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351 lines
9.3 KiB
HTML
351 lines
9.3 KiB
HTML
2 months 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 - geometry - spline extrusion</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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<style>
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body {
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background-color: #f0f0f0;
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color: #444;
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}
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a {
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color: #08f;
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}
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</style>
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</head>
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<body>
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<div id="container"></div>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - spline extrusion examples
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</div>
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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 Stats from 'three/addons/libs/stats.module.js';
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import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
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import * as Curves from 'three/addons/curves/CurveExtras.js';
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import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
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let container, stats;
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let camera, scene, renderer, splineCamera, cameraHelper, cameraEye;
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const direction = new THREE.Vector3();
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const binormal = new THREE.Vector3();
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const normal = new THREE.Vector3();
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const position = new THREE.Vector3();
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const lookAt = new THREE.Vector3();
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const pipeSpline = new THREE.CatmullRomCurve3( [
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new THREE.Vector3( 0, 10, - 10 ), new THREE.Vector3( 10, 0, - 10 ),
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new THREE.Vector3( 20, 0, 0 ), new THREE.Vector3( 30, 0, 10 ),
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new THREE.Vector3( 30, 0, 20 ), new THREE.Vector3( 20, 0, 30 ),
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new THREE.Vector3( 10, 0, 30 ), new THREE.Vector3( 0, 0, 30 ),
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new THREE.Vector3( - 10, 10, 30 ), new THREE.Vector3( - 10, 20, 30 ),
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new THREE.Vector3( 0, 30, 30 ), new THREE.Vector3( 10, 30, 30 ),
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new THREE.Vector3( 20, 30, 15 ), new THREE.Vector3( 10, 30, 10 ),
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new THREE.Vector3( 0, 30, 10 ), new THREE.Vector3( - 10, 20, 10 ),
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new THREE.Vector3( - 10, 10, 10 ), new THREE.Vector3( 0, 0, 10 ),
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new THREE.Vector3( 10, - 10, 10 ), new THREE.Vector3( 20, - 15, 10 ),
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new THREE.Vector3( 30, - 15, 10 ), new THREE.Vector3( 40, - 15, 10 ),
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new THREE.Vector3( 50, - 15, 10 ), new THREE.Vector3( 60, 0, 10 ),
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new THREE.Vector3( 70, 0, 0 ), new THREE.Vector3( 80, 0, 0 ),
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new THREE.Vector3( 90, 0, 0 ), new THREE.Vector3( 100, 0, 0 )
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] );
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const sampleClosedSpline = new THREE.CatmullRomCurve3( [
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new THREE.Vector3( 0, - 40, - 40 ),
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new THREE.Vector3( 0, 40, - 40 ),
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new THREE.Vector3( 0, 140, - 40 ),
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new THREE.Vector3( 0, 40, 40 ),
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new THREE.Vector3( 0, - 40, 40 )
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] );
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sampleClosedSpline.curveType = 'catmullrom';
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sampleClosedSpline.closed = true;
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// Keep a dictionary of Curve instances
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const splines = {
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GrannyKnot: new Curves.GrannyKnot(),
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HeartCurve: new Curves.HeartCurve( 3.5 ),
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VivianiCurve: new Curves.VivianiCurve( 70 ),
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KnotCurve: new Curves.KnotCurve(),
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HelixCurve: new Curves.HelixCurve(),
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TrefoilKnot: new Curves.TrefoilKnot(),
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TorusKnot: new Curves.TorusKnot( 20 ),
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CinquefoilKnot: new Curves.CinquefoilKnot( 20 ),
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TrefoilPolynomialKnot: new Curves.TrefoilPolynomialKnot( 14 ),
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FigureEightPolynomialKnot: new Curves.FigureEightPolynomialKnot(),
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DecoratedTorusKnot4a: new Curves.DecoratedTorusKnot4a(),
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DecoratedTorusKnot4b: new Curves.DecoratedTorusKnot4b(),
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DecoratedTorusKnot5a: new Curves.DecoratedTorusKnot5a(),
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DecoratedTorusKnot5c: new Curves.DecoratedTorusKnot5c(),
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PipeSpline: pipeSpline,
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SampleClosedSpline: sampleClosedSpline
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};
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let parent, tubeGeometry, mesh;
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const params = {
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spline: 'GrannyKnot',
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scale: 4,
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extrusionSegments: 100,
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radiusSegments: 3,
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closed: true,
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animationView: false,
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lookAhead: false,
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cameraHelper: false,
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};
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const material = new THREE.MeshLambertMaterial( { color: 0xff00ff } );
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const wireframeMaterial = new THREE.MeshBasicMaterial( { color: 0x000000, opacity: 0.3, wireframe: true, transparent: true } );
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function addTube() {
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if ( mesh !== undefined ) {
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parent.remove( mesh );
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mesh.geometry.dispose();
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}
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const extrudePath = splines[ params.spline ];
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tubeGeometry = new THREE.TubeGeometry( extrudePath, params.extrusionSegments, 2, params.radiusSegments, params.closed );
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addGeometry( tubeGeometry );
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setScale();
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}
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function setScale() {
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mesh.scale.set( params.scale, params.scale, params.scale );
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}
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function addGeometry( geometry ) {
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// 3D shape
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mesh = new THREE.Mesh( geometry, material );
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const wireframe = new THREE.Mesh( geometry, wireframeMaterial );
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mesh.add( wireframe );
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parent.add( mesh );
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}
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function animateCamera() {
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cameraHelper.visible = params.cameraHelper;
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cameraEye.visible = params.cameraHelper;
