backend/libs/three/scenes/Scene.js

import { Object3D } from '../core/Object3D.js';

class Scene extends Object3D {
	constructor() {
		super();

		this.type = 'Scene';

		this.background = null;
		this.environment = null;
		this.fog = null;

		this.overrideMaterial = null;

		this.autoUpdate = true; // checked by the renderer

		if (typeof __THREE_DEVTOOLS__ !== 'undefined') {
			__THREE_DEVTOOLS__.dispatchEvent(new CustomEvent('observe', { detail: this }));
		}
	}

	copy(source, recursive) {
		super.copy(source, recursive);

		if (source.background !== null) this.background = source.background.clone();
		if (source.environment !== null) this.environment = source.environment.clone();
		if (source.fog !== null) this.fog = source.fog.clone();

		if (source.overrideMaterial !== null) this.overrideMaterial = source.overrideMaterial.clone();

		this.autoUpdate = source.autoUpdate;
		this.matrixAutoUpdate = source.matrixAutoUpdate;

		return this;
	}

	toJSON(meta) {
		const data = super.toJSON(meta);

		if (this.fog !== null) data.object.fog = this.fog.toJSON();

		return data;
	}
}

Scene.prototype.isScene = true;

export { Scene };