * angleFactor;
+
+		this.dir.assign(x, y);
+		// Normalize Vector (for consistency in speed independent of direction)
+		if (c.normalizedSpeed) {
+			this.dir = this.dir.normalized();
+		}
+		// console.log(`x: ${this.dir.x}, y: ${this.dir.y}`);
+	}
+}
+
+export {Rectangle, MovingRectangle, Racket, Ball}

srcs/requirements/svelte/api_front/public/game/class/RectangleClient.ts

@@ -0,0 +1,141 @@
+
+import { Vector, VectorInteger } from "../../shared_js/class/Vector.js";
+import { Component, GraphicComponent, Moving } from "../../shared_js/class/interface.js";
+import { Rectangle, MovingRectangle, Racket, Ball } from "../../shared_js/class/Rectangle.js";
+import { soundPongArr } from "../audio.js"
+import { random } from "../utils.js";
+
+function updateRectangle(this: RectangleClient) {
+	this.ctx.fillStyle = this.color;
+	this.ctx.fillRect(this.pos.x, this.pos.y, this.width, this.height);
+}
+
+function clearRectangle(this: RectangleClient, pos?: VectorInteger) {
+	if (pos)
+		this.ctx.clearRect(pos.x, pos.y, this.width, this.height);
+	else
+		this.ctx.clearRect(this.pos.x, this.pos.y, this.width, this.height);
+}
+
+class RectangleClient extends Rectangle implements GraphicComponent {
+	ctx: CanvasRenderingContext2D;
+	color: string;
+	update: () => void;
+	clear: (pos?: VectorInteger) => void;
+	constructor(pos: VectorInteger, width: number, height: number,
+			ctx: CanvasRenderingContext2D, color: string)
+	{
+		super(pos, width, height);
+		this.ctx = ctx;
+		this.color = color;
+		this.update = updateRectangle;
+		this.clear = clearRectangle;
+	}
+	// update() {
+	// 	this.ctx.fillStyle = this.color;
+	// 	this.ctx.fillRect(this.pos.x, this.pos.y, this.width, this.height);
+	// }
+	// clear(pos?: VectorInteger) {
+	// 	if (pos)
+	// 		this.ctx.clearRect(pos.x, pos.y, this.width, this.height);
+	// 	else
+	// 		this.ctx.clearRect(this.pos.x, this.pos.y, this.width, this.height);
+	// }
+}
+
+class MovingRectangleClient extends MovingRectangle implements GraphicComponent {
+	ctx: CanvasRenderingContext2D;
+	color: string;
+	update: () => void;
+	clear: (pos?: VectorInteger) => void;
+	constructor(pos: VectorInteger, width: number, height: number, baseSpeed: number,
+			ctx: CanvasRenderingContext2D, color: string)
+	{
+		super(pos, width, height, baseSpeed);
+		this.ctx = ctx;
+		this.color = color;
+		this.update = updateRectangle;
+		this.clear = clearRectangle;
+	}
+}
+
+class RacketClient extends Racket implements GraphicComponent {
+	ctx: CanvasRenderingContext2D;
+	color: string;
+	update: () => void;
+	clear: (pos?: VectorInteger) => void;
+	constructor(pos: VectorInteger, width: number, height: number, baseSpeed: number,
+			ctx: CanvasRenderingContext2D, color: string)
+	{
+		super(pos, width, height, baseSpeed);
+		this.ctx = ctx;
+		this.color = color;
+		this.update = updateRectangle;
+		this.clear = clearRectangle;
+	}
+}
+
+class BallClient extends Ball implements GraphicComponent {
+	ctx: CanvasRenderingContext2D;
+	color: string;
+	update: () => void;
+	clear: (pos?: VectorInteger) => void;
+	constructor(pos: VectorInteger, size: number, baseSpeed: number, speedIncrease: number,
+		ctx: CanvasRenderingContext2D, color: string)
+	{
+		super(pos, size, baseSpeed, speedIncrease);
+		this.ctx = ctx;
+		this.color = color;
+		this.update = updateRectangle;
+		this.clear = clearRectangle;
+	}
+	bounce(collider?: Rectangle) {
+		this._bounceAlgo(collider);
+		soundPongArr[ Math.floor(random(0, soundPongArr.length)) ].play();
+	}
+	/* protected _bounceRacket(collider: Racket) {
+		this._bounceRacketAlgo(collider);
+		soundRoblox.play();
+	} */
+}
+
+function updateLine(this: Line) {
+	this.ctx.fillStyle = this.color;
+	let pos: VectorInteger = new VectorInteger;
+	let i = 0;
+	while (i < this.segmentCount)
+	{
+		// for Horizontal Line
+		// pos.y = this.pos.y;
+		// pos.x = this.pos.x + this.segmentWidth * i;
+		pos.x = this.pos.x;
+		pos.y = this.pos.y + this.segmentHeight * i;
+		this.ctx.fillRect(pos.x, pos.y, this.segmentWidth, this.segmentHeight);
+		i += 2;
+	}
+}
+
+class Line extends RectangleClient {
+	gapeCount: number = 0;
+	segmentCount: number;
+	segmentWidth: number;
+	segmentHeight: number;
+	constructor(pos: VectorInteger, width: number, height: number,
+			ctx: CanvasRenderingContext2D, color: string, gapeCount?: number)
+	{
+		super(pos, width, height, ctx, color);
+		this.update = updateLine;
+		if (gapeCount)
+			this.gapeCount = gapeCount;
+		this.segmentCount = this.gapeCount * 2 + 1;
+
+		this.segmentWidth = this.width;
+		this.segmentHeight = this.height / this.segmentCount;
+
+		// for Horizontal Line
+		// this.segmentWidth = this.width / this.segmentCount;
+		// this.segmentHeight = this.height;
+	}
+}
+
+export {RectangleClient, MovingRectangleClient, RacketClient, BallClient, Line}

