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.
152 lines
3.6 KiB
152 lines
3.6 KiB
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<title>three.js misc - lookAt</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">
|
|
<style>
|
|
body {
|
|
background-color: #fff;
|
|
color: #444;
|
|
}
|
|
|
|
a {
|
|
color: #08b;
|
|
}
|
|
</style>
|
|
</head>
|
|
<body>
|
|
<div id="info"><a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - Object3D.lookAt() example</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 Stats from 'three/addons/libs/stats.module.js';
|
|
|
|
let camera, scene, renderer, stats;
|
|
|
|
let sphere;
|
|
|
|
let mouseX = 0, mouseY = 0;
|
|
|
|
let windowHalfX = window.innerWidth / 2;
|
|
let windowHalfY = window.innerHeight / 2;
|
|
|
|
document.addEventListener( 'mousemove', onDocumentMouseMove );
|
|
|
|
init();
|
|
animate();
|
|
|
|
|
|
function init() {
|
|
|
|
camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 15000 );
|
|
camera.position.z = 3200;
|
|
|
|
scene = new THREE.Scene();
|
|
scene.background = new THREE.Color( 0xffffff );
|
|
|
|
sphere = new THREE.Mesh( new THREE.SphereGeometry( 100, 20, 20 ), new THREE.MeshNormalMaterial() );
|
|
scene.add( sphere );
|
|
|
|
const geometry = new THREE.CylinderGeometry( 0, 10, 100, 12 );
|
|
geometry.rotateX( Math.PI / 2 );
|
|
|
|
const material = new THREE.MeshNormalMaterial();
|
|
|
|
for ( let i = 0; i < 1000; i ++ ) {
|
|
|
|
const mesh = new THREE.Mesh( geometry, material );
|
|
mesh.position.x = Math.random() * 4000 - 2000;
|
|
mesh.position.y = Math.random() * 4000 - 2000;
|
|
mesh.position.z = Math.random() * 4000 - 2000;
|
|
mesh.scale.x = mesh.scale.y = mesh.scale.z = Math.random() * 4 + 2;
|
|
scene.add( mesh );
|
|
|
|
}
|
|
|
|
renderer = new THREE.WebGLRenderer( { antialias: true } );
|
|
renderer.setPixelRatio( window.devicePixelRatio );
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
document.body.appendChild( renderer.domElement );
|
|
|
|
stats = new Stats();
|
|
document.body.appendChild( stats.dom );
|
|
|
|
//
|
|
|
|
window.addEventListener( 'resize', onWindowResize );
|
|
|
|
}
|
|
|
|
function onWindowResize() {
|
|
|
|
windowHalfX = window.innerWidth / 2;
|
|
windowHalfY = window.innerHeight / 2;
|
|
|
|
camera.aspect = window.innerWidth / window.innerHeight;
|
|
camera.updateProjectionMatrix();
|
|
|
|
renderer.setSize( window.innerWidth, window.innerHeight );
|
|
|
|
}
|
|
|
|
function onDocumentMouseMove( event ) {
|
|
|
|
mouseX = ( event.clientX - windowHalfX ) * 10;
|
|
mouseY = ( event.clientY - windowHalfY ) * 10;
|
|
|
|
}
|
|
|
|
//
|
|
|
|
function animate() {
|
|
|
|
requestAnimationFrame( animate );
|
|
|
|
render();
|
|
stats.update();
|
|
|
|
}
|
|
|
|
function render() {
|
|
|
|
const time = Date.now() * 0.0005;
|
|
|
|
sphere.position.x = Math.sin( time * 0.7 ) * 2000;
|
|
sphere.position.y = Math.cos( time * 0.5 ) * 2000;
|
|
sphere.position.z = Math.cos( time * 0.3 ) * 2000;
|
|
|
|
for ( let i = 1, l = scene.children.length; i < l; i ++ ) {
|
|
|
|
scene.children[ i ].lookAt( sphere.position );
|
|
|
|
}
|
|
|
|
camera.position.x += ( mouseX - camera.position.x ) * .05;
|
|
camera.position.y += ( - mouseY - camera.position.y ) * .05;
|
|
camera.lookAt( scene.position );
|
|
|
|
renderer.render( scene, camera );
|
|
|
|
}
|
|
|
|
</script>
|
|
|
|
</body>
|
|
</html>
|
|
|