
	} );
	const fov = 45;
	const aspect = 2; // the canvas default
	const near = 0.00001;
	const far = 100;
	const camera = new THREE.PerspectiveCamera( fov, aspect, near, far );
	camera.position.set( 10, 6, 10 );

	class MinMaxGUIHelper {

		constructor( obj, minProp, maxProp, minDif ) {

			this.obj = obj;
			this.minProp = minProp;
			this.maxProp = maxProp;
			this.minDif = minDif;

		}
		get min() {

			return this.obj[ this.minProp ];

		}
		set min( v ) {

			this.obj[ this.minProp ] = v;
			this.obj[ 