srcs/requirements/svelte/api_front/public/game/class/Text.ts

@@ -0,0 +1,58 @@
+
+import { Vector, VectorInteger } from "../../shared_js/class/Vector.js";
+import { Component } from "../../shared_js/class/interface.js";
+
+// conflict with Text
+class TextElem implements Component {
+	ctx: CanvasRenderingContext2D;
+	pos: VectorInteger;
+	color: string;
+	size: number;
+	font: string;
+	text: string = "";
+	constructor(pos: VectorInteger, size: number,
+			ctx: CanvasRenderingContext2D, color: string, font: string = "Bit5x3")
+	{
+		// this.pos = Object.assign({}, pos); // create bug, Uncaught TypeError: X is not a function
+		this.pos = new VectorInteger(pos.x, pos.y);
+		this.size = size;
+		this.ctx = ctx;
+		this.color = color;
+		this.font = font;
+	}
+	update() {
+		this.ctx.font = this.size + "px" + " " + this.font;
+		this.ctx.fillStyle = this.color;
+		this.ctx.fillText(this.text, this.pos.x, this.pos.y);
+	}
+	clear() {
+		// clear no very accurate for Text 
+		// https://developer.mozilla.org/en-US/docs/Web/API/TextMetrics
+		let textMetric = this.ctx.measureText(this.text);
+		// console.log("textMetric.width = "+textMetric.width);
+		// console.log("size = "+this.size);
+		// console.log("x = "+this.pos.x);
+		// console.log("y = "+this.pos.y);
+		this.ctx.clearRect(this.pos.x - 1, this.pos.y-this.size + 1, textMetric.width, this.size);
+		// +1 and -1 because float imprecision (and Math.floor() with VectorInteger dont work for the moment)
+		// (or maybe its textMetric imprecision ?)
+	}
+}
+
+class TextNumericValue extends TextElem {
+	private _value: number = 0;
+	constructor(pos: VectorInteger, size: number,
+			ctx: CanvasRenderingContext2D, color: string, font?: string)
+	{
+		super(pos, size, ctx, color, font);
+	}
+	get value() {
+		return this._value;
+	}
+	set value(v: number) {
+		this._value = v;
+		this.text = v.toString();
+	}
+}
+
+export {TextElem, TextNumericValue}

