You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
354 lines
9.5 KiB
354 lines
9.5 KiB
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<title>three.js webgl - geometry - spline extrusion</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">
|
|
<style>
|
|
body {
|
|
background-color: #f0f0f0;
|
|
color: #444;
|
|
}
|
|
a {
|
|
color: #08f;
|
|
}
|
|
</style>
|
|
</head>
|
|
<body>
|
|
|
|
<div id="container"></div>
|
|
<div id="info">
|
|
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - spline extrusion examples
|
|
</div>
|
|
|
|
<!-- Import maps polyfill -->
|
|
<!-- Remove this when import maps will be widely supported -->
|
|
<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
|
|
|
|
<script type="importmap">
|
|
{
|
|
"imports": {
|
|
"three": "../build/three.module.js",
|
|
"three/addons/": "./jsm/"
|
|
}
|
|
}
|
|
</script>
|
|
|
|
<script type="module">
|
|
|
|
import * as THREE from 'three';
|
|
|
|
import Stats from 'three/addons/libs/stats.module.js';
|
|
import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
|
|
|
|
import * as Curves from 'three/addons/curves/CurveExtras.js';
|
|
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
|
|
|
|
let container, stats;
|
|
|
|
let camera, scene, renderer, splineCamera, cameraHelper, cameraEye;
|
|
|
|
const direction = new THREE.Vector3();
|
|
const binormal = new THREE.Vector3();
|
|
const normal = new THREE.Vector3();
|
|
const position = new THREE.Vector3();
|
|
const lookAt = new THREE.Vector3();
|
|
|
|
const pipeSpline = new THREE.CatmullRomCurve3( [
|
|
new THREE.Vector3( 0, 10, - 10 ), new THREE.Vector3( 10, 0, - 10 ),
|
|
new THREE.Vector3( 20, 0, 0 ), new THREE.Vector3( 30, 0, 10 ),
|
|
new THREE.Vector3( 30, 0, 20 ), new THREE.Vector3( 20, 0, 30 ),
|
|
new THREE.Vector3( 10, 0, 30 ), new THREE.Vector3( 0, 0, 30 ),
|
|
new THREE.Vector3( - 10, 10, 30 ), new THREE.Vector3( - 10, 20, 30 ),
|
|
new THREE.Vector3( 0, 30, 30 ), new THREE.Vector3( 10, 30, 30 ),
|
|
new THREE.Vector3( 20, 30, 15 ), new THREE.Vector3( 10, 30, 10 ),
|
|
new THREE.Vector3( 0, 30, 10 ), new THREE.Vector3( - 10, 20, 10 ),
|
|
new THREE.Vector3( - 10, 10, 10 ), new THREE.Vector3( 0, 0, 10 ),
|
|
new THREE.Vector3( 10, - 10, 10 ), new THREE.Vector3( 20, - 15, 10 ),
|
|
new THREE.Vector3( 30, - 15, 10 ), new THREE.Vector3( 40, - 15, 10 ),
|
|
new THREE.Vector3( 50, - 15, 10 ), new THREE.Vector3( 60, 0, 10 ),
|
|
new THREE.Vector3( 70, 0, 0 ), new THREE.Vector3( 80, 0, 0 ),
|
|
new THREE.Vector3( 90, 0, 0 ), new THREE.Vector3( 100, 0, 0 )
|
|
] );
|
|
|
|
const sampleClosedSpline = new THREE.CatmullRomCurve3( [
|
|
new THREE.Vector3( 0, - 40, - 40 ),
|
|
new THREE.Vector3( 0, 40, - 40 ),
|
|
new THREE.Vector3( 0, 140, - 40 ),
|
|
new THREE.Vector3( 0, 40, 40 ),
|
|
new THREE.Vector3( 0, - 40, 40 )
|
|
] );
|
|
|
|
sampleClosedSpline.curveType = 'catmullrom';
|
|
sampleClosedSpline.closed = true;
|
|
|
|
// Keep a dictionary of Curve instances
|
|
const splines = {
|
|
GrannyKnot: new Curves.GrannyKnot(),
|
|
HeartCurve: new Curves.HeartCurve( 3.5 ),
|
|
VivianiCurve: new Curves.VivianiCurve( 70 ),
|
|
KnotCurve: new Curves.KnotCurve(),
|
|
HelixCurve: new Curves.HelixCurve(),
|
|
TrefoilKnot: new Curves.TrefoilKnot(),
|
|
TorusKnot: new Curves.TorusKnot( 20 ),
|
|
