Threejs - UV test1

by black strings

HTML

<script src="https://cdn.jsdelivr.net/npm/[email protected]/build/three.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/examples/js/controls/OrbitControls.js"></script>

CSS

/* fix mouse click offset errors when doing drags */
body {
  margin: 0;
}

JavaScript

var scene, renderer, camera;
var controls;

init();
lightSetup();
animate();

function init() {
  renderer = new THREE.WebGLRenderer({
    antialias: true
  });
  var width = window.innerWidth;
  var height = window.innerHeight;
  renderer.setSize(width, height);
  document.body.appendChild(renderer.domElement);

  scene = new THREE.Scene();
  scene.rotation.x = -Math.PI / 2;

  var gridXZ = new THREE.GridHelper(1000, 100);
  scene.add(gridXZ);
  gridXZ.rotation.x = -Math.PI / 2;


  var axes = new THREE.AxesHelper(1000);
  scene.add(axes);

  camera = new THREE.PerspectiveCamera(45, width / height, 1, 10000);
  camera.position.y = 50;
  camera.position.z = 50;
  camera.lookAt(new THREE.Vector3(0, 0, 0));

  controls = new THREE.OrbitControls(camera, renderer.domElement);

  const loader = new THREE.TextureLoader();

  const texture = loader.load('https://threejs.org/examples/textures/uv_grid_opengl.jpg', (texture) => {
    const geometry = new THREE.BoxGeometry(10, 10, 10);

    const material = new THREE.MeshBasicMaterial({
      map: texture
    });

    const mesh = new THREE.Mesh(geometry, material);

    accessFaces(geometry);

    accessUV(geometry);

    scene.add(mesh);

  });


}

function getAngleBetweenTwoVectorsInRad(p1, p2) {
  let result;
  if (p1 && p2) {
    const angle1 = Math.atan2(p1.y, p1.x);
    const angle2 = Math.atan2(p2.y, p2.x);
    result = (angle2 - angle1);
  } else {
    throw new Error(`Cannot get angle: one (or both) vector(s) is null.`);
  }
  return result;
}

function animate() {
  controls.update();
  requestAnimationFrame(animate);
  renderer.render(scene, camera);
}

function lightSetup() {
  if (scene) {
    var dirLight = new THREE.DirectionalLight();
    dirLight.position.set(3, 2, 1);
    dirLight.position.multiplyScalar(10);
    scene.add(dirLight);
  }

}

function createSphereInstancedMesh(color, points) {
  var geometry = new THREE.SphereGeometry(1, 10, 10);

  var material = new THREE.MeshBasicMaterial({
    color:...