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@@ -1,293 +0,0 @@
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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 - buffergeometry - lines drawcalls</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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- 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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-
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- <div id="container"></div>
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- <div id="info">
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- <a href="http://threejs.org" target="_blank" rel="noopener">three.js</a> webgl - buffergeometry drawcalls<br/>
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- by <a href="https://twitter.com/fernandojsg">fernandojsg</a>
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- </div>
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-
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- <script type="module">
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-
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- import * as THREE from '../build/three.module.js';
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-
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- import Stats from './jsm/libs/stats.module.js';
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- import { GUI } from './jsm/libs/dat.gui.module.js';
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-
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- import { OrbitControls } from './jsm/controls/OrbitControls.js';
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-
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- var group;
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- var container, stats;
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- var particlesData = [];
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- var camera, scene, renderer;
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- var positions, colors;
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- var particles;
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- var pointCloud;
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- var particlePositions;
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- var linesMesh;
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-
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- var maxParticleCount = 1000;
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- var particleCount = 500;
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- var r = 800;
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- var rHalf = r / 2;
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-
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- var effectController = {
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- showDots: true,
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- showLines: true,
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- minDistance: 150,
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- limitConnections: false,
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- maxConnections: 20,
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- particleCount: 500
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- };
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-
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- init();
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- animate();
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-
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- function initGUI() {
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-
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- var gui = new GUI();
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-
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- gui.add( effectController, "showDots" ).onChange( function ( value ) {
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-
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- pointCloud.visible = value;
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-
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- } );
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- gui.add( effectController, "showLines" ).onChange( function ( value ) {
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-
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- linesMesh.visible = value;
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-
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- } );
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- gui.add( effectController, "minDistance", 10, 300 );
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- gui.add( effectController, "limitConnections" );
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- gui.add( effectController, "maxConnections", 0, 30, 1 );
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- gui.add( effectController, "particleCount", 0, maxParticleCount, 1 ).onChange( function ( value ) {
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-
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- particleCount = parseInt( value );
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- particles.setDrawRange( 0, particleCount );
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-
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- } );
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-
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- }
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-
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- function init() {
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-
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- initGUI();
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-
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- container = document.getElementById( 'container' );
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-
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- camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 1, 4000 );
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- camera.position.z = 1750;
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-
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- var controls = new OrbitControls( camera, container );
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-
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- scene = new THREE.Scene();
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-
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-
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- group = new THREE.Group();
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- scene.add( group );
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-
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- var helper = new THREE.BoxHelper( new THREE.Mesh( new THREE.BoxBufferGeometry( r, r, r ) ) );
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- helper.material.color.setHex( 0x101010 );
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- helper.material.blending = THREE.AdditiveBlending;
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- helper.material.transparent = true;
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- group.add( helper );
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-
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- var segments = maxParticleCount * maxParticleCount;
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-
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- positions = new Float32Array( segments * 3 );
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- colors = new Float32Array( segments * 3 );
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-
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- var pMaterial = new THREE.PointsMaterial( {
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- color: 0xFFFFFF,
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- size: 3,
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- blending: THREE.AdditiveBlending,
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- transparent: true,
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- sizeAttenuation: false
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- } );
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-
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- particles = new THREE.BufferGeometry();
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- particlePositions = new Float32Array( maxParticleCount * 3 );
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-
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- for ( var i = 0; i < maxParticleCount; i ++ ) {
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-
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- var x = Math.random() * r - r / 2;
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- var y = Math.random() * r - r / 2;
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- var z = Math.random() * r - r / 2;
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-
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- particlePositions[ i * 3 ] = x;
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- particlePositions[ i * 3 + 1 ] = y;
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- particlePositions[ i * 3 + 2 ] = z;
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-
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- // add it to the geometry
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- particlesData.push( {
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- velocity: new THREE.Vector3( - 1 + Math.random() * 2, - 1 + Math.random() * 2, - 1 + Math.random() * 2 ),
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- numConnections: 0
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- } );
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-
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- }
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-
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- particles.setDrawRange( 0, particleCount );
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- particles.addAttribute( 'position', new THREE.BufferAttribute( particlePositions, 3 ).setDynamic( true ) );
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-
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- // create the particle system
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- pointCloud = new THREE.Points( particles, pMaterial );
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- group.add( pointCloud );
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-
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- var geometry = new THREE.BufferGeometry();
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-
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- geometry.addAttribute( 'position', new THREE.BufferAttribute( positions, 3 ).setDynamic( true ) );
