123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222 |
- <!-- Licensed under a BSD license. See license.html for license -->
- <!DOCTYPE html>
- <html>
- <head>
- <meta charset="utf-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
- <title>Three.js - Align HTML Elements w/hiding</title>
- <style>
- html, body {
- height: 100%;
- margin: 0;
- }
- #c {
- width: 100%; /* let our container decide our size */
- height: 100%;
- display: block;
- }
- #container {
- position: relative; /* makes this the origin of its children */
- width: 100%;
- height: 100%;
- overflow: hidden;
- }
- #labels {
- position: absolute; /* let us position ourself inside the container */
- z-index: 0; /* make a new stacking context so children don't sort with rest of page */
- left: 0; /* make our position the top left of the container */
- top: 0;
- color: white;
- }
- #labels>div {
- white-space: nowrap;
- position: absolute; /* let us position them inside the container */
- left: 0; /* make their default position the top left of the container */
- top: 0;
- cursor: pointer; /* change the cursor to a hand when over us */
- font-size: large;
- user-select: none; /* don't let the text get selected */
- text-shadow: /* create a black outline */
- -1px -1px 0 #000,
- 0 -1px 0 #000,
- 1px -1px 0 #000,
- 1px 0 0 #000,
- 1px 1px 0 #000,
- 0 1px 0 #000,
- -1px 1px 0 #000,
- -1px 0 0 #000;
- }
- #labels>div:hover {
- color: red;
- }
- </style>
- </head>
- <body>
- <div id="container">
- <canvas id="c"></canvas>
- <div id="labels"></div>
- </div>
- </body>
- <script type="importmap">
- {
- "imports": {
- "three": "../../build/three.module.js",
- "three/addons/": "../../examples/jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
- function main() {
- const canvas = document.querySelector( '#c' );
- const renderer = new THREE.WebGLRenderer( { antialias: true, canvas } );
- const fov = 75;
- const aspect = 2; // the canvas default
- const near = 1.1;
- const far = 20;
- const camera = new THREE.PerspectiveCamera( fov, aspect, near, far );
- camera.position.z = 7;
- const controls = new OrbitControls( camera, canvas );
- controls.target.set( 0, 0, 0 );
- controls.update();
- const scene = new THREE.Scene();
- {
- const color = 0xFFFFFF;
- const intensity = 3;
- const light = new THREE.DirectionalLight( color, intensity );
- light.position.set( - 1, 2, 4 );
- scene.add( light );
- }
- const boxWidth = 1;
- const boxHeight = 1;
- const boxDepth = 1;
- const geometry = new THREE.BoxGeometry( boxWidth, boxHeight, boxDepth );
- const labelContainerElem = document.querySelector( '#labels' );
- function makeInstance( geometry, color, x, name ) {
- const material = new THREE.MeshPhongMaterial( { color } );
- const cube = new THREE.Mesh( geometry, material );
- scene.add( cube );
- cube.position.x = x;
- const elem = document.createElement( 'div' );
- elem.textContent = name;
- labelContainerElem.appendChild( elem );
- return { cube, elem };
- }
- const cubes = [
- makeInstance( geometry, 0x44aa88, 0, 'Aqua Colored Box' ),
- makeInstance( geometry, 0x8844aa, - 2, 'Purple Colored Box' ),
- makeInstance( geometry, 0xaa8844, 2, 'Gold Colored Box' ),
- ];
- function resizeRendererToDisplaySize( renderer ) {
- const canvas = renderer.domElement;
- const width = canvas.clientWidth;
- const height = canvas.clientHeight;
- const needResize = canvas.width !== width || canvas.height !== height;
- if ( needResize ) {
- renderer.setSize( width, height, false );
- }
- return needResize;
- }
- const tempV = new THREE.Vector3();
- const raycaster = new THREE.Raycaster();
- function render( time ) {
- time *= 0.001;
- if ( resizeRendererToDisplaySize( renderer ) ) {
- const canvas = renderer.domElement;
- camera.aspect = canvas.clientWidth / canvas.clientHeight;
- camera.updateProjectionMatrix();
- }
- cubes.forEach( ( cubeInfo, ndx ) => {
- const { cube, elem } = cubeInfo;
- const speed = 1 + ndx * .1;
- const rot = time * speed;
- cube.rotation.x = rot;
- cube.rotation.y = rot;
- // get the position of the center of the cube
- cube.updateWorldMatrix( true, false );
- cube.getWorldPosition( tempV );
- // get the normalized screen coordinate of that position
- // x and y will be in the -1 to +1 range with x = -1 being
- // on the left and y = -1 being on the bottom
- tempV.project( camera );
- // ask the raycaster for all the objects that intersect
- // from the eye toward this object's position
- raycaster.setFromCamera( tempV, camera );
- const intersectedObjects = raycaster.intersectObjects( scene.children );
- // We're visible if the first intersection is this object.
- const show = intersectedObjects.length && cube === intersectedObjects[ 0 ].object;
- if ( ! show || Math.abs( tempV.z ) > 1 ) {
- // hide the label
- elem.style.display = 'none';
- } else {
- // unhide the label
- elem.style.display = '';
- // convert the normalized position to CSS coordinates
- const x = ( tempV.x * .5 + .5 ) * canvas.clientWidth;
- const y = ( tempV.y * - .5 + .5 ) * canvas.clientHeight;
- // move the elem to that position
- elem.style.transform = `translate(-50%, -50%) translate(${x}px,${y}px)`;
- // set the zIndex for sorting
- elem.style.zIndex = ( - tempV.z * .5 + .5 ) * 100000 | 0;
- }
- } );
- renderer.render( scene, camera );
- requestAnimationFrame( render );
- }
- requestAnimationFrame( render );
- }
- main();
- </script>
- </html>
|