CinquefoilKnot: new Curves.CinquefoilKnot( 20 ),
|
|
TrefoilPolynomialKnot: new Curves.TrefoilPolynomialKnot( 14 ),
|
|
FigureEightPolynomialKnot: new Curves.FigureEightPolynomialKnot(),
|
|
DecoratedTorusKnot4a: new Curves.DecoratedTorusKnot4a(),
|
|
DecoratedTorusKnot4b: new Curves.DecoratedTorusKnot4b(),
|
|
DecoratedTorusKnot5a: new Curves.DecoratedTorusKnot5a(),
|
|
DecoratedTorusKnot5c: new Curves.DecoratedTorusKnot5c(),
|
|
PipeSpline: pipeSpline,
|
|
SampleClosedSpline: sampleClosedSpline
|
|
};
|
|
|
|
let parent, tubeGeometry, mesh;
|
|
|
|
const params = {
|
|
spline: 'GrannyKnot',
|
|
scale: 4,
|
|
extrusionSegments: 100,
|
|
radiusSegments: 3,
|
|
closed: true,
|
|
animationView: false,
|
|
lookAhead: false,
|
|
cameraHelper: false,
|
|
};
|
|
|
|
const material = new THREE.MeshLambertMaterial( { color: 0xff00ff } );
|
|
|
|
const wireframeMaterial = new THREE.MeshBasicMaterial( { color: 0x000000, opacity: 0.3, wireframe: true, transparent: true } );
|
|
|
|
function addTube() {
|
|
|
|
if ( mesh !== undefined ) {
|
|
|
|
parent.remove( mesh );
|
|
mesh.geometry.dispose();
|
|
|
|
}
|
|
|
|
const extrudePath = splines[ params.spline ];
|
|
|
|
tubeGeometry = new THREE.TubeGeometry( extrudePath, params.extrusionSegments, 2, params.radiusSegments, params.closed );
|
|
|
|
addGeometry( tubeGeometry );
|
|
|
|
setScale();
|
|
|
|
}
|
|
|
|
function setScale() {
|
|
|
|
mesh.scale.set( params.scale, params.scale, params.scale );
|
|
|
|
}
|
|
|
|
|
|
function addGeometry( geometry ) {
|
|
|
|
// 3D shape
|
|
|
|
mesh = new THREE.Mesh( geometry, material );
|
|
const wireframe = new THREE.Mesh( geometry, wireframeMaterial );
|
|
mesh.add( wireframe );
|
|
|
|
parent.add( mesh );
|
|
|
|
}
|
|
|
|
function animateCamera() {
|
|
|
|
cameraHelper.visible = params.cameraHelper;
|
|
cameraEye.visible = params.cameraHelper;
|
|
|
|
}
|
|
|
|
init();
|
|
animate();
|
|
|
|
function init() {
|
|
|
|
container = document.getElementById( 'container' );
|
|
|
|
// camera
|
|
|
|
camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.01, 10000 );
|
|
camera.position.set( 0, 50, 500 );
|
|
|
|
// scene
|
|
|
|
scene = new THREE.Scene();
|
|
scene.background = new THREE.Color( 0xf0f0f0 );
|
|
|
|
// light
|
|
|
|
const light = new THREE.DirectionalLight( 0xffffff );
|
|
light.position.set( 0, 0, 1 );
|
|
scene.add( light );
|
|
|
|
// tube
|
|
|
|
parent = new THREE.Object3D();
|
|
scene.add( parent );
|
|
|
|
splineCamera = new THREE.PerspectiveCamera( 84, window.innerWidth / window.innerHeight, 0.01, 1000 );
|
|
parent.add( splineCamera );
|
|
|
|
cameraHelper = new THREE.CameraHelper( splineCamera );
|
|
scene.add( cameraHelper );
|
|
|
|
addTube();
|
|
|
|
// debug camera
|
|
|
|
cameraEye = new THREE.Mesh( new THREE.SphereGeometry( 5 ), new THREE.MeshBasicMaterial( { color: 0xdddddd } ) );
|
|
parent.add( cameraEye );
|
|
|
|
cameraHelper.visible = params.cameraHelper;
|
|
cameraEye.visible = params.cameraHelper;
|
|
|
|
// renderer
|
|
|
|
renderer = new THREE.WebGLRenderer( { antialias: true } );
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
container.appendChild( renderer.domElement );
|
|
|
|
// stats
|
|
|
|
stats = new Stats();
|
|
container.appendChild( stats.dom );
|
|
|
|
// dat.GUI
|
|
|
|
const gui = new GUI( { width: 285 } );
|
|
|
|