srcs/requirements/svelte/api_front/public/game/class/Vector.ts

@@ -0,0 +1,49 @@
+
+class Vector {
+	x: number;
+	y: number;
+	constructor(x: number = 0, y: number = 0) {
+		this.x = x;
+		this.y = y;
+	}
+	assign(x: number, y: number) {
+		this.x = x;
+		this.y = y;
+	}
+	normalized() : Vector {
+		const normalizationFactor = Math.abs(this.x) + Math.abs(this.y);
+		return new Vector(this.x/normalizationFactor, this.y/normalizationFactor);
+	}
+}
+
+class VectorInteger extends Vector {
+	// PLACEHOLDER
+	// VectorInteger with set/get dont work (No draw on the screen). Why ?
+}
+
+/* 
+class VectorInteger {
+	// private _x: number = 0;
+	// private _y: number = 0;
+	// constructor(x: number = 0, y: number = 0) {
+	// 	this._x = x;
+	// 	this._y = y;
+	// }
+	// get x(): number {
+	// 	return this._x;
+	// }
+	// set x(v: number) {
+	// 	// this._x = Math.floor(v);
+	// 	this._x = v;
+	// }
+	// get y(): number {
+	// 	return this._y;
+	// }
+	// set y(v: number) {
+	// 	// this._y = Math.floor(v);
+	// 	this._y = v;
+	// }
+}
+*/
+
+export {Vector, VectorInteger}

srcs/requirements/svelte/api_front/public/game/class/interface.ts

@@ -0,0 +1,21 @@
+
+import { Vector, VectorInteger } from "./Vector.js";
+
+interface Component {
+	pos: VectorInteger;
+}
+
+interface GraphicComponent extends Component {
+	ctx: CanvasRenderingContext2D;
+	color: string;
+	update: () => void;
+	clear: (pos?: VectorInteger) => void;
+}
+
+interface Moving {
+	dir: Vector;
+	speed: number; // pixel per second
+	move(delta: number): void;
+}
+
+export {Component, GraphicComponent, Moving}

srcs/requirements/svelte/api_front/public/game/constants copy.ts

@@ -0,0 +1,26 @@
+
+export	const CanvasWidth = 1500;
+export	const CanvasRatio = 1.66666;
+/* ratio 5/3 (1.66) */
+
+export	const w = CanvasWidth;
+export	const h = CanvasWidth / CanvasRatio;
+export	const w_mid = Math.floor(w/2);
+export	const h_mid = Math.floor(h/2);
+export	const pw = Math.floor(w*0.017);
+export	const ph = pw*6;
+export	const ballSize = pw;
+export	const wallSize = Math.floor(w*0.01);
+export	const racketSpeed = Math.floor(w*0.66); // pixel per second
+export	const ballSpeed = Math.floor(w*0.66); // pixel per second
+export	const ballSpeedIncrease = Math.floor(ballSpeed*0.05); // pixel per second
+
+export	const normalizedSpeed = false; // for consistency in speed independent of direction
+
+export	const matchStartDelay = 3000; // millisecond
+export	const newRoundDelay = 1500; // millisecond
+
+// Game Variantes
+export	const multiBallsCount = 3;
+export	const movingWallPosMax = Math.floor(w*0.12);
+export	const movingWallSpeed = Math.floor(w*0.08);

srcs/requirements/svelte/api_front/public/game/constants.ts

@@ -0,0 +1,18 @@
+
+import { w } from "../shared_js/constants.js"
+export * from "../shared_js/constants.js"
+
+export	const midLineSize = Math.floor(w/150);
+export	const scoreSize = Math.floor(w/16); 
+export	const gridSize = Math.floor(w/500);
+
+// min interval on Firefox seems to be 15. Chrome can go lower.
+export	const handleInputIntervalMS = 15; // millisecond
+export	const sendLoopIntervalMS = 15; // millisecond // unused
+export	const gameLoopIntervalMS = 15; // millisecond
+export	const drawLoopIntervalMS = 15; // millisecond
+
+export	const fixedDeltaTime = gameLoopIntervalMS/1000; // second
+
+export	const soundRobloxVolume = 0.3; // between 0 and 1
+export	const soundPongVolume = 0.3; // between 0 and 1

srcs/requirements/svelte/api_front/public/game/draw.ts

@@ -0,0 +1,51 @@
+
+import { pong, gc } from "./global.js"
+import * as c from "./constants.js"
+import * as en from "../shared_js/enums.js"
+import { gridDisplay } from "./handleInput.js";
+
+function drawLoop()
+{
+	pong.clear();
+	
+	if (gridDisplay) {
+		drawGrid();
+	}
+
+	drawStatic();
+
+	gc.text1.update();
+
+	drawDynamic();
+}
+
+function drawDynamic()
+{
+	gc.scoreLeft.update();
+	gc.scoreRight.update();
+	gc.playerLeft.update();
+	gc.playerRight.update();
+	gc.ballsArr.forEach((ball) => {
+		ball.update();
+	});
+}
+
+function drawStatic()
+{
+	gc.midLine.update();
+	gc.wallTop.update();
+	gc.wallBottom.update();
+}
+
+function drawGrid()
+{
+	gc.w_grid_mid.update();
+	gc.w_grid_u1.update();
+	gc.w_grid_d1.update();
+	
+	gc.h_grid_mid.update();
+	gc.h_grid_u1.update();
+	gc.h_grid_d1.update();
+}
+
+export {drawLoop}

