129 lines
3.4 KiB
JavaScript
129 lines
3.4 KiB
JavaScript
// Node.
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import msgpack from 'msgpack-lite';
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import {performance} from 'perf_hooks';
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// 3rd party.
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// 2nd party.
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import {InputPacket} from '@avocado/input';
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import {World} from '@avocado/physics/matter/world';
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import {Synchronizer} from '@avocado/state';
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import {Ticker} from '@avocado/timing';
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import {Room} from '@avocado/topdown';
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// 1st party.
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import {SelfEntityPacket} from '../common/packets/self-entity.packet';
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import {WorldTime} from '../common/world-time';
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import {createEntityForConnection} from './create-entity-for-connection';
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// Create game.
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export default class Game {
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constructor() {
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const config = this.readConfig();
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// Room.
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this.room = undefined;
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Room.load('/kitty-fire.room.json').then((room) => {
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room.world = new World();
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room.world.stepTime = config.simulationInterval;
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this.synchronizer.addChild(room);
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this.room = room;
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});
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// World time. Start at 10 am for testing.
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this.worldTime = new WorldTime();
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this.worldTime.hour = 10;
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// Entity tracking.
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this.informables = [];
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// State synchronization.
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this.synchronizer = new Synchronizer([
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this.worldTime,
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]);
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this.informTicker = new Ticker(config.informInterval);
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this.informTicker.on('tick', this.inform, this);
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// Simulation.
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this.mainLoopHandle = setInterval(
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this.createMainLoop(),
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1000 * config.simulationInterval
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);
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}
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destroy(fn) {
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clearInterval(this.mainLoopHandle);
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if (this.room) {
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this.room.destroy();
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}
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fn();
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}
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acceptConnection(socket) {
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// Create and track a new entity for the connection.
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const entity = createEntityForConnection(socket);
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// Track informables.
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this.informables.push(entity);
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entity.on('destroyed', () => {
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const index = this.informables.indexOf(entity);
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if (-1 !== index) {
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this.informables.splice(index, 1);
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}
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});
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// Add entity to room.
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if (this.room) {
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this.room.addEntityToLayer(entity, 0);
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}
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// Initial information.
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const packets = this.synchronizer.packetsForUpdate(true);
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packets.unshift(new SelfEntityPacket(entity.numericUid));
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entity.inform(packets);
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// Listen for events.
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socket.on('packet', this.createPacketListener(socket));
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socket.on('disconnect', this.createDisconnectionListener(socket));
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}
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createDisconnectionListener(socket) {
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const {entity} = socket;
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return () => {
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if (entity.is('existent')) {
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entity.destroy();
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}
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};
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}
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createMainLoop() {
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let lastTime = performance.now();
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return () => {
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const now = performance.now();
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const elapsed = (now - lastTime) / 1000;
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lastTime = now;
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// Tick synchronized.
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if (this.room) {
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this.room.tick(elapsed);
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}
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this.worldTime.tick(elapsed);
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// Tick informer.
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this.informTicker.tick(elapsed);
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}
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}
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createPacketListener(socket) {
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const {entity} = socket;
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return (packet) => {
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if (packet instanceof InputPacket) {
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entity.inputState = packet.toState();
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}
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};
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}
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inform() {
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const packets = this.synchronizer.packetsForUpdate();
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// Inform entities of the new state.
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for (let i = 0; i < this.informables.length; ++i) {
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const entity = this.informables[i];
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entity.inform(packets);
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}
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}
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readConfig() {
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return {
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informInterval: 1 / 60,
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simulationInterval: 1 / 60,
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};
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}
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}
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