const _scale = new THREE.Vector3( 1, 1, 1 );
			const _matrix = new THREE.Matrix4();
			const _axis = new THREE.Vector3();
			const MAX_RAYS = 3000;
			const RAY_COLOR = 0x444444;

			const params = {

				count: 150,
				firstHitOnly: true,
				useBVH: true,

				displayHelper: false,
				helperDepth: 10,

			};

			init();

			function init() {

				// environment
				camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 1, 100 );
				camera.position.z = 10;

				scene = new TH