Add game objects and server side simulation

.eslintrc

+{
+    "parserOptions": {
+        "sourceType": "module"
+    },
+    "rules":
+    {
+        "block-scoped-var": "error",
+        "camelcase": "warn",
+        "comma-dangle": ["error", "always-multiline"],
+        "consistent-return": "error",
+        "curly": "error",
+        "default-case": "error",
+        "eqeqeq": "error",
+        "guard-for-in": "error",
+        "no-alert": "error",
+        "no-console": "warn",
+        "no-else-return": "error",
+        "no-empty-function": "error",
+        "no-eval": "error",
+        "no-eq-null": "error",
+        "no-extend-native": "warn",
+        "no-extra-bind": "error",
+        "no-loop-func": "error",
+        "no-magic-numbers": ["warn", {"ignore": [0, 1, -1], "ignoreArrayIndexes": true}],
+        "no-multiple-empty-lines": ["warn", {"max": 1}],
+        "no-multi-spaces": "warn",
+        "no-new": "error",
+        "no-new-func": "error",
+        "no-new-wrappers": "error",
+        "no-unused-expressions": "error",
+        "no-useless-concat": "error",
+        "no-undef-init": "error",
+        "no-underscore-dangle": "error",
+        "no-param-reassign": "error",
+        "no-self-compare": "error",
+        "no-void": "error",
+        "no-with": "error",
+        "one-var": "error",
+        "quotes": ["warn", "double"],
+        "semi": "error",
+        "strict": "error",
+        "vars-on-top": "error",
+        "yoda": "error"
+    },
+    "env":
+    {
+        "es6": true,
+        "browser": true
+    },
+    "extends": "eslint:recommended"
+}
\ No newline at end of file

.jsbeautifyrc

+{
+// Details: https://github.com/victorporof/Sublime-HTMLPrettify#using-your-own-jsbeautifyrc-options
+"js": {
+    "allowed_file_extensions": ["js", "json", "jshintrc", "jsbeautifyrc"],
+    "brace_style": "collapse-preserve-inline",
+    "break_chained_methods": false, 
+    "e4x": false,
+    "eol": "\n",
+    "end_with_newline": false,
+    "indent_char": " ",
+    "indent_level": 0,
+    "indent_size": 2,
+    "indent_with_tabs": false,
+    "jslint_happy": false, 
+    "keep_array_indentation": false, 
+    "keep_function_indentation": false,
+    "max_preserve_newlines": 0, 
+    "preserve_newlines": true,
+    "space_after_anon_function": false,
+    "space_before_conditional": true, 
+    "space_in_empty_paren": false, 
+    "space_in_paren": false, 
+    "unescape_strings": false, 
+    "wrap_line_length": 80 
+  }
+}
\ No newline at end of file

index.js

-const http = require("http");
-const express = require("express");
-const cors = require("cors");
-const colyseus = require("colyseus");
-const monitor = require("@colyseus/monitor").monitor;
-const socialRoutes = require("@colyseus/social/express").default;
-const port = process.env.PORT || 2567;
-const app = express();
-const StarGazerRoom = require("./lib/rooms/StarGazerRoom");
+/* eslint-env node */
+
+const http = require("http"),
+  express = require("express"),
+  cors = require("cors"),
+  colyseus = require("colyseus"),
+  monitor = require("@colyseus/monitor").monitor,
+  socialRoutes = require("@colyseus/social/express").default,
+  StarGazerRoom = require("./lib/rooms/StarGazerRoom.js"),
+  Logger = require("./lib/utils/Logger.js"),
+  Config = require("./lib/config/ServerConfig.js");
+
+var app = express(),
+  server = http.createServer(app),
+  gameServer;
+
+Logger.enable();
 
 app.use(cors());
 app.use(express.json());
 
-const server = http.createServer(app);
-const gameServer = new colyseus.Server({
+gameServer = new colyseus.Server({
   server: server,
   express: app
 });
 
+gameServer.define(Config.getGameRoomName(), StarGazerRoom);
+// Must be set after game server is created
+app.use(Config.getSocialRoute(), socialRoutes);
+app.use(Config.getMonitorRoute(), monitor(gameServer));
+// Prrobably shoud be set after game server is created
+app.use(Config.getGameRoute(), express.static(Config.getGamePath()));
 
