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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>
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