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223 lines
5.6 KiB
223 lines
5.6 KiB
3 years ago
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>three.js webgl - interactive lines</title>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
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<link type="text/css" rel="stylesheet" href="main.css">
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<style>
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body {
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background-color: #f0f0f0;
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color: #444;
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}
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a {
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color: #08f;
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}
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</style>
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</head>
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<body>
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<!-- Import maps polyfill -->
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<!-- Remove this when import maps will be widely supported -->
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<script async src="https://unpkg.com/es-module-shims@1.3.6/dist/es-module-shims.js"></script>
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<script type="importmap">
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{
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"imports": {
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"three": "../build/three.module.js",
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"three/addons/": "./jsm/"
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}
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}
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</script>
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<script type="module">
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import * as THREE from 'three';
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import Stats from 'three/addons/libs/stats.module.js';
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let container, stats;
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let camera, scene, raycaster, renderer, parentTransform, sphereInter;
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const pointer = new THREE.Vector2();
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const radius = 100;
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let theta = 0;
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init();
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animate();
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function init() {
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container = document.createElement( 'div' );
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document.body.appendChild( container );
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const info = document.createElement( 'div' );
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info.style.position = 'absolute';
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info.style.top = '10px';
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info.style.width = '100%';
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info.style.textAlign = 'center';
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info.innerHTML = '<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - interactive lines';
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container.appendChild( info );
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camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 1, 10000 );
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scene = new THREE.Scene();
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scene.background = new THREE.Color( 0xf0f0f0 );
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const geometry = new THREE.SphereGeometry( 5 );
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const material = new THREE.MeshBasicMaterial( { color: 0xff0000 } );
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sphereInter = new THREE.Mesh( geometry, material );
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sphereInter.visible = false;
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scene.add( sphereInter );
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const lineGeometry = new THREE.BufferGeometry();
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const points = [];
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const point = new THREE.Vector3();
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const direction = new THREE.Vector3();
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for ( let i = 0; i < 50; i ++ ) {
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direction.x += Math.random() - 0.5;
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direction.y += Math.random() - 0.5;
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direction.z += Math.random() - 0.5;
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direction.normalize().multiplyScalar( 10 );
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point.add( direction );
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points.push( point.x, point.y, point.z );
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}
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lineGeometry.setAttribute( 'position', new THREE.Float32BufferAttribute( points, 3 ) );
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parentTransform = new THREE.Object3D();
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parentTransform.position.x = Math.random() * 40 - 20;
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parentTransform.position.y = Math.random() * 40 - 20;
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parentTransform.position.z = Math.random() * 40 - 20;
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parentTransform.rotation.x = Math.random() * 2 * Math.PI;
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parentTransform.rotation.y = Math.random() * 2 * Math.PI;
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parentTransform.rotation.z = Math.random() * 2 * Math.PI;
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parentTransform.scale.x = Math.random() + 0.5;
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parentTransform.scale.y = Math.random() + 0.5;
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parentTransform.scale.z = Math.random() + 0.5;
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for ( let i = 0; i < 50; i ++ ) {
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let object;
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const lineMaterial = new THREE.LineBasicMaterial( { color: Math.random() * 0xffffff } );
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if ( Math.random() > 0.5 ) {
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object = new THREE.Line( lineGeometry, lineMaterial );
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} else {
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object = new THREE.LineSegments( lineGeometry, lineMaterial );
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}
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object.position.x = Math.random() * 400 - 200;
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object.position.y = Math.random() * 400 - 200;
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object.position.z = Math.random() * 400 - 200;
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object.rotation.x = Math.random() * 2 * Math.PI;
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object.rotation.y = Math.random() * 2 * Math.PI;
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object.rotation.z = Math.random() * 2 * Math.PI;
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object.scale.x = Math.random() + 0.5;
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object.scale.y = Math.random() + 0.5;
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object.scale.z = Math.random() + 0.5;
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parentTransform.add( object );
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}
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scene.add( parentTransform );
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raycaster = new THREE.Raycaster();
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raycaster.params.Line.threshold = 3;
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( window.innerWidth, window.innerHeight );
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container.appendChild( renderer.domElement );
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stats = new Stats();
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container.appendChild( stats.dom );
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document.addEventListener( 'pointermove', onPointerMove );
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//
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window.addEventListener( 'resize', onWindowResize );
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}
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function onWindowResize() {
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camera.aspect = window.innerWidth / window.innerHeight;
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camera.updateProjectionMatrix();
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renderer.setSize( window.innerWidth, window.innerHeight );
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}
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function onPointerMove( event ) {
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pointer.x = ( event.clientX / window.innerWidth ) * 2 - 1;
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pointer.y = - ( event.clientY / window.innerHeight ) * 2 + 1;
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}
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//
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function animate() {
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requestAnimationFrame( animate );
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render();
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stats.update();
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}
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function render() {
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theta += 0.1;
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camera.position.x = radius * Math.sin( THREE.MathUtils.degToRad( theta ) );
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camera.position.y = radius * Math.sin( THREE.MathUtils.degToRad( theta ) );
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camera.position.z = radius * Math.cos( THREE.MathUtils.degToRad( theta ) );
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camera.lookAt( scene.position );
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camera.updateMatrixWorld();
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// find intersections
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raycaster.setFromCamera( pointer, camera );
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const intersects = raycaster.intersectObjects( parentTransform.children, true );
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if ( intersects.length > 0 ) {
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sphereInter.visible = true;
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sphereInter.position.copy( intersects[ 0 ].point );
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} else {
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sphereInter.visible = false;
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}
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renderer.render( scene, camera );
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}
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</script>
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</body>
|
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</html>
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