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274 lines
6.5 KiB
274 lines
6.5 KiB
2 years ago
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgl - exporter - obj</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<link type="text/css" rel="stylesheet" href="main.css">
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</head>
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<body>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - exporter - obj
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</div>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../build/three.module.js",
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"three/addons/": "./jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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import { OBJExporter } from 'three/addons/exporters/OBJExporter.js';
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import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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let camera, scene, renderer;
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const params = {
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addTriangle: addTriangle,
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addCube: addCube,
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addCylinder: addCylinder,
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addMultiple: addMultiple,
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addTransformed: addTransformed,
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addPoints: addPoints,
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exportToObj: exportToObj
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};
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init();
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animate();
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function init() {
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renderer = new THREE.WebGLRenderer();
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renderer.outputEncoding = THREE.sRGBEncoding;
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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document.body.appendChild( renderer.domElement );
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camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 1000 );
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camera.position.set( 0, 0, 400 );
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scene = new THREE.Scene();
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const ambientLight = new THREE.AmbientLight( 0xcccccc, 0.4 );
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scene.add( ambientLight );
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const directionalLight = new THREE.DirectionalLight( 0xffffff, 0.8 );
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directionalLight.position.set( 0, 1, 1 );
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scene.add( directionalLight );
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const gui = new GUI();
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let h = gui.addFolder( 'Geometry Selection' );
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h.add( params, 'addTriangle' ).name( 'Triangle' );
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h.add( params, 'addCube' ).name( 'Cube' );
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h.add( params, 'addCylinder' ).name( 'Cylinder' );
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h.add( params, 'addMultiple' ).name( 'Multiple objects' );
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h.add( params, 'addTransformed' ).name( 'Transformed objects' );
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h.add( params, 'addPoints' ).name( 'Point Cloud' );
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h = gui.addFolder( 'Export' );
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h.add( params, 'exportToObj' ).name( 'Export OBJ' );
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gui.open();
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addGeometry( 1 );
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window.addEventListener( 'resize', onWindowResize );
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const controls = new OrbitControls( camera, renderer.domElement );
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controls.enablePan = false;
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}
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function exportToObj() {
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const exporter = new OBJExporter();
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const result = exporter.parse( scene );
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saveString( result, 'object.obj' );
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}
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function addGeometry( type ) {
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for ( let i = 0; i < scene.children.length; i ++ ) {
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const child = scene.children[ i ];
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if ( child.isMesh || child.isPoints ) {
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child.geometry.dispose();
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scene.remove( child );
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i --;
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}
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}
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if ( type === 1 ) {
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const material = new THREE.MeshLambertMaterial( { color: 0x00cc00 } );
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const geometry = generateTriangleGeometry();
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scene.add( new THREE.Mesh( geometry, material ) );
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} else if ( type === 2 ) {
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const material = new THREE.MeshLambertMaterial( { color: 0x00cc00 } );
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const geometry = new THREE.BoxGeometry( 100, 100, 100 );
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scene.add( new THREE.Mesh( geometry, material ) );
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} else if ( type === 3 ) {
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const material = new THREE.MeshLambertMaterial( { color: 0x00cc00 } );
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const geometry = new THREE.CylinderGeometry( 50, 50, 100, 30, 1 );
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scene.add( new THREE.Mesh( geometry, material ) );
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} else if ( type === 4 || type === 5 ) {
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const material = new THREE.MeshLambertMaterial( { color: 0x00cc00 } );
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const geometry = generateTriangleGeometry();
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const mesh = new THREE.Mesh( geometry, material );
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mesh.position.x = - 200;
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scene.add( mesh );
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const geometry2 = new THREE.BoxGeometry( 100, 100, 100 );
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const mesh2 = new THREE.Mesh( geometry2, material );
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scene.add( mesh2 );
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const geometry3 = new THREE.CylinderGeometry( 50, 50, 100, 30, 1 );
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const mesh3 = new THREE.Mesh( geometry3, material );
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mesh3.position.x = 200;
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scene.add( mesh3 );
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if ( type === 5 ) {
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mesh.rotation.y = Math.PI / 4.0;
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mesh2.rotation.y = Math.PI / 4.0;
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mesh3.rotation.y = Math.PI / 4.0;
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}
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} else if ( type === 6 ) {
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const points = [ 0, 0, 0, 100, 0, 0, 100, 100, 0, 0, 100, 0 ];
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const colors = [ 0.5, 0, 0, 0.5, 0, 0, 0, 0.5, 0, 0, 0.5, 0 ];
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const geometry = new THREE.BufferGeometry();
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geometry.setAttribute( 'position', new THREE.Float32BufferAttribute( points, 3 ) );
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geometry.setAttribute( 'color', new THREE.Float32BufferAttribute( colors, 3 ) );
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const material = new THREE.PointsMaterial( { size: 10, vertexColors: true } );
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const pointCloud = new THREE.Points( geometry, material );
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pointCloud.name = 'point cloud';
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scene.add( pointCloud );
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}
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}
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function addTriangle() {
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addGeometry( 1 );
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}
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function addCube() {
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addGeometry( 2 );
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}
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function addCylinder() {
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addGeometry( 3 );
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}
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function addMultiple() {
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addGeometry( 4 );
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}
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function addTransformed() {
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addGeometry( 5 );
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}
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function addPoints() {
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addGeometry( 6 );
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}
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const link = document.createElement( 'a' );
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link.style.display = 'none';
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document.body.appendChild( link );
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function save( blob, filename ) {
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link.href = URL.createObjectURL( blob );
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link.download = filename;
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link.click();
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}
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function saveString( text, filename ) {
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save( new Blob( [ text ], { type: 'text/plain' } ), filename );
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}
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function onWindowResize() {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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function animate() {
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requestAnimationFrame( animate );
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renderer.render( scene, camera );
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}
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function generateTriangleGeometry() {
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const geometry = new THREE.BufferGeometry();
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const vertices = [];
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vertices.push( - 50, - 50, 0 );
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vertices.push( 50, - 50, 0 );
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vertices.push( 50, 50, 0 );
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geometry.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );
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geometry.computeVertexNormals();
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return geometry;
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}
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</script>
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</body>
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</html>
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