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three.js
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							<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js webgl - exporter - obj</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="main.css">
	</head>
	<body>
		<div id="info">
			<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - exporter - obj
		</div>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.module.js",
					"three/addons/": "./jsm/"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three';

			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
			import { OBJExporter } from 'three/addons/exporters/OBJExporter.js';
			import { GUI } from 'three/addons/libs/lil-gui.module.min.js';

			let camera, scene, renderer;

			const params = {
				addTriangle: addTriangle,
				addCube: addCube,
				addCylinder: addCylinder,
				addMultiple: addMultiple,
				addTransformed: addTransformed,
				addPoints: addPoints,
				exportToObj: exportToObj
			};

			init();

			function init() {

				renderer = new THREE.WebGLRenderer( { antialias: true } );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.setAnimationLoop( animate );
				document.body.appendChild( renderer.domElement );

				camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 1000 );
				camera.position.set( 0, 0, 400 );

				scene = new THREE.Scene();

				const ambientLight = new THREE.AmbientLight( 0xffffff );
				scene.add( ambientLight );

				const directionalLight = new THREE.DirectionalLight( 0xffffff, 2.5 );
				directionalLight.position.set( 0, 1, 1 );
				scene.add( directionalLight );

				const gui = new GUI();

				let h = gui.addFolder( 'Geometry Selection' );
				h.add( params, 'addTriangle' ).name( 'Triangle' );
				h.add( params, 'addCube' ).name( 'Cube' );
				h.add( params, 'addCylinder' ).name( 'Cylinder' );
				h.add( params, 'addMultiple' ).name( 'Multiple objects' );
				h.add( params, 'addTransformed' ).name( 'Transformed objects' );
				h.add( params, 'addPoints' ).name( 'Point Cloud' );

				h = gui.addFolder( 'Export' );
				h.add( params, 'exportToObj' ).name( 'Export OBJ' );

				gui.open();

				addGeometry( 1 );

				window.addEventListener( 'resize', onWindowResize );

				const controls = new OrbitControls( camera, renderer.domElement );
				controls.enablePan = false;

			}

			function exportToObj() {

				const exporter = new OBJExporter();
				const result = exporter.parse( scene );
				saveString( result, 'object.obj' );

			}

			function addGeometry( type ) {

				for ( let i = 0; i < scene.children.length; i ++ ) {

					const child = scene.children[ i ];

					if ( child.isMesh || child.isPoints ) {

						child.geometry.dispose();
						scene.remove( child );
						i --;

					}

				}

				if ( type === 1 ) {

					const material = new THREE.MeshLambertMaterial( { color: 0x00cc00 } );
					const geometry = generateTriangleGeometry();

					scene.add( new THREE.Mesh( geometry, material ) );


				} else if ( type === 2 ) {

					const material = new THREE.MeshLambertMaterial( { color: 0x00cc00 } );
					const geometry = new THREE.BoxGeometry( 100, 100, 100 );
					scene.add( new THREE.Mesh( geometry, material ) );

				} else if ( type === 3 ) {

					const material = new THREE.MeshLambertMaterial( { color: 0x00cc00 } );
					const geometry = new THREE.CylinderGeometry( 50, 50, 100, 30, 1 );
					scene.add( new THREE.Mesh( geometry, material ) );

				} else if ( type === 4 || type === 5 ) {

					const material = new THREE.MeshLambertMaterial( { color: 0x00cc00 } );
					const geometry = generateTriangleGeometry();

					const mesh = new THREE.Mesh( geometry, material );
					mesh.position.x = - 200;
					scene.add( mesh );

					const geometry2 = new THREE.BoxGeometry( 100, 100, 100 );
					const mesh2 = new THREE.Mesh( geometry2, material );
					scene.add( mesh2 );

					const geometry3 = new THREE.CylinderGeometry( 50, 50, 100, 30, 1 );
					const mesh3 = new THREE.Mesh( geometry3, material );
					mesh3.position.x = 200;
					scene.add( mesh3 );

					if ( type === 5 ) {

						mesh.rotation.y = Math.PI / 4.0;
						mesh2.rotation.y = Math.PI / 4.0;
						mesh3.rotation.y = Math.PI / 4.0;

					}

				} else if ( type === 6 ) {

					const points = [ 0, 0, 0, 100, 0, 0, 100, 100, 0, 0, 100, 0 ];
					const colors = [ 0.5, 0, 0, 0.5, 0, 0, 0, 0.5, 0, 0, 0.5, 0 ];

					const geometry = new THREE.BufferGeometry();
					geometry.setAttribute( 'position', new THREE.Float32BufferAttribute( points, 3 ) );
					geometry.setAttribute( 'color', new THREE.Float32BufferAttribute( colors, 3 ) );

					const material = new THREE.PointsMaterial( { size: 10, vertexColors: true } );

					const pointCloud = new THREE.Points( geometry, material );
					pointCloud.name = 'point cloud';
					scene.add( pointCloud );

				}

			}

			function addTriangle() {

				addGeometry( 1 );

			}

			function addCube() {

				addGeometry( 2 );

			}

			function addCylinder() {

				addGeometry( 3 );

			}

			function addMultiple() {

				addGeometry( 4 );

			}

			function addTransformed() {

				addGeometry( 5 );

			}

			function addPoints() {

				addGeometry( 6 );

			}

			const link = document.createElement( 'a' );
			link.style.display = 'none';
			document.body.appendChild( link );

			function save( blob, filename ) {

				link.href = URL.createObjectURL( blob );
				link.download = filename;
				link.click();

			}

			function saveString( text, filename ) {

				save( new Blob( [ text ], { type: 'text/plain' } ), filename );

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

			}

			function animate() {

				renderer.render( scene, camera );

			}

			function generateTriangleGeometry() {

				const geometry = new THREE.BufferGeometry();
				const vertices = [];

				vertices.push( - 50, - 50, 0 );
				vertices.push( 50, - 50, 0 );
				vertices.push( 50, 50, 0 );

				geometry.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );
				geometry.computeVertexNormals();

				return geometry;

			}

		</script>

	</body>
</html>