-gameServer.define("star_gazer_lab", StarGazerRoom);
-app.use("/", socialRoutes);
-app.use("/colyseus", monitor(gameServer));
-
-gameServer.listen(port);
-console.log(`Listening on ws://localhost:${ port }`)
+gameServer.listen(Config.getPort()); 
+Logger.log(`Listening on ws://localhost:${ Config.getPort() }`, "Server");
\ No newline at end of file

lib/config/GameConfig.js

+/* eslint-disable no-magic-numbers */
+
+var version,
+  fps,
+  mapWidth,
+  mapHeight,
+  maxGazePointAge,
+  gazePointRadius,
+  maxNumberOfEnemies,
+  enemySpawnDelay,
+  playerDamage;
+
+class GameConfiguration {
+
+  constructor() {}
+
+  reset() {
+    version = "$VERSION";
+    fps = 60;
+    mapWidth = 1920,
+    mapHeight = 1080;
+    maxGazePointAge = 500;
+    gazePointRadius = 15;
+    maxNumberOfEnemies = 10;
+    enemySpawnDelay = 500;
+    playerDamage = 100;
+  }
+
+  setVersion(value) {
+    version = value;
+  }
+
+  getVersion() {
+    return version;
+  }
+
+  setFPS(value) {
+    fps = value;
+  }
+
+  getFPS() {
+    return fps;
+  }
+
+  setMapWidth(value) {
+    mapWidth = value;
+  }
+
+  getMapWidth() {
+    return mapWidth;
+  }
+
+  setMapHeight(value) {
+    mapHeight = value;
+  }
+
+  getMapHeight() {
+    return mapHeight;
+  }
+
+  setMaxGazePointAge(value) {
+    maxGazePointAge = value;
+  }
+
+  getMaxGazePointAge() {
+    return maxGazePointAge;
+  }
+
+  setGazePointRadius(value) {
+    gazePointRadius = value;
+  }
+
+  getGazePointRadius() {
+    return gazePointRadius;
+  }
+
+  setGazePointColor(value) {
+    gazePointColor = value;
+  }
+
+  getGazePointColor() {
+    return gazePointColor;
+  }
+
+  setMaxNumberOfEnemies(value) {
+    maxNumberOfEnemies = value;
+  }
+
+  getMaxNumberOfEnemies() {
+    return maxNumberOfEnemies;
+  }
+
+  setEnemySpawnDelay(value) {
+    enemySpawnDelay = value;
+  }
+
+  getEnemySpawnDelay() {
+    return enemySpawnDelay;
+  }
+
+  setPlayerDamage(value) {
+    playerDamage = value;
+  }
+
+  getPlayerDamage() {
+    return playerDamage;
+  }
+
+}
+
+const Config = new GameConfiguration;
+Config.reset();
+
+module.exports = Config;
\ No newline at end of file

lib/config/ServerConfig.js

+/* eslint-disable no-magic-numbers */
+
+var port,
+socialRoute,
+monitorRoute,
+gameRoute,
+gamePath,
+gameRoomName;
+
+class ServerConfig {
+
+  constructor() {}
+
+  reset() {
+    port = process.env.PORT || 2567;
+    socialRoute = "/";
+    monitorRoute = "/colyseus";
+    gameRoute = "/game";
+    gamePath = "../StarGazerClient/build";
+    gameRoomName = "star_gazer_lab";
+  }
+
+  getPort() {
+    return port;
+  }
+
+  getSocialRoute() {
+    return socialRoute;
+  }
+
+  getMonitorRoute() {
+    return monitorRoute;
+  }
+
+  getGameRoute() {
+     return gameRoute;
+  }
+
+  getGamePath() {
+    return gamePath;
+  }
+
+  getGameRoomName() {
+    return gameRoomName;
+  }
+
+}
+
+const Config = new ServerConfig;
+Config.reset();
+
+module.exports = Config;
+

lib/game/Enemy.js

@@ -6,32 +6,37 @@ const DEFAULT_VELOCITY = 1,
     DEFAULT_WIDTH = 50,
     DEFAULT_HEIGHT = 50,
     DEFAULT_DAMAGE = 10,
-    DEFAULT_HIT_BOX_RADIUS = 30,
-    DEFAULT_ENEMY_COLOR = "#3f0d76",
-    DEFAULT_ENEMEY_TIP_COLOR = "#d2ccf3",
-    DEFAULT_ENEMY_HEALTH_COLOR = "#d2ccf3",
-    DEFAULT_ENEMY_HEALTH_WIDTH = 10,
-    DEFAULT_ENEMY_HEALTH_RADIUS = 50;
+    DEFAULT_HIT_BOX_RADIUS = 30;
 