srcs/requirements/svelte/api_front/public/game/enums.ts

@@ -0,0 +1,47 @@
+
+enum EventTypes {
+	// Class Implemented
+	gameUpdate = 1,
+	scoreUpdate,
+	matchEnd,
+	assignId,
+	matchmakingComplete,
+
+	// Generic
+	matchmakingInProgress,
+	matchStart,
+	matchNewRound, // unused
+	matchPause, // unused
+	matchResume, // unused
+
+	// Client
+	clientAnnounce,
+	clientPlayerReady,
+	clientInput,
+
+}
+
+enum InputEnum {
+	noInput = 0,
+	up = 1,
+	down,
+}
+
+enum PlayerSide {
+	left = 1,
+	right
+}
+
+enum ClientRole {
+	player = 1,
+	spectator
+}
+
+enum MatchOptions {
+	// binary flags, can be mixed
+	noOption = 0b0,
+	multiBalls = 1 << 0,
+	movingWalls = 1 << 1
+}
+
+export {EventTypes, InputEnum, PlayerSide, ClientRole, MatchOptions}

srcs/requirements/svelte/api_front/public/game/gameLoop.ts

@@ -0,0 +1,49 @@
+
+import * as c from "./constants.js";
+import * as en from "../shared_js/enums.js"
+import { gc, matchOptions, clientInfo } from "./global.js";
+import { wallsMovements } from "../shared_js/wallsMovement.js";
+
+let actual_time: number = Date.now();
+let last_time: number;
+let delta_time: number;
+
+function gameLoop()
+{
+	/* last_time = actual_time;
+	actual_time = Date.now();
+	delta_time = (actual_time - last_time) / 1000; */
+
+	delta_time = c.fixedDeltaTime;
+	// console.log(`delta_gameLoop: ${delta_time}`);
+
+	// interpolation
+	// console.log(`dir.y: ${clientInfo.opponent.dir.y}, pos.y: ${clientInfo.opponent.pos.y}, opponentNextPos.y: ${clientInfo.opponentNextPos.y}`);
+	if (clientInfo.opponent.dir.y != 0 ) {
+		opponentInterpolation(delta_time);
+	}
+
+	// client prediction
+	gc.ballsArr.forEach((ball) => {
+		ball.moveAndBounce(delta_time, [gc.wallTop, gc.wallBottom, gc.playerLeft, gc.playerRight]);
+	});
+
+	if (matchOptions & en.MatchOptions.movingWalls) {
+		wallsMovements(delta_time, gc);
+	}
+}
+
+function opponentInterpolation(delta: number)
+{
+	// interpolation
+	clientInfo.opponent.moveAndCollide(delta, [gc.wallTop, gc.wallBottom]);
+
+	if ((clientInfo.opponent.dir.y > 0 && clientInfo.opponent.pos.y > clientInfo.opponentNextPos.y)
+	||  (clientInfo.opponent.dir.y < 0 && clientInfo.opponent.pos.y < clientInfo.opponentNextPos.y))
+	{
+		clientInfo.opponent.dir.y = 0;
+		clientInfo.opponent.pos.y = clientInfo.opponentNextPos.y;
+	}
+}
+
+export {gameLoop}

srcs/requirements/svelte/api_front/public/game/global.ts

@@ -0,0 +1,3 @@
+
+export {pong, gc, matchOptions} from "./pong.js"
+export {socket, clientInfo} from "./ws.js"

