106 lines
3.7 KiB
JavaScript
106 lines
3.7 KiB
JavaScript
import { BaseEntity } from './entity';
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import { EventBus } from '../event-bus';
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import { Query } from './query';
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import { System } from './system';
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export class World {
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constructor() {
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this.nextEntityID = 0;
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this.nextComponentID = 0;
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this.nextQueryID = 0;
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this.entities = new Array();
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this.systems = new Set();
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this.components = new Map();
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this.componentNamesToIDs = new Map();
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this.queryCache = new Array();
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this.eventBus = new EventBus();
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}
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run() {
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this.systems.forEach((system) => {
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system.execute(this);
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});
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}
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createSystem(systemExecutor) {
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const newSystem = new System(systemExecutor);
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this.systems.add(newSystem);
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}
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addSystem(system) {
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this.systems.add(system);
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}
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addEntity(entity) {
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this.entities.push(entity);
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this.markQueriesDirty();
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}
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removeEntity(entityToRemove) {
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this.entities = this.entities.filter((entity) => entity !== entityToRemove);
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this.markQueriesDirty();
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}
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createEntity(components) {
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const newEntity = new BaseEntity();
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newEntity.id = this.nextEntityID;
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this.nextEntityID++;
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components.forEach((component) => {
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if (this.componentNamesToIDs.has(component.name)) {
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component.id = this.componentNamesToIDs.get(component.name);
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}
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else {
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this.componentNamesToIDs.set(component.name, this.nextComponentID);
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component.id = this.nextComponentID;
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this.nextComponentID++;
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}
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newEntity.addComponent(component);
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});
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this.entities.push(newEntity);
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this.markQueriesDirty();
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return newEntity;
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}
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extendEntity(entity, components) {
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const toClone = this.entities.find((found) => entity.name === found.constructor.name);
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const cloned = new BaseEntity();
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cloned.id = this.nextEntityID;
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this.nextEntityID++;
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toClone.components.forEach((component) => {
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cloned.addComponent(this.components.get(component.id));
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});
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components.forEach((component) => {
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if (this.componentNamesToIDs.has(component.name)) {
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component.id = this.componentNamesToIDs.get(component.name);
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}
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else {
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this.componentNamesToIDs.set(component.name, this.nextComponentID);
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component.id = this.nextComponentID;
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this.nextComponentID++;
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}
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cloned.addComponent(component);
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});
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this.entities.push(cloned);
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return cloned;
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}
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createComponent(component) {
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const newComponent = component;
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newComponent.id = this.nextComponentID;
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this.nextComponentID++;
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this.components.set(newComponent.id, newComponent);
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this.componentNamesToIDs.set(component.name, component.id);
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return newComponent;
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}
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query(include, exclude) {
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const query = new Query(include, exclude, this);
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const cache = this.queryCache.find((item) => item.include == include && item.exclude == exclude);
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if (cache) {
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return cache.execute();
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}
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this.queryCache.push(query);
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return query.execute();
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}
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createQuery(include, exclude) {
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const newQuery = new Query(include, exclude, this);
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newQuery.id = this.nextQueryID;
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this.nextQueryID++;
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this.queryCache.push(newQuery);
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return newQuery;
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}
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markQueriesDirty() {
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this.queryCache.forEach((query) => (query.isDirty = true));
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}
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}
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