JSFiddle - React, Tailwind, and code Playground

by realhunts

HTML

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

JavaScript

// a basic three.js scene

var container, renderer, scene, camera, controls;
var dummy = new THREE.Object3D();
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.BoxBufferGeometry(50, 50, 50);
    var sphereMaterial = new THREE.MeshLambertMaterial({
        color: 0xff0000
    });
    var sphere = new THREE.Mesh(sphereGeometry, sphereMaterial);
    sphere.position.y = 100;
    scene.add(sphere);
    
    
    //the instance group 

  var range = 400;
  var count = 300;
var material = new THREE.MeshNormalMaterial();

var mesh = new THREE.InstancedMesh( sphere.geometry, material, count );
scene.add( mesh );


for ( var i = 0; i < count; i ++ ) {
 var x = range / 2 - Math.random() * range;
                var z = range / 2 - Math.random() * range;
                
	dummy.position.set(
		x,
		1,
		z
	);

	
  
  dummy.rotation.y += .05

	dummy.updateMatrix();

	mesh.setMatrixAt( i, dummy.matrix );
	
}

mesh.instanceMatrix.needsUpdate = true;



    var planeGeometry = new THREE.PlaneGeometry(500, 500, 10, 10);
    var planeMaterial = new THREE.MeshLambertMaterial({
       ...