Trivial three dynamic light

by sjpt

HTML

Trivial three dynamic light test
<script src="https://threejs.org/build/three.js" />

JavaScript

var camera, scene, renderer, geometry, material, mesh, sub, frame = 0;
//var THREE = import('THREE');

init();
animate();

function init() {
  console.log('----------------------------------------------');

  scene = new THREE.Scene();
  sub = new THREE.Group();
  scene.add(sub);

  camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1, 10000);
  camera.position.z = 500;
  //scene.add(camera);

  renderer = new THREE.WebGLRenderer();
  renderer.setSize(window.innerWidth, window.innerHeight - 50);
  document.body.appendChild(renderer.domElement);

var geometry = new THREE.CubeGeometry(100, 100, 100);
  var material = new THREE.MeshBasicMaterial();
  var mesh = new THREE.Mesh(geometry, material);
  mesh.position.set(100, 100, 100);
  mesh.updateMatrixWorld(true)
  sub.add(mesh);
}

function animate() {
  frame++;

  if (frame === 1) {
    mesh = new THREE.Mesh();
    sub.add(mesh);

    //mesh.visible = false;
    light = new THREE.DirectionalLight(0xffffff);
    light.position.set(1, 1, 1);
    scene.add(light);
}

  if (frame === 20) { // works fine if we use frame === 1
    geometry = new THREE.CubeGeometry(200, 200, 200);
    mesh.geometry = geometry;
    material = new THREE.MeshPhongMaterial();
    mesh.material = material;

    //material.needsUpdate = true;
    //light.updateMatrix(); light.updateMatrixWorld();
  }
  if (frame === 60) {
    //mesh.visible = true;
  }

  requestAnimationFrame(animate);
  sub.rotation.x += 0.01;
  sub.rotation.y += 0.02;
  sub.autoUpdateMatrix = true;
  sub.matrixWorldNeedsUpdate = true;
  renderer.render(scene, camera);

}