JSFiddle - React, Tailwind, and code Playground

by grano

HTML

<script src="//cdn.rawgit.com/mrdoob/three.js/master/build/three.min.js"></script>
<script src="https://threejs.org/examples/js/controls/OrbitControls.js"></script>
<script src="https://threejs.org/examples/js/dat.gui.module.js"></script>

CSS

body {
	  margin: 0;
}

JavaScript

var camera1, camera2, scene, renderer, controls;
var geometry, material, mesh;
var views;

init();
setView();
animate();


function init() {

		//renderer
    renderer = new THREE.WebGLRenderer( { antialias: true } );
    renderer.setSize( window.innerWidth, window.innerHeight );
    document.body.appendChild( renderer.domElement );

		// scene
    scene = new THREE.Scene();       
    
 		// camera
    camera1 = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 0.01, 50 );
    camera1.position.set(0,0,0)
    const cameraHelper = new THREE.CameraHelper( camera1 );
    scene.add(cameraHelper)
    
    camera2 = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 1000 );
    camera2.position.set(0,10,50);
	  camera2.lookAt(0,0,0);

    
    // camera control
    controls = new THREE.OrbitControls( camera1, renderer.domElement );
    controls.target.set( 0, 0, -10 );
    
    // cube
    const cubeGeometry = new THREE.BoxGeometry( 1, 1, 1 );
    const cubeMaterial = new THREE.MeshBasicMaterial( {color: 0x00ff00} );
    const cubeMesh = new THREE.Mesh( cubeGeometry, cubeMaterial );
    scene.add( cubeMesh );
    cubeMesh.position.z = -10;
    
		geometry = new THREE.SphereGeometry( 5, 32, 32 );
    material = new THREE.MeshBasicMaterial( {color: 0xffff00} );
    mesh = new THREE.Mesh( geometry, material );
    scene.add( mesh );
    mesh.position.set(0,0,-20);
       
    scene.add(mesh);
}

function setView() {
 views = [
  {
    camera: camera1,
    left: 0,
    bottom: 0,
    width: 1.0,
    height: 1.0,
    fov: 45,
    background: new THREE.Color(0x000000),
  },
  {
    camera: camera2,
    left: 0.65,
    bottom: 0.0,
    width: 0.35,
    height: 0.5,
    fov: 45,
    background: new THREE.Color(0xffffff),
  },
]
 }
function animate() {

    requestAnimationFrame( animate );
    controls.update()
    
  	views.forEach( (view) => {
      const left = Math.floor( window.innerWidth * view.left );
      const bottom =...