srcs/requirements/svelte/api_front/public/game/handleInput.ts

@@ -0,0 +1,110 @@
+
+import { pong, gc, socket, clientInfo } from "./global.js"
+import * as ev from "../shared_js/class/Event.js"
+import * as en from "../shared_js/enums.js"
+import { InputHistory }  from "./class/InputHistory.js"
+import * as c from "./constants.js";
+
+export let gridDisplay = false;
+
+let actual_time: number = Date.now();
+let last_time: number;
+let delta_time: number;
+
+const inputState: ev.EventInput = new ev.EventInput();
+const inputHistoryArr: InputHistory[] = [];
+
+// test
+/* export function sendLoop()
+{
+	socket.send(JSON.stringify(inputState));
+} */
+
+function handleInput()
+{
+	/* last_time = actual_time;
+	actual_time = Date.now();
+	delta_time = (actual_time - last_time) / 1000; */
+
+	delta_time = c.fixedDeltaTime;
+	// console.log(`delta_time: ${delta_time}`);
+
+	inputState.id = Date.now();
+	inputState.input = en.InputEnum.noInput;
+
+	const keys = pong.keys;
+	if (keys.length !== 0)
+	{
+		if (keys.indexOf("g") != -1)
+		{
+			gridDisplay = !gridDisplay;
+			pong.deleteKey("g");
+		}
+		playerMovements(delta_time, keys);
+	}
+
+	socket.send(JSON.stringify(inputState));
+	// setTimeout(testInputDelay, 100);
+	inputHistoryArr.push(new InputHistory(inputState, delta_time));
+
+	// client prediction
+	if (inputState.input !== en.InputEnum.noInput) {
+		// TODO: peut-etre le mettre dans game loop ?
+		// Attention au delta time dans ce cas !
+		playerMovePrediction(delta_time, inputState.input);
+	}
+}
+
+function playerMovements(delta: number, keys: string[])
+{
+	if (keys.indexOf("w") !== -1 || keys.indexOf("ArrowUp".toLowerCase()) !== -1)
+	{
+		if (keys.indexOf("s") === -1 && keys.indexOf("ArrowDown".toLowerCase()) === -1) {
+			inputState.input = en.InputEnum.up;
+		}
+	}
+	else if (keys.indexOf("s") !== -1 || keys.indexOf("ArrowDown".toLowerCase()) !== -1) {
+		inputState.input = en.InputEnum.down;
+	}
+}
+
+function testInputDelay() {
+	socket.send(JSON.stringify(inputState));
+}
+
+
+function playerMovePrediction(delta: number, input: en.InputEnum)
+{
+	// client prediction
+	const racket = clientInfo.racket;
+	if (input === en.InputEnum.up) {
+		racket.dir.y = -1;
+	}
+	else if (input === en.InputEnum.down) {
+		racket.dir.y = 1;
+	}
+	racket.moveAndCollide(delta, [gc.wallTop, gc.wallBottom]);
+}
+
+function repeatInput(lastInputId: number)
+{
+	// server reconciliation
+	let i = inputHistoryArr.findIndex((value: InputHistory) => {
+		if (value.id === lastInputId) {
+			return true;
+		}
+		return false;
+	});
+
+	// console.log(`inputHistory total: ${inputHistoryArr.length}` );
+	inputHistoryArr.splice(0, i+1);
+	// console.log(`inputHistory left: ${inputHistoryArr.length}` );
+	
+	inputHistoryArr.forEach((value: InputHistory) => {
+		if (value.input !== en.InputEnum.noInput) {
+			playerMovePrediction(value.deltaTime, value.input);
+		}
+	});
+}
+
+export {handleInput, repeatInput}

