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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <title>three.js webgl - drag 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: #f0f0f0;
- color: #444;
- }
- a {
- color: #08f;
- }
- </style>
- </head>
- <body>
- <div id="info">
- <a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - drag controls<br />
- Use "Shift+Click" to add/remove objects to/from a group.<br />
- Use "M" to toggle between rotate and pan mode (touch only).<br />
- Grouped objects can be transformed as a union.
- </div>
- <script type="importmap">
- {
- "imports": {
- "three": "../build/three.module.js",
- "three/addons/": "./jsm/"
- }
- }
- </script>
- <script type="module">
- import * as THREE from 'three';
- import { DragControls } from 'three/addons/controls/DragControls.js';
- let container;
- let camera, scene, renderer;
- let controls, group;
- let enableSelection = false;
- const objects = [];
- const mouse = new THREE.Vector2(), raycaster = new THREE.Raycaster();
- init();
- function init() {
- container = document.createElement( 'div' );
- document.body.appendChild( container );
- camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 0.1, 500 );
- camera.position.z = 25;
- scene = new THREE.Scene();
- scene.background = new THREE.Color( 0xf0f0f0 );
- scene.add( new THREE.AmbientLight( 0xaaaaaa ) );
- const light = new THREE.SpotLight( 0xffffff, 10000 );
- light.position.set( 0, 25, 50 );
- light.angle = Math.PI / 9;
- light.castShadow = true;
- light.shadow.camera.near = 10;
- light.shadow.camera.far = 100;
- light.shadow.mapSize.width = 1024;
- light.shadow.mapSize.height = 1024;
- scene.add( light );
- group = new THREE.Group();
- scene.add( group );
- const geometry = new THREE.BoxGeometry();
- for ( let i = 0; i < 200; i ++ ) {
- const object = new THREE.Mesh( geometry, new THREE.MeshLambertMaterial( { color: Math.random() * 0xffffff } ) );
- object.position.x = Math.random() * 30 - 15;
- object.position.y = Math.random() * 15 - 7.5;
- object.position.z = Math.random() * 20 - 10;
- object.rotation.x = Math.random() * 2 * Math.PI;
- object.rotation.y = Math.random() * 2 * Math.PI;
- object.rotation.z = Math.random() * 2 * Math.PI;
- object.scale.x = Math.random() * 2 + 1;
- object.scale.y = Math.random() * 2 + 1;
- object.scale.z = Math.random() * 2 + 1;
- object.castShadow = true;
- object.receiveShadow = true;
- scene.add( object );
- objects.push( object );
- }
- renderer = new THREE.WebGLRenderer( { antialias: true } );
- renderer.setPixelRatio( window.devicePixelRatio );
- renderer.setSize( window.innerWidth, window.innerHeight );
- renderer.shadowMap.enabled = true;
- renderer.shadowMap.type = THREE.PCFShadowMap;
- container.appendChild( renderer.domElement );
- controls = new DragControls( [ ... objects ], camera, renderer.domElement );
- controls.rotateSpeed = 2;
- controls.addEventListener( 'drag', render );
- //
- window.addEventListener( 'resize', onWindowResize );
- document.addEventListener( 'click', onClick );
- window.addEventListener( 'keydown', onKeyDown );
- window.addEventListener( 'keyup', onKeyUp );
- render();
- }
- function onWindowResize() {
- camera.aspect = window.innerWidth / window.innerHeight;
- camera.updateProjectionMatrix();
- renderer.setSize( window.innerWidth, window.innerHeight );
- render();
- }
- function onKeyDown( event ) {
- enableSelection = ( event.keyCode === 16 ) ? true : false;
-
- if ( event.keyCode === 77 ) {
- controls.touches.ONE = ( controls.touches.ONE === THREE.TOUCH.PAN ) ? THREE.TOUCH.ROTATE : THREE.TOUCH.PAN;
-
- }
- }
- function onKeyUp() {
- enableSelection = false;
- }
- function onClick( event ) {
- event.preventDefault();
- if ( enableSelection === true ) {
- const draggableObjects = controls.objects;
- draggableObjects.length = 0;
- mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
- mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;
- raycaster.setFromCamera( mouse, camera );
- const intersections = raycaster.intersectObjects( objects, true );
- if ( intersections.length > 0 ) {
- const object = intersections[ 0 ].object;
- if ( group.children.includes( object ) === true ) {
- object.material.emissive.set( 0x000000 );
- scene.attach( object );
- } else {
- object.material.emissive.set( 0xaaaaaa );
- group.attach( object );
- }
- controls.transformGroup = true;
- draggableObjects.push( group );
- }
- if ( group.children.length === 0 ) {
- controls.transformGroup = false;
- draggableObjects.push( ...objects );
- }
- }
- render();
- }
- function render() {
- renderer.render( scene, camera );
- }
- </script>
- </body>
- </html>
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