2d-physics-engine/dist/core/Scene.js

A lightweight, flexible 2D physics engine with ECS architecture, built with TypeScript

export class Scene {
    constructor() {
        Object.defineProperty(this, "entities", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: new Set()
        });
        Object.defineProperty(this, "entityCache", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: null
        });
    }
    addEntity(entity) {
        this.entities.add(entity);
        this.entityCache = null; // Invalidate cache
    }
    removeEntity(entity) {
        this.entities.delete(entity);
        this.entityCache = null; // Invalidate cache
    }
    getEntities() {
        // Cache entities array to avoid recreating it every frame
        if (!this.entityCache) {
            this.entityCache = Array.from(this.entities);
        }
        return this.entityCache;
    }
    update(deltaTime) {
        for (const entity of this.entities) {
            entity.update(deltaTime);
        }
    }
    onLoad() {
        // Initialize scene resources
    }
    onUnload() {
        // Cleanup scene resources
        for (const entity of this.entities) {
            entity.destroy();
        }
        this.entities.clear();
        this.entityCache = null;
    }
}
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