srcs/requirements/svelte/api_front/public/game/pong.ts

@@ -0,0 +1,99 @@
+
+initDom();
+function initDom() {
+	document.getElementById("play_pong_button").addEventListener("click", init);
+}
+
+import * as c from "./constants.js"
+import * as en from "../shared_js/enums.js"
+import { GameArea } from "./class/GameArea.js";
+import { GameComponentsClient } from "./class/GameComponentsClient.js";
+import { handleInput } from "./handleInput.js";
+// import { sendLoop } from "./handleInput.js";
+import { gameLoop } from "./gameLoop.js"
+import { drawLoop } from "./draw.js";
+import { countdown } from "./utils.js";
+import { initWebSocket } from "./ws.js";
+import { initAudio } from "./audio.js";
+
+
+/* Keys
+	Racket: W/S OR Up/Down
+	Grid On-Off: G
+*/
+
+/* TODO: A way to delay the init of variables, but still use "const" not "let" ? */
+export let pong: GameArea;
+export let gc: GameComponentsClient;
+export let matchOptions: en.MatchOptions = en.MatchOptions.noOption;
+
+function init()
+{
+	console.log("multi_balls:"+(<HTMLInputElement>document.getElementById("multi_balls")).checked);
+	console.log("moving_walls:"+(<HTMLInputElement>document.getElementById("moving_walls")).checked);
+	console.log("sound_on:"+(<HTMLInputElement>document.getElementById("sound_on")).checked);
+
+	let soundMutedFlag = false;
+	if ( (<HTMLInputElement>document.getElementById("sound_off")).checked ) {
+		soundMutedFlag = true;
+	}
+	initAudio(soundMutedFlag);
+
+	if ( (<HTMLInputElement>document.getElementById("multi_balls")).checked ) {
+		matchOptions |= en.MatchOptions.multiBalls;
+	}
+	if ( (<HTMLInputElement>document.getElementById("moving_walls")).checked ) {
+		matchOptions |= en.MatchOptions.movingWalls;
+	}
+
+	document.getElementById("div_game_options").hidden = true;
+
+	pong = new GameArea();
+	gc = new GameComponentsClient(matchOptions, pong.ctx);
+	initWebSocket(matchOptions);
+}
+
+function matchmaking()
+{
+	console.log("Searching an opponent...");
+	gc.text1.clear();
+	gc.text1.pos.assign(c.w/5, c.h_mid);
+	gc.text1.text = "Searching...";
+	gc.text1.update();
+}
+
+function matchmakingComplete()
+{
+	console.log("Match Found !");
+	gc.text1.clear();
+	gc.text1.pos.assign(c.w/8, c.h_mid);
+	gc.text1.text = "Match Found !";
+	gc.text1.update();
+}
+
+function startGame() {
+	gc.text1.pos.assign(c.w_mid, c.h_mid+c.h/4);
+	countdown(c.matchStartDelay/1000, (count: number) => {
+		gc.text1.clear();
+		gc.text1.text = `${count}`;
+		gc.text1.update();
+	}, resumeGame);
+}
+
+function resumeGame()
+{
+	gc.text1.text = "";
+	window.addEventListener('keydown', function (e) {
+		pong.addKey(e.key);
+	});
+	window.addEventListener('keyup', function (e) {
+		pong.deleteKey(e.key);
+	});
+	pong.handleInputInterval = window.setInterval(handleInput, c.handleInputIntervalMS);
+	// pong.handleInputInterval = window.setInterval(sendLoop, c.sendLoopIntervalMS);
+	pong.gameLoopInterval = window.setInterval(gameLoop, c.gameLoopIntervalMS);
+	pong.drawLoopInterval = window.setInterval(drawLoop, c.drawLoopIntervalMS);
+}
+
+
+export {matchmaking, matchmakingComplete, startGame}

srcs/requirements/svelte/api_front/public/game/utils copy.ts

@@ -0,0 +1,27 @@
+
+import { MovingRectangle } from "./class/Rectangle.js";
+
+function random(min: number = 0, max: number = 1) {
+	return Math.random() * (max - min) + min;
+}
+
+function sleep (ms: number) {
+	return new Promise((resolve) => setTimeout(resolve, ms));
+}
+
+function clamp(n: number, min: number, max: number) : number
+{
+	if (n < min)
+		n = min;
+	else if (n > max)
+		n = max;
+	return (n);
+}
+
+// Typescript hack, unused
+function assertMovingRectangle(value: unknown): asserts value is MovingRectangle {
+	// if (value !== MovingRectangle) throw new Error("Not a MovingRectangle");
+	return;
+}
+
+export {random, sleep, clamp, assertMovingRectangle}

srcs/requirements/svelte/api_front/public/game/utils.ts

@@ -0,0 +1,18 @@
+
+export * from "../shared_js/utils.js"
+
+function countdown(count: number, callback?: (count: number) => void, endCallback?: () => void)
+{
+	console.log("countdown ", count);
+	if (count > 0) {
+		if (callback) {
+			callback(count);
+		}
+		setTimeout(countdown, 1000, --count, callback, endCallback);
+	}
+	else if (endCallback) {
+		endCallback();
+	}
+}
+
+export {countdown}

