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@@ -1,175 +0,0 @@
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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 vr - lorenz attractor</title>
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- <meta charset="utf-8">
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- <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
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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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- <script type="module">
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-
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- import * as THREE from '../build/three.module.js';
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- import { VRButton } from './jsm/webxr/VRButton.js';
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-
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- let camera, scene, renderer;
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- let attractor, light;
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-
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- let x = 15 * Math.random();
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- let y = 15 * Math.random();
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- let z = 15 * Math.random();
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-
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- const scale = .02; // for reducing overall displayed size
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- const speed = 5; // integer, increase for faster visualization
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-
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- const steps = 100000;
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- let current = 1;
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- const shown = 10000;
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-
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- const beta = 8 / 3;
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- const rho = 28;
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- const sigma = 10;
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-
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- const dt = .005;
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-
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- init();
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- animate();
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-
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- function draw() {
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-
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- const geometry = attractor.geometry;
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-
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- geometry.attributes.position.array.copyWithin( 3 );
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- geometry.attributes.color.array.copyWithin( 3 );
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-
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- if ( current < steps ) {
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-
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- const dx = sigma * ( y - x ) * dt;
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- const dy = ( x * ( rho - z ) - y ) * dt;
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- const dz = ( x * y - beta * z ) * dt;
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-
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- x += dx;
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- y += dy;
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- z += dz;
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-
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- geometry.attributes.position.set( [ scale * x, scale * y, scale * z ], 0 );
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-
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- light.color.setHSL( current / steps, 1, .5 );
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-
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- geometry.attributes.color.set( light.color.toArray(), 0 );
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-
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- }
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-
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- if ( current < steps + shown ) {
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-
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- current ++;
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-
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- } else {
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-
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- current = 0;
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-
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- }
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-
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- }
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-
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- function init() {
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-
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- scene = new THREE.Scene();
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-
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- camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.1, 10 );
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- camera.position.set( 0, 1.6, 1 );
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-
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- //
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-
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- const geometry = new THREE.BufferGeometry();
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-
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- const positions = new Float32Array( 3 * shown );
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-
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- for ( let i = 0; i < positions.length; i += 3 ) {
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-
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- positions.set( [ scale * x, scale * y, scale * z ], i );
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-
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- }
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-
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- geometry.setAttribute( 'position', new THREE.BufferAttribute( positions, 3 ) );
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-
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- const colors = new Float32Array( 3 * shown );
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-
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- for ( let i = 0; i < positions.length; i += 3 ) {
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-
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- colors.set( [ 1, 0, 0 ], i );
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-
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- }
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-
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- geometry.setAttribute( 'color', new THREE.BufferAttribute( colors, 3 ) );
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-
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- const material = new THREE.LineBasicMaterial( { vertexColors: true } );
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-
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- attractor = new THREE.Line( geometry, material );
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- attractor.position.set( 0, 1.5, - 2 );
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- attractor.frustumCulled = false; // critical to avoid blackouts!
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- scene.add( attractor );
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-
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- //
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-
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- light = new THREE.PointLight( 0xffffff, 1 );
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- light.distance = 2;
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- attractor.add( light );
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-
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- const ground = new THREE.Mesh(
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- new THREE.PlaneGeometry( 10, 10 ),
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- new THREE.MeshPhongMaterial()
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- );
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- ground.geometry.rotateX( - 90 * Math.PI / 180 );
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- scene.add( ground );
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-
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- //
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-
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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.xr.enabled = true;
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- document.body.appendChild( renderer.domElement );
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-
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- document.body.appendChild( VRButton.createButton( renderer ) );
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-
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- //
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-
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- window.addEventListener( 'resize', onWindowResize );
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-
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- //
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-
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- if ( typeof TESTING !== 'undefined' ) { for ( let i = 0; i < 200; i ++ ) { render(); } };
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-
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- }
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-
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- function onWindowResize() {
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-
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- camera.aspect = window.innerWidth / window.innerHeight;
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- camera.updateProjectionMatrix();
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-
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- renderer.setSize( window.innerWidth, window.innerHeight );
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-
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- }
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-
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- function animate() {
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-
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- renderer.setAnimationLoop( render );
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-
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- }
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-
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- function render() {
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-
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- for ( let i = 0; i < speed; i ++ ) draw();
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-
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- attractor.geometry.attributes.position.needsUpdate = true;
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- attractor.geometry.attributes.color.needsUpdate = true;
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- attractor.rotation.z += .001;
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-
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- renderer.render( scene, camera );
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-
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- }
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-
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- </script>
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- </body>
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-</html>
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Mr.doob