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}
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init();
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function init() {
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container = document.getElementById( 'container' );
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// camera
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camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.01, 10000 );
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camera.position.set( 0, 50, 500 );
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// scene
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scene = new THREE.Scene();
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scene.background = new THREE.Color( 0xf0f0f0 );
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// light
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scene.add( new THREE.AmbientLight( 0xffffff ) );
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const light = new THREE.DirectionalLight( 0xffffff, 1.5 );
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light.position.set( 0, 0, 1 );
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scene.add( light );
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// tube
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parent = new THREE.Object3D();
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scene.add( parent );
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splineCamera = new THREE.PerspectiveCamera( 84, window.innerWidth / window.innerHeight, 0.01, 1000 );
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parent.add( splineCamera );
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cameraHelper = new THREE.CameraHelper( splineCamera );
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scene.add( cameraHelper );
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addTube();
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// debug camera
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cameraEye = new THREE.Mesh( new THREE.SphereGeometry( 5 ), new THREE.MeshBasicMaterial( { color: 0xdddddd } ) );
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parent.add( cameraEye );
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cameraHelper.visible = params.cameraHelper;
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cameraEye.visible = params.cameraHelper;
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// renderer
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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renderer.setAnimationLoop( animate );
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container.appendChild( renderer.domElement );
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// stats
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stats = new Stats();
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container.appendChild( stats.dom );
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// dat.GUI
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const gui = new GUI( { width: 285 } );
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const folderGeometry = gui.addFolder( 'Geometry' );
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folderGeometry.add( params, 'spline', Object.keys( splines ) ).onChange( function () {
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addTube();
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} );
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folderGeometry.add( params, 'scale', 2, 10 ).step( 2 ).onChange( function () {
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setScale();
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} );
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folderGeometry.add( params, 'extrusionSegments', 50, 500 ).step( 50 ).onChange( function () {
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addTube();
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} );
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folderGeometry.add( params, 'radiusSegments', 2, 12 ).step( 1 ).onChange( function () {
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addTube();
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} );
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folderGeometry.add( params, 'closed' ).onChange( function () {
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addTube();
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} );
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folderGeometry.open();
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const folderCamera = gui.addFolder( 'Camera' );
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folderCamera.add( params, 'animationView' ).onChange( function () {
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animateCamera();
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} );
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folderCamera.add( params, 'lookAhead' ).onChange( function () {
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animateCamera();
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} );
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folderCamera.add( params, 'cameraHelper' ).onChange( function () {
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animateCamera();
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} );
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folderCamera.open();
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const controls = new OrbitControls( camera, renderer.domElement );
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controls.minDistance = 100;
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controls.maxDistance = 2000;
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window.addEventListener( 'resize', onWindowResize );
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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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//
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function animate() {
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render();
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stats.update();
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}
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function render() {
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// animate camera along spline
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const time = Date.now();
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const looptime = 20 * 1000;
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const t = ( time % looptime ) / looptime;
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tubeGeometry.parameters.path.getPointAt( t, position );
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position.multiplyScalar( params.scale );
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// interpolation
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const segments = tubeGeometry.tangents.length;
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const pickt = t * segments;
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const pick = Math.floor( pickt );
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const pickNext = ( pick + 1 ) % segments;
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binormal.subVectors( tubeGeometry.binormals[ pickNext ], tubeGeometry.binormals[ pick ] );
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binormal.multiplyScalar( pickt - pick ).add( tubeGeometry.binormals[ pick ] );
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tubeGeometry.parameters.path.getTangentAt( t, direction );
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const offset = 15;
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normal.copy( binormal ).cross( direction );
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// we move on a offset on its binormal
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position.add( normal.clone().multiplyScalar( offset ) );
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splineCamera.position.copy( position );
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cameraEye.position.copy( position );
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// using arclength for stabilization in look ahead
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tubeGeometry.parameters.path.getPointAt( ( t + 30 / tubeGeometry.parameters.path.getLength() ) % 1, lookAt );
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lookAt.multiplyScalar( params.scale );
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// camera orientation 2 - up orientation via normal
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if ( ! params.lookAhead ) lookAt.copy( position ).add( direction );
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splineCamera.matrix.lookAt( splineCamera.position, lookAt, normal );
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splineCamera.quaternion.setFromRotationMatrix( splineCamera.matrix );
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cameraHelper.update();
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renderer.render( scene, params.animationView === true ? splineCamera : camera );
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}
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</script>
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</body>
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</html>
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