three.js/src/scenes/Scene.js

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

function Scene() {

	Object3D.call( this );

	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 } ) ); // eslint-disable-line no-undef

	}

}

Scene.prototype = Object.assign( Object.create( Object3D.prototype ), {

	constructor: Scene,

	isScene: true,

	copy: function ( source, recursive ) {

		Object3D.prototype.copy.call( this, 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: function ( meta ) {

		const data = Object3D.prototype.toJSON.call( this, meta );

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

		return data;

	}

} );



export { Scene };