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- geometry.addAttribute( 'color', new THREE.BufferAttribute( colors, 3 ).setDynamic( true ) );
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-
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- geometry.computeBoundingSphere();
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-
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- geometry.setDrawRange( 0, 0 );
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-
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- var material = new THREE.LineBasicMaterial( {
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- vertexColors: THREE.VertexColors,
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- blending: THREE.AdditiveBlending,
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- transparent: true
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- } );
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-
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- linesMesh = new THREE.LineSegments( geometry, material );
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- group.add( linesMesh );
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-
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- //
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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( window.innerWidth, window.innerHeight );
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-
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- renderer.gammaInput = true;
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- renderer.gammaOutput = true;
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-
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- container.appendChild( renderer.domElement );
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-
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- //
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-
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- stats = new Stats();
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- container.appendChild( stats.dom );
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-
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- window.addEventListener( 'resize', onWindowResize, false );
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-
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- }
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-
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- function onWindowResize() {
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-
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- camera.aspect = window.innerWidth / window.innerHeight;
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- camera.updateProjectionMatrix();
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-
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- renderer.setSize( window.innerWidth, window.innerHeight );
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-
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- }
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-
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- function animate() {
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-
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- var vertexpos = 0;
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- var colorpos = 0;
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- var numConnected = 0;
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-
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- for ( var i = 0; i < particleCount; i ++ )
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- particlesData[ i ].numConnections = 0;
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-
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- for ( var i = 0; i < particleCount; i ++ ) {
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-
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- // get the particle
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- var particleData = particlesData[ i ];
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-
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- particlePositions[ i * 3 ] += particleData.velocity.x;
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- particlePositions[ i * 3 + 1 ] += particleData.velocity.y;
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- particlePositions[ i * 3 + 2 ] += particleData.velocity.z;
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-
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- if ( particlePositions[ i * 3 + 1 ] < - rHalf || particlePositions[ i * 3 + 1 ] > rHalf )
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- particleData.velocity.y = - particleData.velocity.y;
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-
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- if ( particlePositions[ i * 3 ] < - rHalf || particlePositions[ i * 3 ] > rHalf )
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- particleData.velocity.x = - particleData.velocity.x;
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-
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- if ( particlePositions[ i * 3 + 2 ] < - rHalf || particlePositions[ i * 3 + 2 ] > rHalf )
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- particleData.velocity.z = - particleData.velocity.z;
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-
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- if ( effectController.limitConnections && particleData.numConnections >= effectController.maxConnections )
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- continue;
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-
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- // Check collision
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- for ( var j = i + 1; j < particleCount; j ++ ) {
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-
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- var particleDataB = particlesData[ j ];
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- if ( effectController.limitConnections && particleDataB.numConnections >= effectController.maxConnections )
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- continue;
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-
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- var dx = particlePositions[ i * 3 ] - particlePositions[ j * 3 ];
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- var dy = particlePositions[ i * 3 + 1 ] - particlePositions[ j * 3 + 1 ];
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- var dz = particlePositions[ i * 3 + 2 ] - particlePositions[ j * 3 + 2 ];
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- var dist = Math.sqrt( dx * dx + dy * dy + dz * dz );
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-
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- if ( dist < effectController.minDistance ) {
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-
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- particleData.numConnections ++;
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- particleDataB.numConnections ++;
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-
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- var alpha = 1.0 - dist / effectController.minDistance;
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-
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- positions[ vertexpos ++ ] = particlePositions[ i * 3 ];
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- positions[ vertexpos ++ ] = particlePositions[ i * 3 + 1 ];
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- positions[ vertexpos ++ ] = particlePositions[ i * 3 + 2 ];
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-
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- positions[ vertexpos ++ ] = particlePositions[ j * 3 ];
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- positions[ vertexpos ++ ] = particlePositions[ j * 3 + 1 ];
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- positions[ vertexpos ++ ] = particlePositions[ j * 3 + 2 ];
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-
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- colors[ colorpos ++ ] = alpha;
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- colors[ colorpos ++ ] = alpha;
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- colors[ colorpos ++ ] = alpha;
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-
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- colors[ colorpos ++ ] = alpha;
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- colors[ colorpos ++ ] = alpha;
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- colors[ colorpos ++ ] = alpha;
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-
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- numConnected ++;
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-
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- }
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-
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- }
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-
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- }
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-
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-
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- linesMesh.geometry.setDrawRange( 0, numConnected * 2 );
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- linesMesh.geometry.attributes.position.needsUpdate = true;
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- linesMesh.geometry.attributes.color.needsUpdate = true;
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-
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- pointCloud.geometry.attributes.position.needsUpdate = true;
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-
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- requestAnimationFrame( animate );
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-
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- stats.update();
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- render();
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-
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- }
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-
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- function render() {
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-
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- var time = Date.now() * 0.001;
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-
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- group.rotation.y = time * 0.1;
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- renderer.render( scene, camera );
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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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Fernando Serrano