// SceneFeatureManager.js class SceneFeatureManager { constructor() { if (SceneFeatureManager.instance) { return SceneFeatureManager.instance; } this.features = []; SceneFeatureManager.instance = this; } register(feature) { this.features.push(feature); } init() { for (const feature of this.features) { feature.init(); } } update(deltaTime) { for (const feature of this.features) { feature.update(deltaTime); } } } const sceneFeatureManager = new SceneFeatureManager(); export default sceneFeatureManager;