 class Enemy extends GameObject {
 
-    constructor(x, y, width, height, hitBoxRadius, velocity, direction, color) {
+    constructor(x, y, width, height, hitBoxRadius, velocity, direction) {
         super(x, y, DEFAULT_WIDTH, DEFAULT_HEIGHT, DEFAULT_HIT_BOX_RADIUS,
-            DEFAULT_VELOCITY, direction, DEFAULT_ENEMY_COLOR);
-        this.lp = 100;
+            DEFAULT_VELOCITY, direction);
+        this.lp = DEFAULT_HEALTH;
+    this.damage = DEFAULT_DAMAGE;
+    }
+
+    setFocus() {
+        this.focus = true;
+    }
+
+    removeFocus() {
+        this.focus = false;
     }
 
     static createEnemy(rangeX, rangeY, targetX, targetY) {
         let xPos = parseInt(Math.random() * rangeX),
             yPos = parseInt(Math.random() * rangeY),
             direction = Math.atan2(targetY - yPos, targetX - xPos) * 180 / Math.PI;
-        return new Enemy(xPos, yPos, direction);
+        return new Enemy(xPos, yPos, DEFAULT_WIDTH, DEFAULT_HEIGHT, DEFAULT_HIT_BOX_RADIUS, DEFAULT_VELOCITY, direction);
     }
 
 }
 
 schema.defineTypes(Enemy, {
-    lp: "number"
+    lp: "number",
+    damage: "number"
 });
 
 

lib/game/GameObject.js

@@ -3,7 +3,7 @@ const Schema = schema.Schema;
 
 class GameObject extends Schema {
 
-  constructor(x, y, width, height, hitBoxRadius, velocity, direction, color) {
+  constructor(x, y, width, height, hitBoxRadius, velocity, direction) {
     super();
     this.x = x;
     this.y = y;
@@ -12,7 +12,6 @@ class GameObject extends Schema {
     this.hitBoxRadius = hitBoxRadius;
     this.velocity = velocity;
     this.direction = direction;
-    this.color = color;
   }
 
   update(delta) {
@@ -45,8 +44,7 @@ schema.defineTypes(GameObject, {
   width: "number",
   height: "number",
   velocity: "number",
-  direction: "number",
-  color: "string"
+  direction: "number"
 });
 
 module.exports = GameObject;
\ No newline at end of file

lib/game/GazePoint.js

+const schema = require("@colyseus/schema");
+const Schema = schema.Schema;
+
+class GazePoint extends Schema {
+
+  constructor(screenX, screenY) {
+    this.screenX = screenX;
+    this.screenY = screenY;
+    this.createdAt = Date.now();
+    this.id = this.createdAt;
+  }
+
+}
+
+schema.defineTypes(GazePoint, {
+    screenX: "number",
+    screenY: "number",
+    createdAt: "number",
+    player: "text",
+    id: "number",
+});
+
+module.exports = GazePoint;
\ No newline at end of file

lib/game/Planet.js

+const schema = require("@colyseus/schema"),
+    GameObject = require("./GameObject.js");
+
+const DEFAULT_HEALTH = 100,
+  DEFAULT_HIT_BOX_RADIUS = 270,
+  DEFAULT_WIDTH = 500,
+  DEFAULT_HEIGHT = 500;
+
+class Planet extends GameObject {
+
+  constructor(x, y) {
+    super(x, y, DEFAULT_WIDTH, DEFAULT_HEIGHT, DEFAULT_HIT_BOX_RADIUS,
+      0, 0);
+    this.lp = DEFAULT_HEALTH;
+  }
+
+}
+
+schema.defineTypes(Planet, {
+    lp: "number"
+});
+
+module.exports = Planet;
\ No newline at end of file

lib/game/StarGazerState.js

 const schema = require("@colyseus/schema"),
+    Logger = require("../utils/Logger.js"),
+    GazePoint = require("./GazePoint.js"),
     Enemy = require("./Enemy.js"),
+    Planet = require("./Planet.js"),
     Schema = schema.Schema,
     ArraySchema = schema.ArraySchema,
-    MAX_ENEMIES = 10,
-    ENEMY_SPAWN_DELAY = 1000;
-
-var lastEnemySpawn;
-
+    GameConfig = require("../config/GameConfig.js");
 
 class StarGazerState extends Schema {
 
     constructor() {
-        console.log("Initalizing game state");
+        Logger.log("Initalizing game state", "Game");
         super();
         this.stateType = "idle";
-        this.width = 1920;
-        this.height = 1080;
+        this.width = GameConfig.getMapWidth();
+        this.height = GameConfig.getMapHeight();
+        this.gazePoints = new ArraySchema();
+        this.planet = new Planet(GameConfig.getMapWidth()/2, GameConfig.getMapHeight());
         this.enemies = new ArraySchema();
+        this.lastUpdate = Date.now();
+        this.lastEnemySpawn = 0;
     }
 
     update(deltaTime) {
-        this.spawnEnemy();
+        let now = Date.now(),
+            delta = now - this.lastUpdate;
+        this.updateGazePoints(now);
+        this.updateEnemies(now, delta);
+        this.lastUpdate = Date.now();
     }
 
