You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
143 lines
3.4 KiB
143 lines
3.4 KiB
3 years ago
|
<!DOCTYPE html>
|
||
|
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>three.js webgl - level of detail</title>
|
||
|
|
<meta charset="utf-8">
|
||
|
|
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
|
||
|
|
<link type="text/css" rel="stylesheet" href="main.css">
|
||
|
|
</head>
|
||
|
|
|
||
|
|
<body>
|
||
|
|
<div id="info">
|
||
|
|
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - level of detail
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<!-- Import maps polyfill -->
|
||
|
|
<!-- Remove this when import maps will be widely supported -->
|
||
|
|
<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
|
||
|
|
|
||
|
|
<script type="importmap">
|
||
|
|
{
|
||
|
|
"imports": {
|
||
|
|
"three": "../build/three.module.js",
|
||
|
|
"three/addons/": "./jsm/"
|
||
|
|
}
|
||
|
|
}
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<script type="module">
|
||
|
|
|
||
|
|
import * as THREE from 'three';
|
||
|
|
|
||
|
|
import { FlyControls } from 'three/addons/controls/FlyControls.js';
|
||
|
|
|
||
|
|
let container;
|
||
|
|
|
||
|
|
let camera, scene, renderer, controls;
|
||
|
|
|
||
|
|
const clock = new THREE.Clock();
|
||
|
|
|
||
|
|
init();
|
||
|
|
animate();
|
||
|
|
|
||
|
|
function init() {
|
||
|
|
|
||
|
|
container = document.createElement( 'div' );
|
||
|
|
document.body.appendChild( container );
|
||
|
|
|
||
|
|
camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 15000 );
|
||
|
|
camera.position.z = 1000;
|
||
|
|
|
||
|
|
scene = new THREE.Scene();
|
||
|
|
scene.fog = new THREE.Fog( 0x000000, 1, 15000 );
|
||
|
|
|
||
|
|
const pointLight = new THREE.PointLight( 0xff2200 );
|
||
|
|
pointLight.position.set( 0, 0, 0 );
|
||
|
|
scene.add( pointLight );
|
||
|
|
|
||
|
|
const dirLight = new THREE.DirectionalLight( 0xffffff );
|
||
|
|
dirLight.position.set( 0, 0, 1 ).normalize();
|
||
|
|
scene.add( dirLight );
|
||
|
|
|
||
|
|
const geometry = [
|
||
|
|
|
||
|
|
[ new THREE.IcosahedronGeometry( 100, 16 ), 50 ],
|
||
|
|
[ new THREE.IcosahedronGeometry( 100, 8 ), 300 ],
|
||
|
|
[ new THREE.IcosahedronGeometry( 100, 4 ), 1000 ],
|
||
|
|
[ new THREE.IcosahedronGeometry( 100, 2 ), 2000 ],
|
||
|
|
[ new THREE.IcosahedronGeometry( 100, 1 ), 8000 ]
|
||
|
|
|
||
|
|
];
|
||
|
|
|
||
|
|
const material = new THREE.MeshLambertMaterial( { color: 0xffffff, wireframe: true } );
|
||
|
|
|
||
|
|
for ( let j = 0; j < 1000; j ++ ) {
|
||
|
|
|
||
|
|
const lod = new THREE.LOD();
|
||
|
|
|
||
|
|
for ( let i = 0; i < geometry.length; i ++ ) {
|
||
|
|
|
||
|
|
const mesh = new THREE.Mesh( geometry[ i ][ 0 ], material );
|
||
|
|
mesh.scale.set( 1.5, 1.5, 1.5 );
|
||
|
|
mesh.updateMatrix();
|
||
|
|
mesh.matrixAutoUpdate = false;
|
||
|
|
lod.addLevel( mesh, geometry[ i ][ 1 ] );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
lod.position.x = 10000 * ( 0.5 - Math.random() );
|
||
|
|
lod.position.y = 7500 * ( 0.5 - Math.random() );
|
||
|
|
lod.position.z = 10000 * ( 0.5 - Math.random() );
|
||
|
|
lod.updateMatrix();
|
||
|
|
lod.matrixAutoUpdate = false;
|
||
|
|
scene.add( lod );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
renderer = new THREE.WebGLRenderer( { antialias: true } );
|
||
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
||
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
||
|
|
container.appendChild( renderer.domElement );
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
controls = new FlyControls( camera, renderer.domElement );
|
||
|
|
controls.movementSpeed = 1000;
|
||
|
|
controls.rollSpeed = Math.PI / 10;
|
||
|
|
|
||
|
|
//
|
||
|
|
|
||
|
|
window.addEventListener( 'resize', onWindowResize );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function onWindowResize() {
|
||
|
|
|
||
|
|
camera.aspect = window.innerWidth / window.innerHeight;
|
||
|
|
camera.updateProjectionMatrix();
|
||
|
|
|
||
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function animate() {
|
||
|
|
|
||
|
|
requestAnimationFrame( animate );
|
||
|
|
render();
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
function render() {
|
||
|
|
|
||
|
|
controls.update( clock.getDelta() );
|
||
|
|
|
||
|
|
renderer.render( scene, camera );
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
</script>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|