bezier curves interpolation

by black strings

CSS

body {
	background-color: #000;
	margin: 0px;
	overflow: hidden;
}

JavaScript

// Simple three.js example

import * as THREE from "https://unpkg.com/[email protected]/build/three.module.js";
import { OrbitControls } from "https://unpkg.com/[email protected]/examples/jsm/controls/OrbitControls.js";

var mesh, renderer, scene, camera, controls;

init();
animate();

function init() {

    // renderer
    renderer = new THREE.WebGLRenderer();
    renderer.setSize( window.innerWidth, window.innerHeight );
    renderer.setPixelRatio( window.devicePixelRatio );
    document.body.appendChild( renderer.domElement );

    // scene
    scene = new THREE.Scene();
    
    // camera
    camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 10000 );
    camera.position.set( 20, 20, 20 );

    // controls
    controls = new OrbitControls( camera, renderer.domElement );
    
    // ambient
    scene.add( new THREE.AmbientLight( 0x222222 ) );
    
    // light
    var light = new THREE.DirectionalLight( 0xffffff, 1 );
    light.position.set( 20,20, 0 );
    scene.add( light );
    
    // axes
    scene.add( new THREE.AxesHelper( 20 ) );

    // geometry
    var geometry = new THREE.SphereGeometry( 5, 12, 8 );
    
    // material
    var material = new THREE.MeshPhongMaterial( {
        color: 0x00ffff, 
        flatShading: true,
        transparent: true,
        opacity: 0.7,
    } );
    
    // mesh
    mesh = new THREE.Mesh( geometry, material );
    scene.add( mesh );
    
    const d = 20;
     const point2d = [
    	new THREE.Vector2(0,0), new THREE.Vector2(0, d), new THREE.Vector2(d, d), new THREE.Vector2(d,0)
    ];
    
   /* 	for(const p of point2d) {
   	      p.multiplyScalar(20.0);
   	    } */
    
    const shape = new THREE.Shape(point2d);
/*shape.moveTo( 0, 0 );
shape.lineTo( 0, 10 );
shape.lineTo( 10, 10 );
shape.lineTo( 10, 0 ); */

const g = new THREE.ShapeGeometry( shape );
const m = new THREE.MeshBasicMaterial( { color: 0xff0000 } );
mesh = new THREE.Mesh( g, m );
    mesh.add(new THREE.AxesHelper(10));
   ...