JSFiddle - React, Tailwind, and code Playground

by realhunts

HTML

<script src="https://threejs.org/build/three.min.js"></script>
<script src="https://threejs.org/examples/js/controls/OrbitControls.js"></script>

JavaScript

// a basic three.js scene

var container, renderer, scene, camera, controls;

init();
animate();

function init() {

    // renderer
    renderer = new THREE.WebGLRenderer({
        antialias: false
    });
    renderer.setSize(window.innerWidth, window.innerHeight);
    renderer.setClearColor(0xccccff);
    container = document.createElement('div');
    document.body.appendChild(container);
    container.appendChild(renderer.domElement);

    // scene
    scene = new THREE.Scene();

    // camera
    camera = new THREE.PerspectiveCamera(45, window.innerWidth / window.innerHeight, 1, 10000);
    camera.position.set(0, 200, 800);
    camera.lookAt(scene.position);

    // (camera) controls
    // mouse controls: left button to rotate, 
    //    mouse wheel to zoom, right button to pan
    controls = new THREE.OrbitControls(camera, renderer.domElement);

    // light    
    var light = new THREE.PointLight(0xffffff);
    light.position.set(100, 250, 250);
    scene.add(light);

    // mesh
    var sphereGeometry = new THREE.SphereGeometry(500, 32, 16);
    var sphereMaterial = new THREE.MeshBasicMaterial({
        color: 0xff0000
    });
    var sphere = new THREE.Mesh(sphereGeometry, sphereMaterial);
    sphere.position.y = 100;
    scene.add(sphere);



var spherical = new THREE.Sphere(new THREE.Vector3(0, 100, 0), 500); // create once. Then 

var bx = []
var tpos = new THREE.Vector3();
for(var i = 0; i<1; i++){
var box = new THREE.Mesh(new THREE.BoxGeometry(30, 30, 30))
scene.add(box)
box.velocity = new THREE.Vector3();
//box.position.x = 100*(i/2)

box.position.z = 500
spherical.clampPoint(box.position, tpos)

box.position.copy(tpos)
box.velocity.copy(box.position)
//spherical.set( 100, 1*(i/2), Math.random()*(i/3) ); 
//box.position.setFromSpherical( spherical )
//box.geometry.translate(0, 100, 0)
bx.push(box)
}

var alpha = 0
setInterval(()=>{
alpha += 2

/*for(var i = 0; i<bx.length; i++){
bx[i].position.z = alpha
spherical.clampPoint(bx[i].position,...