Rossler Line

by amitlzkpa

CSS

body {
  margin: 0px;
}

JavaScript

// Simple three.js example
// https://www.jsdelivr.com/package/npm/three
import * as THREE from "https://cdn.skypack.dev/[email protected]/build/three.module.js";
import { OrbitControls } from "https://cdn.skypack.dev/[email protected]/examples/jsm/controls/OrbitControls.js";

THREE.Object3D.DefaultUp.set(0, 0, 1);

let renderer, scene, camera, controls;

init();
animate();
function init() {
    renderer = new THREE.WebGLRenderer();
    renderer.setSize( window.innerWidth, window.innerHeight );
    document.body.appendChild( renderer.domElement );
    scene = new THREE.Scene();
    camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 100000 );
    camera.position.set( 20, 20, 20 );
    controls = new OrbitControls( camera, renderer.domElement );
    scene.add( new THREE.AmbientLight( 0x222222 ) );
    let light = new THREE.DirectionalLight( 0xffffff, 1 );
    light.position.set( 20, 20, 0 );
    scene.add( light );
    // scene.add( new THREE.AxesHelper( 20 ) );
    window.addEventListener( 'resize', onWindowResize, false );
}

function animate() {
    requestAnimationFrame( animate );
    renderer.render( scene, camera );
}

function onWindowResize(){
    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();
    renderer.setSize( window.innerWidth, window.innerHeight );
}



// --------------------------------------



let TIME_STEP = 100;
let MOVE_STEP = 40;
let MAX_POINTS = 4000;

let a = 0.2;
let b = 0.2;
let c = 5.7;
let dt = 0.005;

let positions;
let line;

let lstX = 0.1;
let lstY = 0.1;
let lstZ = 0.1;



function lzInit() {
  let geometry = new THREE.BufferGeometry();
  positions = new Float32Array( MAX_POINTS * 3 );
  geometry.addAttribute( 'position', new THREE.BufferAttribute( positions, 3 ) );
  let material = new THREE.LineBasicMaterial( { color: 0xff0000 } );
  line = new THREE.Line( geometry,  material );
  line.scale.set(0.1, 0.1, 0.1);
  scene.add( line );
  
 ...