Initial commit

Game/Entity.js

@@ -0,0 +1,106 @@
+const EventScheduler 	= require("./EventScheduler");
+
+const constants 		= require("../Data/constants");
+const { TYPES, TIMING_EVENTS } = constants;
+const { ENTITY_TYPE_PLAYER } = TYPES;
+const { TIMING_EVENT_RESPAWN } = TIMING_EVENTS;
+
+class Entity extends EventScheduler {
+	constructor(info) {
+		const id = info.type === ENTITY_TYPE_PLAYER ? info.id : Entity.composeID(info.type - 1, info.id);
+		super(info.type, id, info.map.id);
+
+		this.isAlive = info.isAlive ?? true;
+		this.chunk = null;
+		this.type = null;
+		this.map = info.map;
+		this.typeID = info.type;
+		this.id = id;
+
+		const { map } = this;
+
+		if (info.position) {
+			const cell = info.map.grid.getCell(info.position.x, info.position.y);
+			const coordinate = info.map.grid.getCoords(cell.xw, cell.xh)
+
+			this.position = coordinate;
+		} else this.position = map.grid.randomNode(10);
+ 		
+		if (info.type !== ENTITY_TYPE_PLAYER) {
+			const currentChunk = this.getCurrentChunk();
+			map[currentChunk].addItem(id, this);
+
+			this.chunk = currentChunk;
+		};
+    };
+
+	static composeID(entityType, entityID) {
+		return ((entityType & 0xFF) << 24) | (entityID & 0xFFFFFF);
+	}
+
+	static getType(compositeID) {
+		return (compositeID >> 24) & 0xFF;
+	}
+
+	static getID(compositeID) {
+		return compositeID & 0xFFFFFF;
+	}
+
+	getCurrentChunk() {
+		return `chunk_${Math.floor(this.position.x / (10 * 120))}-${Math.floor(this.position.y / (10 * 90))}`;
+	}
+
+	removeFromChunk() {
+		if (!this.chunk) return;
+		
+		this.map[this.chunk].removeItem(this.id);
+
+		this.chunk = null;
+	}
+
+	updateChunk() {
+		const { chunk, map, id } = this;
+
+		const currentChunk = this.getCurrentChunk();
+		if (chunk !== currentChunk) {
+			this.removeFromChunk();
+		
+			map[currentChunk].addItem(id, this);
+			this.chunk = currentChunk;
+
+			this.chunkIndex = [Math.floor(this.position.x / (10 * 120)), Math.floor(this.position.y / (10 * 90))];
+
+			return true;
+		};
+
+		return false;
+	}
+	
+	die() {
+		if (!this.isAlive) return;
+
+		this.isAlive = false;
+		
+		this.removeFromChunk();
+				
+		const players = this.map.getLivingEntities([ENTITY_TYPE_PLAYER]);
+		players.forEach(p => delete p.inDistance[this.id]); // this is not efficient, should update
+	}
+
+	respawn(respawn = {}) {
+		if (this.isAlive) return;
+
+		this.isAlive = true;
+		this.position = respawn.position ? respawn.position : this.map.grid.randomNode(10);
+
+		this.updateChunk();
+
+		this.removeEvent(TIMING_EVENT_RESPAWN);
+	}
+
+	markActive() {
+		this.map[`chunkTest_${Math.floor(this.position.x / (10 * 120))}-${Math.floor(this.position.y / (10 * 90))}`].addItem(this.id, this);
+	}
+};
+
+module.exports = Entity;