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misc_lookat.html
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<!DOCTYPE html>
<html lang="en">
<head>
<title>Verge3D 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://www.soft8soft.com/verge3d" target="_blank" rel="noopener">Verge3D</a> - Object3D.lookAt() example</div>
<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>
<script type="importmap">
{
"imports": {
"v3d": "../build/v3d.module.js",
"v3d/addons/": "./jsm/"
}
}
</script>
<script type="module">
import * as v3d from 'v3d';
import Stats from 'v3d/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 v3d.PerspectiveCamera(40, window.innerWidth / window.innerHeight, 1, 15000);
camera.position.z = 3200;
scene = new v3d.Scene();
scene.background = new v3d.Color(0xffffff);
sphere = new v3d.Mesh(new v3d.SphereGeometry(100, 20, 20), new v3d.MeshNormalMaterial());
scene.add(sphere);
const geometry = new v3d.CylinderGeometry(0, 10, 100, 12);
geometry.rotateX(Math.PI / 2);
const material = new v3d.MeshNormalMaterial();
for (let i = 0; i < 1000; i++) {
const mesh = new v3d.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 v3d.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>