Proof of Concept: non affine texturing within Three.js

Un-comment ONE of the imported three.module.js files, to appreciate the difference in texturing quality

by Chrisssie

CSS

body {
	background-color: #000;
	margin: 0px;
	overflow: hidden;
}

JavaScript

// activate this line for non-affine, perspective correct texturing (with vertical lines in texture rendered as STRAIGHT lines)
import * as THREE from "https://vielzutun.ch/wordpress/public/three.module.js";

// activate this line for standard affine texturing (with vertical lines in texture rendered as zig-zag)
//import * as THREE from "https://threejs.org/build/three.module.js";
import { OrbitControls } from "https://threejs.org/examples/jsm/controls/OrbitControls.js";
import { GUI } from "https://threejs.org/examples/jsm/libs/lil-gui.module.min.js";

var renderer, scene, camera, controls;

let testMesh, testMaterial, testGeometry;

const PI_180 = Math.PI / 180.0;
const points = [];

let wireMaterial, flatMaterial, gouraudMaterial, phongMaterial, texturedMaterial, reflectiveMaterial;
let ambientLight, light;
let parameters;
let shading = '';
let latheSegments = 0;


init();
animate();
//render();

function init() {

    // camera
  camera = new THREE.PerspectiveCamera(40, window.innerWidth / window.innerHeight, 1, 10000);
  camera.position.set(0, 70, 60);


// renderer
  renderer = new THREE.WebGLRenderer();
  renderer.setPixelRatio(window.devicePixelRatio);
  renderer.setSize(window.innerWidth, window.innerHeight);
  renderer.outputEncoding = THREE.sRGBEncoding;
  document.body.appendChild(renderer.domElement);

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

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


  // light
  ambientLight = new THREE.AmbientLight(0x444444);

  light = new THREE.DirectionalLight(0xffffff, 1);
  light.position.set(32, 39, 70);
  
  scene.add( ambientLight );
  scene.add( light );

  // axes
  scene.add(new THREE.AxesHelper(40));

  // Textures

const textureEquirec = new THREE.TextureLoader().load( "https://vielzutun.ch/wordpress/public/pano_2k.jpg" );
//  const textureEquirec = new THREE.TextureLoader().load( "https://vielzutun.ch/wordpress/public/uv_grid_opengl.jpg" );
  textureEquirec.mapping =...