srcs/requirements/svelte/api_front/public/game/wallsMovement.ts

@@ -0,0 +1,20 @@
+
+import * as c from "./constants.js";
+import { MovingRectangle } from "../shared_js/class/Rectangle.js";
+import { GameComponents } from "./class/GameComponents.js";
+
+function wallsMovements(delta: number, gc: GameComponents)
+{
+	const wallTop = <MovingRectangle>gc.wallTop;
+	const wallBottom = <MovingRectangle>gc.wallBottom;
+	if (wallTop.pos.y <= 0 || wallTop.pos.y >= c.movingWallPosMax) {
+		wallTop.dir.y *= -1;
+	}
+	if (wallBottom.pos.y >= c.h-c.wallSize || wallBottom.pos.y <= c.h-c.movingWallPosMax) {
+		wallBottom.dir.y *= -1;
+	}
+	wallTop.moveAndCollide(delta, [gc.playerLeft, gc.playerRight]);
+	wallBottom.moveAndCollide(delta, [gc.playerLeft, gc.playerRight]);
+}
+
+export {wallsMovements}

srcs/requirements/svelte/api_front/public/game/ws.ts

@@ -0,0 +1,182 @@
+
+import * as c from "./constants.js"
+import { gc, matchOptions } from "./global.js"
+import * as ev from "../shared_js/class/Event.js"
+import * as en from "../shared_js/enums.js"
+import { matchmaking, matchmakingComplete, startGame } from "./pong.js";
+import { RacketClient } from "./class/RectangleClient.js";
+import { repeatInput } from "./handleInput.js";
+import { soundRoblox } from "./audio.js"
+import { sleep } from "./utils.js";
+import { Vector, VectorInteger } from "../shared_js/class/Vector.js";
+
+class ClientInfo {
+	id = "";
+	side: en.PlayerSide;
+	racket: RacketClient;
+	opponent: RacketClient;
+	opponentNextPos: VectorInteger;
+}
+
+const wsPort = 8042;
+const wsUrl = "ws://" + document.location.hostname + ":" + wsPort + "/pong";
+export let socket: WebSocket; /* TODO: A way to still use "const" not "let" ? */
+export const clientInfo = new ClientInfo();
+
+export function initWebSocket(options: en.MatchOptions)
+{
+	socket = new WebSocket(wsUrl, "json");
+	socket.addEventListener("open", (event) => {
+		socket.send(JSON.stringify( new ev.ClientAnnounce(en.ClientRole.player, options, clientInfo.id) ));
+	});
+	// socket.addEventListener("message", logListener); // for testing purpose
+	socket.addEventListener("message", preMatchListener);
+}
+
+function logListener(this: WebSocket, event: MessageEvent) {
+	console.log("%i: " + event.data, Date.now());
+}
+
+function preMatchListener(this: WebSocket, event: MessageEvent)
+{
+	const data: ev.ServerEvent = JSON.parse(event.data);
+	switch (data.type) {
+		case en.EventTypes.assignId:
+			clientInfo.id = (<ev.EventAssignId>data).id;
+			break;
+		case en.EventTypes.matchmakingInProgress:
+			matchmaking();
+			break;
+		case en.EventTypes.matchmakingComplete:
+			clientInfo.side = (<ev.EventMatchmakingComplete>data).side;
+			if (clientInfo.side === en.PlayerSide.left)
+			{
+				clientInfo.racket = gc.playerLeft;
+				clientInfo.opponent = gc.playerRight;
+			}
+			else if (clientInfo.side === en.PlayerSide.right)
+			{
+				clientInfo.racket = gc.playerRight;
+				clientInfo.opponent = gc.playerLeft;
+			}
+			clientInfo.opponentNextPos = new VectorInteger(clientInfo.opponent.pos.x, clientInfo.opponent.pos.y);
+			clientInfo.racket.color = "darkgreen"; // for testing purpose
+			socket.send(JSON.stringify( new ev.ClientEvent(en.EventTypes.clientPlayerReady) )); // TODO: set an interval/timeout to resend until matchStart response (in case of network problem)
+			matchmakingComplete();
+			break;
+		case en.EventTypes.matchStart:
+			socket.removeEventListener("message", preMatchListener);
