three.js/editor/js/Viewport.Camera.js

/**
 * @author mrdoob / http://mrdoob.com/
 */

Viewport.Camera = function ( editor ) {

	var signals = editor.signals;

	//

	var cameraSelect = new UI.Select();
	cameraSelect.setPosition( 'absolute' );
	cameraSelect.setRight( '10px' );
	cameraSelect.setTop( '10px' );
	cameraSelect.onChange( function () {

		editor.setViewportCamera( this.getValue() );

	} );

	signals.cameraAdded.add( update );
	signals.cameraRemoved.add( update );

	update();

	//

	function update() {

		var options = {};

		var cameras = editor.cameras;

		for ( var key in cameras ) {

			var camera = cameras[ key ];
			options[ camera.uuid ] = camera.name;

		}

		cameraSelect.setOptions( options );
		cameraSelect.setValue( editor.viewportCamera.uuid );

	}

	return cameraSelect;

};