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199 lines
4.3 KiB
199 lines
4.3 KiB
2 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 - lines - spheres</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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</head>
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<body>
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<div id="info">
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<a href="https://threejs.org" target="_blank" rel="noopener">three.js</a> - lines WebGL demo
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</div>
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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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const SCREEN_WIDTH = window.innerWidth,
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SCREEN_HEIGHT = window.innerHeight,
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r = 450;
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let mouseY = 0,
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windowHalfY = window.innerHeight / 2,
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camera, scene, renderer;
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init();
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animate();
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function init() {
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camera = new THREE.PerspectiveCamera( 80, SCREEN_WIDTH / SCREEN_HEIGHT, 1, 3000 );
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camera.position.z = 1000;
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scene = new THREE.Scene();
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const parameters = [[ 0.25, 0xff7700, 1 ], [ 0.5, 0xff9900, 1 ], [ 0.75, 0xffaa00, 0.75 ], [ 1, 0xffaa00, 0.5 ], [ 1.25, 0x000833, 0.8 ],
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[ 3.0, 0xaaaaaa, 0.75 ], [ 3.5, 0xffffff, 0.5 ], [ 4.5, 0xffffff, 0.25 ], [ 5.5, 0xffffff, 0.125 ]];
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const geometry = createGeometry();
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for ( let i = 0; i < parameters.length; ++ i ) {
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const p = parameters[ i ];
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const material = new THREE.LineBasicMaterial( { color: p[ 1 ], opacity: p[ 2 ] } );
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const line = new THREE.LineSegments( geometry, material );
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line.scale.x = line.scale.y = line.scale.z = p[ 0 ];
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line.userData.originalScale = p[ 0 ];
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line.rotation.y = Math.random() * Math.PI;
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line.updateMatrix();
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scene.add( line );
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}
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renderer = new THREE.WebGLRenderer( { antialias: true } );
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renderer.setPixelRatio( window.devicePixelRatio );
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renderer.setSize( SCREEN_WIDTH, SCREEN_HEIGHT );
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document.body.appendChild( renderer.domElement );
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document.body.style.touchAction = 'none';
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document.body.addEventListener( 'pointermove', onPointerMove );
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//
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window.addEventListener( 'resize', onWindowResize );
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// test geometry swapability
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setInterval( function () {
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const geometry = createGeometry();
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scene.traverse( function ( object ) {
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if ( object.isLine ) {
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object.geometry.dispose();
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object.geometry = geometry;
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}
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} );
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}, 1000 );
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}
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function createGeometry() {
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const geometry = new THREE.BufferGeometry();
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const vertices = [];
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const vertex = new THREE.Vector3();
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for ( let i = 0; i < 1500; i ++ ) {
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vertex.x = Math.random() * 2 - 1;
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vertex.y = Math.random() * 2 - 1;
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vertex.z = Math.random() * 2 - 1;
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vertex.normalize();
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vertex.multiplyScalar( r );
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vertices.push( vertex.x, vertex.y, vertex.z );
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vertex.multiplyScalar( Math.random() * 0.09 + 1 );
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vertices.push( vertex.x, vertex.y, vertex.z );
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}
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geometry.setAttribute( 'position', new THREE.Float32BufferAttribute( vertices, 3 ) );
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return geometry;
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}
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function onWindowResize() {
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windowHalfY = window.innerHeight / 2;
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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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if ( event.isPrimary === false ) return;
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mouseY = event.clientY - windowHalfY;
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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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}
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function render() {
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camera.position.y += ( - mouseY + 200 - camera.position.y ) * .05;
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camera.lookAt( scene.position );
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renderer.render( scene, camera );
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const time = Date.now() * 0.0001;
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for ( let i = 0; i < scene.children.length; i ++ ) {
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const object = scene.children[ i ];
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if ( object.isLine ) {
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object.rotation.y = time * ( i < 4 ? ( i + 1 ) : - ( i + 1 ) );
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if ( i < 5 ) {
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const scale = object.userData.originalScale * ( i / 5 + 1 ) * ( 1 + 0.5 * Math.sin( 7 * time ) );
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object.scale.x = object.scale.y = object.scale.z = scale;
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}
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}
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}
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}
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</script>
|
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</body>
|
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</html>
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