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<!DOCTYPE html>
<html lang="en">
<head>
<title>three.js webgl - trackball controls</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: #ccc;
color: #000;
}
a {
color: #f00;
}
</style>
</head>
<body>
<div id="info">
<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - trackball controls<br />
MOVE mouse &amp; press LEFT/A: rotate, MIDDLE/S: zoom, RIGHT/D: pan
</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';
import { GUI } from 'three/addons/libs/lil-gui.module.min.js';
import { TrackballControls } from 'three/addons/controls/TrackballControls.js';
let perspectiveCamera, orthographicCamera, controls, scene, renderer, stats;
const params = {
orthographicCamera: false
};
const frustumSize = 400;
init();
animate();
function init() {
const aspect = window.innerWidth / window.innerHeight;
perspectiveCamera = new THREE.PerspectiveCamera( 60, aspect, 1, 1000 );
perspectiveCamera.position.z = 500;
orthographicCamera = new THREE.OrthographicCamera( frustumSize * aspect / - 2, frustumSize * aspect / 2, frustumSize / 2, frustumSize / - 2, 1, 1000 );
orthographicCamera.position.z = 500;
// world
scene = new THREE.Scene();
scene.background = new THREE.Color( 0xcccccc );
scene.fog = new THREE.FogExp2( 0xcccccc, 0.002 );
const geometry = new THREE.CylinderGeometry( 0, 10, 30, 4, 1 );
const material = new THREE.MeshPhongMaterial( { color: 0xffffff, flatShading: true } );
for ( let i = 0; i < 500; i ++ ) {
const mesh = new THREE.Mesh( geometry, material );
mesh.position.x = ( Math.random() - 0.5 ) * 1000;
mesh.position.y = ( Math.random() - 0.5 ) * 1000;
mesh.position.z = ( Math.random() - 0.5 ) * 1000;
mesh.updateMatrix();
mesh.matrixAutoUpdate = false;
scene.add( mesh );
}
// lights
const dirLight1 = new THREE.DirectionalLight( 0xffffff );
dirLight1.position.set( 1, 1, 1 );
scene.add( dirLight1 );
const dirLight2 = new THREE.DirectionalLight( 0x002288 );
dirLight2.position.set( - 1, - 1, - 1 );
scene.add( dirLight2 );
const ambientLight = new THREE.AmbientLight( 0x222222 );
scene.add( ambientLight );
// renderer
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 );
//
const gui = new GUI();
gui.add( params, 'orthographicCamera' ).name( 'use orthographic' ).onChange( function ( value ) {
controls.dispose();
createControls( value ? orthographicCamera : perspectiveCamera );
} );
//
window.addEventListener( 'resize', onWindowResize );
createControls( perspectiveCamera );
}
function createControls( camera ) {
controls = new TrackballControls( camera, renderer.domElement );
controls.rotateSpeed = 1.0;
controls.zoomSpeed = 1.2;
controls.panSpeed = 0.8;
controls.keys = [ 'KeyA', 'KeyS', 'KeyD' ];
}
function onWindowResize() {
const aspect = window.innerWidth / window.innerHeight;
perspectiveCamera.aspect = aspect;
perspectiveCamera.updateProjectionMatrix();
orthographicCamera.left = - frustumSize * aspect / 2;
orthographicCamera.right = frustumSize * aspect / 2;
orthographicCamera.top = frustumSize / 2;
orthographicCamera.bottom = - frustumSize / 2;
orthographicCamera.updateProjectionMatrix();
renderer.setSize( window.innerWidth, window.innerHeight );
controls.handleResize();
}
function animate() {
requestAnimationFrame( animate );
controls.update();
stats.update();
render();
}
function render() {
const camera = ( params.orthographicCamera ) ? orthographicCamera : perspectiveCamera;
renderer.render( scene, camera );
}
</script>
</body>
</html>