@adhiban/three-mesh-ui/examples/nested_blocks.js

a library on top of three.js to help in creating 3D user interfaces, with minor changes ;)

import * as THREE from "three";
import { VRButton } from "three/examples/jsm/webxr/VRButton.js";
import { OrbitControls } from "three/examples/jsm/controls/OrbitControls.js";
import { BoxLineGeometry } from "three/examples/jsm/geometries/BoxLineGeometry.js";

import ThreeMeshUI from "../src/three-mesh-ui.js";

import SnakeImage from "./assets/spiny_bush_viper.jpg";
import FontJSON from "./assets/Roboto-msdf.json";
import FontImage from "./assets/Roboto-msdf.png";

const WIDTH = window.innerWidth;
const HEIGHT = window.innerHeight;

let scene, camera, renderer, controls;

window.addEventListener("load", init);
window.addEventListener("resize", onWindowResize);

//

function init() {
  scene = new THREE.Scene();
  scene.background = new THREE.Color(0x505050);

  camera = new THREE.PerspectiveCamera(60, WIDTH / HEIGHT, 0.1, 100);

  renderer = new THREE.WebGLRenderer({ antialias: true });
  renderer.setPixelRatio(window.devicePixelRatio);
  renderer.setSize(WIDTH, HEIGHT);
  renderer.xr.enabled = true;
  document.body.appendChild(VRButton.createButton(renderer));
  document.body.appendChild(renderer.domElement);

  controls = new OrbitControls(camera, renderer.domElement);
  camera.position.set(0, 1.6, 0);
  controls.target = new THREE.Vector3(0, 1, -1.8);
  controls.update();

  // ROOM

  const room = new THREE.LineSegments(
    new BoxLineGeometry(6, 6, 6, 10, 10, 10).translate(0, 3, 0),
    new THREE.LineBasicMaterial({ color: 0x808080 })
  );

  scene.add(room);

  // TEXT PANEL

  makeTextPanel();

  //

  renderer.setAnimationLoop(loop);
}

//

function makeTextPanel() {
  const container = new ThreeMeshUI.Block({
    ref: "container",
    padding: 0.025,
    fontFamily: FontJSON,
    fontTexture: FontImage,
    fontColor: new THREE.Color(0xffffff),
    backgroundOpacity: 0,
  });

  container.position.set(0, 1, -1.8);
  container.rotation.x = -0.55;
  scene.add(container);

  //

  const title = new ThreeMeshUI.Block({
    height: 0.2,
    width: 1.5,
    margin: 0.025,
    justifyContent: "center",
    fontSize: 0.09,
  });

  title.add(
    new ThreeMeshUI.Text({
      content: "spiny bush viper",
    })
  );

  container.add(title);

  //

  const leftSubBlock = new ThreeMeshUI.Block({
    height: 0.95,
    width: 1.0,
    margin: 0.025,
    padding: 0.025,
    textAlign: "left",
    justifyContent: "end",
  });

  const caption = new ThreeMeshUI.Block({
    height: 0.07,
    width: 0.37,
    textAlign: "center",
    justifyContent: "center",
  });

  caption.add(
    new ThreeMeshUI.Text({
      content: "Mind your fingers",
      fontSize: 0.04,
    })
  );

  leftSubBlock.add(caption);

  //

  const rightSubBlock = new ThreeMeshUI.Block({
    margin: 0.025,
  });

  const subSubBlock1 = new ThreeMeshUI.Block({
    height: 0.35,
    width: 0.5,
    margin: 0.025,
    padding: 0.02,
    fontSize: 0.04,
    justifyContent: "center",
    backgroundOpacity: 0,
  }).add(
    new ThreeMeshUI.Text({
      content: "Known for its extremely keeled dorsal scales that give it a ",
    }),

    new ThreeMeshUI.Text({
      content: "bristly",
      fontColor: new THREE.Color(0x92e66c),
    }),

    new ThreeMeshUI.Text({
      content: " appearance.",
    })
  );

  const subSubBlock2 = new ThreeMeshUI.Block({
    height: 0.53,
    width: 0.5,
    margin: 0.01,
    padding: 0.02,
    fontSize: 0.025,
    alignItems: "start",
    textAlign: 'justify',
    backgroundOpacity: 0,
  }).add(
    new ThreeMeshUI.Text({
      content:
        "The males of this species grow to maximum total length of 73 cm (29 in): body 58 cm (23 in), tail 15 cm (5.9 in). Females grow to a maximum total length of 58 cm (23 in). The males are surprisingly long and slender compared to the females.\nThe head has a short snout, more so in males than in females.\nThe eyes are large and surrounded by 9–16 circumorbital scales. The orbits (eyes) are separated by 7–9 scales.",
    })
  );

  rightSubBlock.add(subSubBlock1, subSubBlock2);

  //

  const contentContainer = new ThreeMeshUI.Block({
    contentDirection: "row",
    padding: 0.02,
    margin: 0.025,
    backgroundOpacity: 0,
  });

  contentContainer.add(leftSubBlock, rightSubBlock);
  container.add(contentContainer);

  //

  new THREE.TextureLoader().load(SnakeImage, (texture) => {
    leftSubBlock.set({
      backgroundTexture: texture,
    });
  });
}

//

function onWindowResize() {
  camera.aspect = window.innerWidth / window.innerHeight;
  camera.updateProjectionMatrix();
  renderer.setSize(window.innerWidth, window.innerHeight);
}

//

function loop() {
  // Don't forget, ThreeMeshUI must be updated manually.
  // This has been introduced in version 3.0.0 in order
  // to improve performance
  ThreeMeshUI.update();

  controls.update();
  renderer.render(scene, camera);
}