-    spawnEnemy() {
-        let now = Date.now();
-        if (lastEnemySpawn === undefined) {
-            this.addEnemy();
-            lastEnemySpawn = now;
-            return;
+    updateGazePoints(now) {
+        for (let i = this.gazePoints.length - 1; i >= 0; i--) {
+            let age = now - gazePoints[i].createdAt;
+            if (age > GameConfig.getMaxGazePointAge()) {
+                this.gazePoints.splice(i, 1);
+            } else {
+                this.gazePoints[i].relativeAge = age / GameConfig.getMaxGazePointAge();
+            }
         }
-        if ((now - lastEnemySpawn) > ENEMY_SPAWN_DELAY) {
-            this.addEnemy();
-            lastEnemySpawn = now;
-        }
-
     }
 
-    addEnemy() {
-        if (this.enemies.length < MAX_ENEMIES) {
-            this.enemies.push(new Enemy());
+    updateEnemies(now, delta) {
+        let currentGazePosition = this.gazePoints[this.gazePoints.length - 1];
+        if ((now - this.lastEnemySpawn) >= GameConfig.getEnemySpawnDelay()) {
+            if (this.enemies.length < GameConfig.getMaxNumberOfEnemies()) {
+                Logger.log("Add new enemy", "Game");
+                this.enemies.push(Enemy.createEnemy(GameConfig.getMapWidth(), 100, this.planet.x, this.planet.y));
+                this.lastEnemySpawn = now;
+            }
         }
+        for (let i = this.enemies.length - 1; i >= 0; i--) {
+            // Remove focus from enemy
+            this.enemies[i].removeFocus();
+            // Update enemy's position 
+            this.enemies[i].update(delta);
+            // Check if enemy has hit target
+            if (this.planet.isHitBy(this.enemies[i])) {
+                Logger.log(`Enemy hit target for ${this.enemies[i].damage} dmg`, "Game");
+                // Reduce planet health after enemy has hit
+                this.planet.health -= this.enemies[i].damage;
+                if (this.planet.health <= 0) {
+                    this.onWorldDestroyed();
+                }
+                // Remove enemy after it has hit target
+                this.enemies.splice(i, 1);
+                // Skip other checks if enemy has hit target
+                // TODO: Add exposion at last position 
+                continue;
+            }
+            // Skip other checks if no gaze data is available
+            if (currentGazePosition === undefined) {
+                continue;
+            }
+            // Check if enemy was hit
+            if (this.enemies[i].isHitBy({
+                    x: currentGazePosition.targetX,
+                    y: currentGazePosition.targetY,
+                })) {
+                // Set focus on currently watched enemy
+                this.enemies[i].setFocus();
+                // Update enemy's health 
+                this.enemies[i].health -= GameConfig.getPlayerDamage() / (1000 / delta);
+                // Remove enemy if destroyed
+                if (this.enemies[i].health <= 0) {
+                    Logger.log(`Enemy destroyed by player`, "Game");
+                    this.enemies.splice(i, 1);
+                    // TODO: Add exposion at last position 
+                }
+            }
+        }
+    }
+
+    onWorldDestroyed() {
+
     }
 }
 
@@ -48,6 +101,8 @@ schema.defineTypes(StarGazerState, {
     stateType: "string",
     width: "number",
     height: "number",
+    planet: Planet,
+    gazePoints: [GazePoint],
     enemies: [Enemy],
 });
 

lib/utils/Logger.js

+class Logger {
+
+  constructor() {
+    this.enabled = false;
+  }
+
+  enable() {
+    this.enabled = true;
+  }
+
+  disable() {
+    this.enabled = false;
+  }
+
+  log(msg, label) {
+    let time = new Date(),
+      hours = time.getUTCHours(),
+      minutes = time.getUTCMinutes(),
+      seconds = time.getUTCSeconds();
+    if (hours < 10) {
+      hours = "0" + hours;
+    }
+    if (minutes < 10) {
+      minutes = "0" + minutes;
+    }
+    if (seconds < 10) {
+      seconds = "0" + seconds;
+    }
+    if (this.enabled === false) {
+      return;
+    }
+    console.log(`[${label}]\t${hours}:${minutes}:${seconds} - ${msg}`);
+  }
+
+}
+
+module.exports = new Logger();
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