const folderGeometry = gui.addFolder( 'Geometry' );
|
|
folderGeometry.add( params, 'spline', Object.keys( splines ) ).onChange( function () {
|
|
|
|
addTube();
|
|
|
|
} );
|
|
folderGeometry.add( params, 'scale', 2, 10 ).step( 2 ).onChange( function () {
|
|
|
|
setScale();
|
|
|
|
} );
|
|
folderGeometry.add( params, 'extrusionSegments', 50, 500 ).step( 50 ).onChange( function () {
|
|
|
|
addTube();
|
|
|
|
} );
|
|
folderGeometry.add( params, 'radiusSegments', 2, 12 ).step( 1 ).onChange( function () {
|
|
|
|
addTube();
|
|
|
|
} );
|
|
folderGeometry.add( params, 'closed' ).onChange( function () {
|
|
|
|
addTube();
|
|
|
|
} );
|
|
folderGeometry.open();
|
|
|
|
const folderCamera = gui.addFolder( 'Camera' );
|
|
folderCamera.add( params, 'animationView' ).onChange( function () {
|
|
|
|
animateCamera();
|
|
|
|
} );
|
|
folderCamera.add( params, 'lookAhead' ).onChange( function () {
|
|
|
|
animateCamera();
|
|
|
|
} );
|
|
folderCamera.add( params, 'cameraHelper' ).onChange( function () {
|
|
|
|
animateCamera();
|
|
|
|
} );
|
|
folderCamera.open();
|
|
|
|
const controls = new OrbitControls( camera, renderer.domElement );
|
|
controls.minDistance = 100;
|
|
controls.maxDistance = 2000;
|
|
|
|
window.addEventListener( 'resize', onWindowResize );
|
|
|
|
}
|
|
|
|
function onWindowResize() {
|
|
|
|
camera.aspect = window.innerWidth / window.innerHeight;
|
|
camera.updateProjectionMatrix();
|
|
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
|
|
}
|
|
|
|
//
|
|
|
|
function animate() {
|
|
|
|
requestAnimationFrame( animate );
|
|
|
|
render();
|
|
stats.update();
|
|
|
|
}
|
|
|
|
function render() {
|
|
|
|
// animate camera along spline
|
|
|
|
const time = Date.now();
|
|
const looptime = 20 * 1000;
|
|
const t = ( time % looptime ) / looptime;
|
|
|
|
tubeGeometry.parameters.path.getPointAt( t, position );
|
|
position.multiplyScalar( params.scale );
|
|
|
|
// interpolation
|
|
|
|
const segments = tubeGeometry.tangents.length;
|
|
const pickt = t * segments;
|
|
const pick = Math.floor( pickt );
|
|
const pickNext = ( pick + 1 ) % segments;
|
|
|
|
binormal.subVectors( tubeGeometry.binormals[ pickNext ], tubeGeometry.binormals[ pick ] );
|
|
binormal.multiplyScalar( pickt - pick ).add( tubeGeometry.binormals[ pick ] );
|
|
|
|
tubeGeometry.parameters.path.getTangentAt( t, direction );
|
|
const offset = 15;
|
|
|
|
normal.copy( binormal ).cross( direction );
|
|
|
|
// we move on a offset on its binormal
|
|
|
|
position.add( normal.clone().multiplyScalar( offset ) );
|
|
|
|
splineCamera.position.copy( position );
|
|
cameraEye.position.copy( position );
|
|
|
|
// using arclength for stablization in look ahead
|
|
|
|
tubeGeometry.parameters.path.getPointAt( ( t + 30 / tubeGeometry.parameters.path.getLength() ) % 1, lookAt );
|
|
lookAt.multiplyScalar( params.scale );
|
|
|
|
// camera orientation 2 - up orientation via normal
|
|
|
|
if ( ! params.lookAhead ) lookAt.copy( position ).add( direction );
|
|
splineCamera.matrix.lookAt( splineCamera.position, lookAt, normal );
|
|
splineCamera.quaternion.setFromRotationMatrix( splineCamera.matrix );
|
|
|
|
cameraHelper.update();
|
|
|
|
renderer.render( scene, params.animationView === true ? splineCamera : camera );
|
|
|
|
}
|
|
|
|
</script>
|
|
</body>
|
|
</html>
|
|
|