+			socket.addEventListener("message", inGameListener);
+			startGame();
+			break;
+	}
+}
+
+function inGameListener(event: MessageEvent)
+{
+	const data: ev.ServerEvent = JSON.parse(event.data);
+	switch (data.type) {
+		case en.EventTypes.gameUpdate:
+			// setTimeout(gameUpdate, 500, data as ev.EventGameUpdate); // artificial latency for testing purpose
+			gameUpdate(data as ev.EventGameUpdate);
+			break;
+		case en.EventTypes.scoreUpdate:
+			scoreUpdate(data as ev.EventScoreUpdate);
+			break;
+		case en.EventTypes.matchEnd:
+			matchEnd(data as ev.EventMatchEnd);
+			break;
+	}
+}
+
+function gameUpdate(data: ev.EventGameUpdate)
+{
+	console.log("gameUpdate");
+
+	if (matchOptions & en.MatchOptions.movingWalls) {
+		gc.wallTop.pos.y = data.wallTop.y;
+		gc.wallBottom.pos.y = data.wallBottom.y;
+	}
+
+	data.ballsArr.forEach((ball, i) => {
+		gc.ballsArr[i].pos.assign(ball.x, ball.y);
+		gc.ballsArr[i].dir.assign(ball.dirX, ball.dirY);
+		gc.ballsArr[i].speed = ball.speed;
+	});
+	/* // Equivalent to
+	gc.ballsArr.forEach((ball, i) => {
+		ball.pos.assign(data.ballsArr[i].x, data.ballsArr[i].y);
+		ball.dir.assign(data.ballsArr[i].dirX, data.ballsArr[i].dirY);
+		ball.speed = data.ballsArr[i].speed;
+	}); */
+
+	const predictionPos = new VectorInteger(clientInfo.racket.pos.x, clientInfo.racket.pos.y); // debug
+
+	if (clientInfo.side === en.PlayerSide.left) {
+		clientInfo.racket.pos.assign(clientInfo.racket.pos.x, data.playerLeft.y);
+	}
+	else if (clientInfo.side === en.PlayerSide.right) {
+		clientInfo.racket.pos.assign(clientInfo.racket.pos.x, data.playerRight.y);
+	}
+
+	// interpolation
+	clientInfo.opponent.pos.assign(clientInfo.opponentNextPos.x, clientInfo.opponentNextPos.y);
+	if (clientInfo.side === en.PlayerSide.left) {
+		clientInfo.opponentNextPos.assign(clientInfo.opponent.pos.x, data.playerRight.y);
+	}
+	else if (clientInfo.side === en.PlayerSide.right) {
+		clientInfo.opponentNextPos.assign(clientInfo.opponent.pos.x, data.playerLeft.y);
+	}
+
+	clientInfo.opponent.dir = new Vector(
+		clientInfo.opponentNextPos.x - clientInfo.opponent.pos.x,
+		clientInfo.opponentNextPos.y - clientInfo.opponent.pos.y
+	);
+
+	if (Math.abs(clientInfo.opponent.dir.x) + Math.abs(clientInfo.opponent.dir.y) !== 0) {
+		clientInfo.opponent.dir = clientInfo.opponent.dir.normalized();
+	}
+
+	// server reconciliation
+	repeatInput(data.lastInputId);
+
+	// debug
+	if (clientInfo.racket.pos.y > predictionPos.y + 1
+	||  clientInfo.racket.pos.y < predictionPos.y - 1)
+	{
+		console.log(
+			`Reconciliation error:
+			server y:         ${data.playerLeft.y}
+			reconciliation y: ${clientInfo.racket.pos.y}
+			prediction y:     ${predictionPos.y}`
+			);
+	}
+}
+
+function scoreUpdate(data: ev.EventScoreUpdate)
+{
+	// console.log("scoreUpdate");
+	if (clientInfo.side === en.PlayerSide.left && data.scoreRight > gc.scoreRight.value) {
+		soundRoblox.play();
+	}
+	else if (clientInfo.side === en.PlayerSide.right && data.scoreLeft > gc.scoreLeft.value) {
+		soundRoblox.play();
+	}
+	gc.scoreLeft.value = data.scoreLeft;
+	gc.scoreRight.value = data.scoreRight;
+}
+
+function matchEnd(data: ev.EventMatchEnd)
+{
+	if (data.winner === clientInfo.side) {
+		gc.text1.pos.assign(c.w*0.415, c.h_mid);
+		gc.text1.text = "WIN";
+	}
+	else {
+		gc.text1.pos.assign(c.w*0.383, c.h_mid);
+		gc.text1.text = "LOSE";
+	}
+	// matchEnded = true;
+}
+
+// export let matchEnded = false;